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query stringlengths 1 13.4k | pos stringlengths 1 61k | neg stringlengths 1 63.9k | query_lang stringclasses 147
values | __index_level_0__ int64 0 3.11M |
|---|---|---|---|---|
Space time coding for a multiple input, multiple output (MIMO) system with finite-bit feedback and maximum-likehood (ML)-decoding is considered. Based on the analysis of union bound of error probability of the system, it is shown that designing the system with good performance can be divided into the following three st... | We derive performance limits for two closely related communication scenarios involving a wireless system with multiple-element transmitter antenna arrays: a point-to-point system with partial side information at the transmitter, and a broadcast system with multiple receivers. In both cases, ideal beamforming is impossi... | The research on formative assessment and feedback is reinterpreted to show how these processes can help students take control of their own learning, i.e. become self-regulated learners. This reformulation is used to identify seven principles of good feedback practice that support self-regulation. A key argument is that... | eng_Latn | 5,300 |
Impulsive noise (IN) is the most dominant factor degrading the performance of communication systems over powerlines. Many IN mitigation techniques have been introduced in the literature such as the application of a blanker at the front-end of the receiver which sets the incoming signal to zero when it exceeds a certain... | In this paper, we study the performance of an orthogonal frequency division multiplexing (OFDM) receiver with blanking nonlinearity in the presence of impulsive noise. Closed-form analytical expressions for the signal-to-noise ratio at the output of the blanking nonlinearity and the optimal blanking threshold are deriv... | Distillation at an infinite reflux ratio in combination with an infinite number of trays has been investigated. | eng_Latn | 5,301 |
An extended quadratic residue (QR)-decomposition (QRD)-based RLS-algorithm is introduced, applicable for equalization, allowing an estimate of the transmitted symbol, when it is a-priori unknown. To achieve low-cost implementations strength reduction and square-root free Givens-rotations are applied. Several QRD-based ... | Carefully designed PMP RLL systems at RF frequencies greater than 10 GHz are characterized by radio cells with a great number of network terminations with very small multipath propagation and only a few radio channels, if ever, with bad conditions. The proposed algorithm allows to equalise all radio channels with the... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,302 |
The authors investigate the relationship between the nonuniform sampling theorem and the fundamental theorem of information theory. This analysis leads to an alternative method of error correction. They propose not to correct for the lost samples but rather to reconstruct the original signal from the rest of the sample... | Communication Systems and Information Theory. A Measure of Information. Coding for Discrete Sources. Discrete Memoryless Channels and Capacity. The Noisy-Channel Coding Theorem. Techniques for Coding and Decoding. Memoryless Channels with Discrete Time. Waveform Channels. Source Coding with a Fidelity Criterion. Index. | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,303 |
This paper addresses the problem of tracking of time-varying mobile radio channels with time-varying parameters, and the channels are modeled as auto-regressive (AR) models. A polynomial H-infinity channel filter in Krein space is designed for the tracking problem. With the help of an ARMA innovation model, the solutio... | We consider the estimation of channel parameters for code-division multiple access (CDMA) communication systems operating over channels with either single or multiple propagation paths. The multiuser channel estimation problem is decomposed into a series of single user problems through a subspace-based approach. By exp... | This note presents an elementary proof of the familiar Routh-Hurwitz test. The proof is basically one continuity argument, it does not rely on Sturm chains, Cauchy index and the principle of the argument and it is fully self-contained. In the same style an extended Routh-Hurwitz test is derived, which finds the inertia... | eng_Latn | 5,304 |
DENSITY-DEPENDENT LESLIE MATRIX MODELING FOR LOGISTIC POPULATIONS WITH STEADY-STATE DISTRIBUTION CONTROL | Equilibrium and local stability in a logistic matrix model for age-structured populations | Completely Stale Transmitter Channel State Information is Still Very Useful | yue_Hant | 5,305 |
Precoding Method Interference Management for Quasi-EVD Channel | A novel signaling for communication on MIMO Y channel: Signal space alignment for network coding | An instrumental variable approach finds no associated harm or benefit from early dialysis initiation in the United States | eng_Latn | 5,306 |
Cooperative Coding Schemes: Design and Performance Evaluation | Design Criteria and Genetic Algorithm Aided Optimization of Three-Stage-Concatenated Space-Time Shift Keying Systems | On the Very Idea of a Conceptual Scheme | eng_Latn | 5,307 |
Closed-Form Sum-MSE Minimization for the Two-User Gaussian MIMO Broadcast Channel | A Game Theoretic Approach to Uplink Pilot and Data Power Control in Multi-Cell Multi-User MIMO Systems | A Multiple Mass-Flux Parameterization for the Surface-Generated Convection. Part I: Dry Plumes | eng_Latn | 5,308 |
A coherent amplify-and-forward relaying demonstrator without global phase reference | Distributed beamforming for information transfer in sensor networks | Amplify-and-forward with partial relay selection | eng_Latn | 5,309 |
Outage Capacity of MIMO Poisson Fading Channels | Service outage based power and rate allocation for parallel fading channels | Completely Stale Transmitter Channel State Information is Still Very Useful | eng_Latn | 5,310 |
Trellis coded double differentially coherent (TCD/sup 2/C) MPSK with carrier phase noise | The phase of a vector perturbed by Gaussian' noise and differentially coherent receivers | Completely Stale Transmitter Channel State Information is Still Very Useful | eng_Latn | 5,311 |
Separating distributed source coding from network coding | Efficient distributed source coding for multiple receivers via matrix sparsification | Network Coding for Correlated Sources | eng_Latn | 5,312 |
Blind channel estimation in synchronous MC-CDMA system with consideration of carrier offset compensation | Subspace based blind channel estimation for OFDM by exploiting virtual carrier | Completely Stale Transmitter Channel State Information is Still Very Useful | eng_Latn | 5,313 |
On an approximate eigenvector associated with a modulation code | The approximate eigenvector associated with a modulation code | The approximate eigenvector associated with a modulation code | eng_Latn | 5,314 |
Turbo Receivers for Single User MIMO LTE-A Uplink | Link adaptation in LTE-A uplink with Turbo SIC receivers and imperfect channel estimation | Microtubule capture by CENP-E silences BubR1-dependent mitotic checkpoint signaling | kor_Hang | 5,315 |
Full-rate and Low Complexity Space-time Coding Scheme Concatenated with LDPC Codes | Design of provably good low-density parity check codes | The Development of Turbo and LDPC Codes for Deep-Space Applications | eng_Latn | 5,316 |
From the STFT to the Wigner Distribution | On the ISAR Image Analysis and Recovery with Unavailable or Heavily Corrupted Data | Completely Stale Transmitter Channel State Information is Still Very Useful | eng_Latn | 5,317 |
On the Maximum Achievable Partial Decode-and-Forward Rate for the Gaussian MIMO Relay Channel | A zero-forcing partial decode-and-forward scheme for the Gaussian MIMO relay channel | A zero-forcing partial decode-and-forward scheme for the Gaussian MIMO relay channel | eng_Latn | 5,318 |
Broadband beamforming with alpha-stable distributions | Spectral density estimation for stationary stable processes | Completely Stale Transmitter Channel State Information is Still Very Useful | eng_Latn | 5,319 |
Series expansion of the MIMO spatial covariance | From antenna spacings to theoretical capacities - guidelines for simulating MIMO systems | A fine-grained solution to the mutual exclusion problem | eng_Latn | 5,320 |
Quasi-3D tool to analyse of the radio propagation channel | Radio channel investigations for mobile systems | Completely Stale Transmitter Channel State Information is Still Very Useful | eng_Latn | 5,321 |
Frequency-Domain Turbo Equalization with Soft Successive Interference Cancellation for Single Carrier MIMO Underwater Acoustic Communications | Joint equalization and phase drift estimation for underwater acoustic communications | Mounting evidence against the role of ICC in neurotransmission to smooth muscle in the gut | eng_Latn | 5,322 |
This paper provides an analysis of the performance of conventional preamble-based time synchronization techniques, which have been proposed for Orthogonal Frequency Division Multiplexing (OFDM) radio transmissions, in the context of optical Intensity Modulated and Direct Detected (IMDD) OFDM transmissions over single-m... | 5G wireless systems are envisioned to provide ultra-high data rates, increased robustness and low latency for new applications such as machine-to-machine (M2M) and car-to-car (C2C) communications. This paper considers high-speed visible light communication (VLC) as a candidate serving technology to fulfill this set of ... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,323 |
We study two different parallel concatenated coding schemes by way of EXIT chart prediction. One scheme is the famous turbo code, while the other is a concatenation of regular LDPC codes. Both schemes can be decoded by soft-in/soft-out decoders in an iterative fashion, which makes them attractive for usage in modern co... | The authors report the empirical performance of Gallager's low density parity check codes on Gaussian channels. They show that performance substantially better than that of standard convolutional and concatenated codes can be achieved; indeed the performance is almost as close to the Shannon limit as that of turbo code... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,324 |
We experimentally examine the maximum achievable transmission performance of a 7 channel Nyquist-WDM system with 10GBd per carrier. Back-to-back, a maximum of 11.9 bit/sym and 13.8 bit/sym can be transmitted for DP-64QAM and DP-256QAM respectively, while after 2 spans of transmission, a maximum of 12.4 bit/sym and 11.6... | Quantum mechanics allows measurements that surpass the fundamental sensitivity limits of classical methods. To benefit from the quantum advantage in a practical setting, the receiver should use communication channels resources optimally; this can be done employing large communication alphabets. Here we show the fundame... | We review currently discussed solutions for 80 km DWDM transmission targeting inter data-center connections at 100G and 400G line rates. PDM-64QAM, PAM4 and DMT are investigated, while the focus lies on directly detected solutions. | eng_Latn | 5,325 |
The fragment molecular-orbital (FMO) method was combined with the single-reference coupled-cluster (CC) theory. The developed method (FMO-CC) was applied at the CCSD and CCSD(T) levels of theory, for the cc-pVnZ family of basis sets (n=D,T,Q) to water clusters and glycine oligomers (up to 32 molecules/residues using as... | An electrostatically embedded generalized molecular fractionation with conjugate caps (EE-GMFCC) method is developed for efficient linear-scaling quantum mechanical (QM) calculation of protein energy. This approach is based on our previously proposed GMFCC/MM method (He; et al. J. Chem. Phys. 2006, 124, 184703), In thi... | Wireless transmission over 15Gb/s data rate is reported using space diversity MIMO. Multi-diversity planar antennas are designed and fabricated to transmit and receive the radio frequency signal simultaneously in 2 radiation diversities. Reliable 15Gb/s indoor data transmission over 5m distance is demonstrated in the s... | eng_Latn | 5,326 |
Combining coding, modulation, transmit and receive diversity, and validly increases the anti-noise performance in fading channels, OSTBC (orthogonal space-time block codes) is a new channel coding technology accompanying with the extensive application of wireless communication. Based on typical channel model of the OST... | A method of producing a panel heater element by the steps of mixing carbon fiber with natural or synthetic fibers, forming the mixture into a base sheet, heat-treating the base sheet to expel volatile matter therefrom, fitting electrodes to the sheet, placing an insulative thermoplastic resin film against both surfaces... | ABSTRACTUNC-45A is an ubiquitously expressed protein highly conserved throughout evolution. Most of what we currently know about UNC-45A pertains to its role as a regulator of the actomyosin system... | eng_Latn | 5,327 |
We consider a simple conceptual model of random accessing to a receiver deploying multiuser detection techniques. The model is a simple extension of Massey and Mathys' collision channel without feedback in which a certain probability of recovery from collision is introduced. As the main result, we derive the slot-synch... | We study and compare the Shannon capacity region and the stable throughput region for a random access system in which source nodes multicast their messages to multiple destination nodes. Under an erasure channel model which accounts for interference and allows for multipacket reception, we first characterize the Shanno... | E-commerce provides manufacturing enterprise with a direct access to market besides traditional sale channels, thus causing changes in the supply chain structure. A mixed-integer programming model based on optimal control theory for the new pattern supply chain of dual-channel market of manufacturing enterprise is deve... | eng_Latn | 5,328 |
In this paper, we investigate the robustness of the Unique Word Orthogonal Frequency Division Multiplexing (UW-OFDM) technique for channel estimation issue. We consider the UW-OFDM technique instead of Zero-Padding (ZP) OFDM one to construct the OFDM symbols for MultiBand Orthogonal Frequency Division Multiplexing Ultr... | This paper proposes low-complexity channel estimator for Unique Word (UW) MultiBand Orthogonal Frequency Division Multiplexing (MB-OFDM) based Ultra WideBand (UWB) communication systems. The proposed channel estimator is performed in two stages. The pre-FFT stage employs the Least Square (LS) estimation and smoothing t... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,329 |
In MIMO space division multiplexing (SDM) systems, the peak power of the transmit signal at each antenna element is increased by the precoder and hence it causes the power efficiency degradation and/or nonlinear distortion at the power amplifier. To solve this problem, this paper present a peak power aware precoding sc... | The use of space-division multiple access (SDMA) in the downlink of a multiuser multiple-input, multiple-output (MIMO) wireless communications network can provide a substantial gain in system throughput. The challenge in such multiuser systems is designing transmit vectors while considering the co-channel interference ... | By using a superluminescent diode as the light source and a depolariser inside the fibre coil, a constant scale factor is achieved without using polarisation control elements. For long-term behaviour an RMS-bias drift of 10 degrees/h is obtained. | eng_Latn | 5,330 |
Wireless channels operate through the transmission of electromagnetic signals from the transmitter to the receiver. In a fixed wireless network, the transmission medium is often distorted or disrupted by inherent natural phenomenon which in turn corrupt, obstruct or cause most of the data transmitted over the channel t... | A new and effective Doppler effects compensation scheme for orthogonal frequency division multiplex (OFDM) systems based on constellation estimation is presented with analytical descriptions that quantitatively clarify the mechanism of inter-carrier interference. The proposed compensation techniques, applicable in both... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,331 |
We study the asymptotic behavior of space-time codes when the number of transmit and receive antennas grows to infinity. Specifically, we determine the behavior of pairwise error probabilities with maximum-likelihood (ML) decoding and with three types of receiver interfaces: the ML interface, the linear zero-forcing (Z... | It is shown that while the mutual information curves for coded modulation (CM) and bit interleaved coded modulation (BICM) overlap in the case of a single input single output channel, the same is not true in multiple input multiple output (MIMO) channels. A method for mitigating fading in the presence of multiple trans... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,332 |
In this paper, the applicability of the subspace-based blind adaptive algorithm in multiple access ultra-wideband systems is investigated. However, in the multiuser transmission environment, multiple access interference becomes a serious issue and results in the degradation of system performance. In order to overcome t... | The results of indoor multipath propagation measurements using 10 ns, 1.5 GHz, radarlike pulses are presented for a medium-size office building. The observed channel was very slowly time varying, with the delay spread extending over a range up to about 200 ns and rms values of up to about 50 ns. The attenuation varied ... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,333 |
A computationally efficient expression is presented for evaluating the average bit error rate (BER) of an intensity-modulation and direct-detection free-space optical system with on-off keying signaling technique operating in turbulent atmosphere described by the exponentiated Weibull distribution. The presented numeri... | The performances of the decode-and-forward (DF) multihop free-space optical communication system with exponentiated Weibull distribution considering the fading induced by pointing error have been studied. With Meijer's G-function, the probability density function (PDF) of the aggregated channel model and the closed-for... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,334 |
In recent years, communications systems through mains, known as PLC (Powerline Communication), have received a lot of interest as part of intelligent networks or smart grids, as well as for multimedia applications at homes. In broadband PLC, systems using multicarrier modulations allow the mitigation of selective frequ... | The characteristics of the power line communication (PLC) channel are difficult to model due to the heterogeneity of the networks and the lack of common wiring practices. To get the full variability of the PLC channel, random channel generators are of great importance for the design and testing of communication algorit... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,335 |
This paper outlines that when decoding an arbitrary analog block codes, i.e., a block codes over the complex or real numbers, in an iterative fashion by splitting the H-Matrix in two, leads to a least-squares estimate. Such a Turbo-like algorithm represents iterative projections in Euclidean space. A step size controls... | The relationship between the discrete Fourier transform and error-control codes is examined. Under certain conditions we show that discrete-time sequences carry redundant information which then allow for the detection and correction of errors. An application of this technique to impulse noise cancellation for pulse amp... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,336 |
In this paper, we propose a cooperative diversity scheme to improve the end-to-end outage performance via Alamouti space-time block coding with two transmit antennas at a source node in a backward link and a best-relay selection scheme in a forward link. We derive an exact closed-form expression of the outage probabili... | Cooperative diversity improves the performance of wireless networks by having several nodes transmit the same information. We present an outage probability analysis for a decode-and-forward system, valid at all signal to noise ratios (SNR). A closed form solution is obtained for independent and identically distributed ... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,337 |
Three prominent features of massive MIMO are studied using channel measurements. Those features are extensively exploited in signal processing methods for massive MIMO and have been only partially, or not at all, validated. First, channel hardening is characterized as a function of the number of antennas. Second, user ... | In this paper, we consider the uplink of massive MIMO systems where the channel capacity is almost deterministic and varies slowly over time. We exploit this fact, by appropriately choosing the length of the codeword only once based on an initial estimate of the uplink channel capacity fed back by the base station (BS)... | We report enhancement of the mechanical stability of graphene through a one-step method to disperse gold nanoparticles on the pristine graphene without any added agent. | eng_Latn | 5,338 |
This paper presents a simple yet effective decoding for general quasi-cyclic low-density parity-check (QC-LDPC) codes, which not only achieves high hardware utility efficiency (HUE), but also brings about great memory block reduction without any performance degradation. The main idea is to split the check matrix into s... | High-throughput design approaches for quasi-cyclic (QC) low-density parity-check (LDPC) decoders are presented in this paper. Three novel schemes for the horizontal process in min-sum algorithm and its revisions are derived to reduce design and implementation complexity. The schemes can be directly applied for variant ... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,339 |
This paper presents a novel parallel architecture for decoding LDPC codes. The proposed architecture has low memory and interconnection requirements, becoming attractive for high speed applications such as fiber optic communications and high density magnetic recording. As an example, the implementation on an FPGA of a ... | We propose a novel class of provably good codes which are a serial concatenation of a single-parity-check (SPC)-based product code, an interleaver, and a rate-1 recursive convolutional code. The proposed codes, termed product accumulate (PA) codes, are linear time encodable and linear time decodable. We show that the p... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,340 |
Massive multiple-input multiple-output technology has been considered a breakthrough in wireless communication systems. It consists of equipping a base station with a large number of antennas to serve many active users in the same time-frequency block. Among its underlying advantages is the possibility to focus transmi... | We consider the uplink (UL) and downlink (DL) of non-cooperative multi-cellular time-division duplexing (TDD) systems, assuming that the number N of antennas per base station (BS) and the number K of user terminals (UTs) per cell are large. Our system model accounts for channel estimation, pilot contamination, and an a... | Adenomyoepithelioma is thought to be a low-grade malignancy, and cases showing malignant behavior are rare. | eng_Latn | 5,341 |
In this paper we propose a computationally effi- cient subcarrier allocation algorithm for a multiuser OFDM system suited for downlink and uplink transmission. The al- gorithm considers user-individual bitrate and power con- straints and allocates to each user the most appropriate subcarriers in a way that the total tr... | In this paper, we propose sub-carrier allocation algorithms for a multiple access scheme in downlink OFDM transmission. Knowing the channel characteristics of all the users at the base station, the sub-carrier allocation algorithm assigns sub-carriers to the users in a way that the total transmit power is minimized. An... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,342 |
A new numerical method based on numerical homogenization and model order reduction is introduced for the solution of multiscale inverse problems. We consider a class of elliptic problems with highl... | Certain projection post-processing techniques have been proposed for computing the boundary flux for two-dimensional problems (e.g., see Carey, et al. [5]). In a series of numerical experiments on elliptic problems they observed that these post-processing formulas for approximate fluxes were almost (O(h 2)-accurate for... | The use of space-division multiple access (SDMA) in the downlink of a multiuser multiple-input, multiple-output (MIMO) wireless communications network can provide a substantial gain in system throughput. The challenge in such multiuser systems is designing transmit vectors while considering the co-channel interference ... | eng_Latn | 5,343 |
The six-port receiver concept offers new possibilities on the way toward multi-band/multi-mode low cost receiver frontends for high frequencies up to the nun-wave range. The expense for the reduced effort on the analog side is claimed as higher complexity on digital side. Especially, the synchronization of the receiver... | Estimation of time-varying dispersive radio channels is one of the most important tasks of receiver synchronisation. State-of-the-art adaptive estimators employing decision feedback suffer from error propagation and limited robustness against faster fading. In this paper, the optimal feedforward channel estimator using... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,344 |
We consider degenerate elliptic equations of the form where X i, j are defined with the Heisenberg vector fields, and the matrix coefficient is uniformly elliptic. We obtain an invariant Harnack's inequality on metric balls for nonnegative solutions under the additional assumption that the ratio between the maximum and... | We consider second order linear degenerate-elliptic operators which are elliptic with respect to horizontal directions generating a stratified algebra of H-type. Extending a result by Guti\'errez and Tournier for the Heisenberg group, we prove a critical density estimate by assuming a condition of Cordes-Landis type. W... | In this work, we propose and investigate a new coding strategy devised to increase the throughput of hybrid ARQ (HARQ) transmission over block fading channel. In our proposition, the transmitter jointly encodes a variable number of bits for each round of HARQ. The parameters (rates) of this joint coding can vary and ma... | eng_Latn | 5,345 |
This paper analyzes the effect of the insuffi- cient synchronization (carrier frequency offset, timing off- set) on hexagonal multicarrier transmission (HMT) systems for doubly dispersive channel. Exact SINR and demodu- lated symbol expressions for HMT systems in the presence of insufficient synchronization transmissio... | This paper is concerned with various aspects of the characterization of randomly time-variant linear channels. At the outset it is demonstrated that time-varying linear channels (or filters) may be characterized in an interesting symmetrical manner in time and frequency variables by arranging system functions in (timef... | It is common practice to convert patients with acute respiratory insufficiency (ARI) from controlled mechanical ventilation to some form of assisted spontaneous breathing as early as possible. A widely used mode of assisted spontaneous breathing is patient-triggered inspiratory pressure support (IPS). We investigated 1... | eng_Latn | 5,346 |
In wireless scenarios an effective protocol to increase the reliability for time-varying channels is the hybrid automatic repeat request (H-ARQ). The H-ARQ scheme with cross-packet channel coding (CPC) is a recently published extension of H-ARQ with several advantages. No full-diversity low-density parity-check (LDPC) ... | In this work, we propose and investigate a new coding strategy devised to increase the throughput of hybrid ARQ (HARQ) transmission over block fading channel. In our proposition, the transmitter jointly encodes a variable number of bits for each round of HARQ. The parameters (rates) of this joint coding can vary and ma... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,347 |
In this paper, a novel fast CMA employing fast convolution in the DFT domain is proposed. It is similar to the FBLMS (frequency domain block LMS) which is used for the conventional linear adaptive filtering. However, the FBLMS can not be applied to the CMA, since the CMA has no reference signal and it should minimize t... | Conventional equalization and carrier recovery algorithms for minimizing mean-square error in digital communication systems generally require an initial training period during which a known data sequence is transmitted and properly synchronized at the receiver. This paper solves the general problem of adaptive channel ... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,348 |
Ever-increasing intra-datacenter traffic will spur the introduction of high-baud rates and high-order modulation formats. Increasing symbol rates and modulation levels decreases tolerance against transmission impairment that includes chromatic dispersion. Transmission distance in warehouse-scale datacenters can be seve... | We demonstrated a support vector machine (SVM) based machine learning method to mitigate modulation nonlinearity distortion for PAM-4 and PAM-8 vertical cavity surface emitter laser multi-mode fiber (VCSEL-MMF) optical link. Simulations at 100 Gb/s data rate and experimental work at 60 Gb/s data rate were carried out. ... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,349 |
Matrix multiplication operations are heavily used in communication systems, video, signal and image processing applications such as echo cancellation, adaptive beamforming, and Multiple-Input Multiple-Output (MIMO) systems, and are also used in matrix factorizations such as Cholesky, LU, QR and DCT. However, it is chal... | We introduce a 64-bit ANSI/IEEE Std 754-1985 floating point design of a hardware matrix multiplier optimized for FPGA implementations. A general block matrix multiplication algorithm, applicable for an arbitrary matrix size is proposed. The algorithm potentially enables optimum performance by exploiting the data locali... | Massive multiple-input multiple-output (MIMO) wireless communications refers to the idea equipping cellular base stations (BSs) with a very large number of antennas, and has been shown to potentially allow for orders of magnitude improvement in spectral and energy efficiency using relatively simple (linear) processing.... | eng_Latn | 5,350 |
In this paper, we propose a method for the reconstruction of a complex discrete-valued vector from its linear measurements. In particular, we mainly focus on the underdetermined cases, where the number of measurements is less than that of the unknown complex discrete variables, and propose a reconstruction approach of ... | Massive multiple-input multiple-output (MIMO) wireless communications refers to the idea equipping cellular base stations (BSs) with a very large number of antennas, and has been shown to potentially allow for orders of magnitude improvement in spectral and energy efficiency using relatively simple (linear) processing.... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,351 |
Interferences of various kinds are of a major concern in communication system design and operation, since they could cause serious system performance deterioration. As the demand on communication resources, such as frequency spectrum, increases steadily, the desire for a more effective signal processing techniques for ... | Use of multiple antennas at the transmitter and the receiver to increase the information capacity has received considerable attention. To exploit the capability of such systems in a practical way, it is of interest to ask if there are good codes with reasonable decoding complexity. Another question of interest is the s... | It is beyond controversy that in bimanual coordination tasks, parameter planning related to the movements of one hand influences the planning and execution of movements simultaneously performed with the other hand. A well-researched example of such bimanual interference is the finding that reaction times tend to be lon... | eng_Latn | 5,352 |
A model suitable for analyzing the nonlinear interaction between signal and noise, mediated by the Kerr effect in optical communication systems, is presented. This model treats separately signal and noise and permits analysis of the symbols' central time position and frequency evolution. It is shown that this nonlinear... | Using a recirculating loop, we measured nonlinearly induced timing jitter in a terrestrial wavelength-division-multiplexed system at different transmission distances with different amounts of precompensation. Within each 600-GHz subband, we achieved error-free transmission using the same amount of precompensation for a... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,353 |
This paper analyzes cross-polarization cancellation in dual-polarization digital radio links transmitting M-ary quadrature amplitude-modulation (M-QAM) signals. We consider the use of three options in the receiver: (1) no cancellation; (2) ideal (i.e., total) cancellation; and (3) optimal nondispersive cancellation. Fo... | Recent analysis/simulation studies have quantified the multipath outage statistics of digital radio systems using ideal adaptive equalization. In this paper, we consider the use of finite-tap delay line equalizers, with the aim of determining how many taps are needed to approximate ideal performance. To this end, we as... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,354 |
With the rapid development of communication technology, the demand of rate of communication network is higher and higher, and the problem of energy consumption is becoming more and more serious. Data and Energy Integrated communication Networks (DEINs) can simultaneously transmit information and energy for the terminal... | In this paper, we propose a power-efficient approach for information and energy transfer in multiple-input single-output downlink systems. By means of data-aided precoding, we exploit the constructive part of interference for both information decoding and wireless power transfer. Rather than suppressing interference as... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,355 |
The nonlinear behavior of power amplifier (PA) in orthogonal frequency-division multiplexing (OFDM)-based cogni- tive radio (CR) system introduces in-band and adjacent channel interferences. The power in the adjacent channels is an important issue in the CR because it can act as interference to primary users. In this p... | In this paper, we investigate an optimal power loading algorithm for an OFDM-based cognitive radio (CR) system. The downlink transmission capacity of the CR user is thereby maximized, while the interference introduced to the primary user (PU) remains within a tolerable range. We also propose two suboptimal loading algo... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,356 |
Channel noise in modern perpendicular channels is well approximated by a linear jitter model. In this paper, we propose a new type of Viterbi detector matched to such a channel model. The differentiating feature of this detector is recursive evaluation of whitened noise strengths for survivor paths using the on-the-fly... | The authors delayed-decision-feedback sequence estimation (DDFSE) for uncoded PAM signals is considered. Estimates on the performance of the algorithm are given, and simulation results are provided for several examples. A more general form of DDFSE applicable to coded modulation systems is also presented. As an example... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,357 |
In this work we consider the uplink of an OFDMA system and present a novel receiver that performs joint frequency offset acquisition, channel estimation and data detection for each active user. The proposed receiver can be used with any subcarrier assignment scheme, and it operates in an iterative fashion. Users' separ... | Multiuser orthogonal frequency division multiplexing (OFDM) with adaptive multiuser subcarrier allocation and adaptive modulation is considered. Assuming knowledge of the instantaneous channel gains for all users, we propose a multiuser OFDM subcarrier, bit, and power allocation algorithm to minimize the total transmit... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,358 |
This paper provides an overview on the rationales in incorporating massive multiple-input multiple-output (MIMO), non-orthogonal multiple access (NOMA), and interleave division multiple access (IDMA) in a unified framework. Our emphasis is on multi-user gain that refers to the advantage of allowing multi-user transmiss... | This paper considers uplink massive multiple-input multiple-output (MIMO) systems with lowresolution analog-to-digital converters (ADCs) over Rician fading channels. Maximum-ratio-combining (MRC) and zero-forcing (ZF) receivers are considered under the assumption of perfect and imperfect channel state information (CSI)... | Impaired gastric motility ascribable to a defective nitric oxide (NO) production has been reported in dystrophic (mdx) mice. Since relaxin upregulates NO biosynthesis, its effects on the motor resp... | eng_Latn | 5,359 |
Large array size real time direction finding systems like phased array radars require very fast processing of signals. With subspace based array signal processing like MUltipleSIgnalClassification (MUSIC) algorithm high accuracy and resolution can be achieved if the data collection time is sufficiently large or the Sig... | The number of digits it takes to write down an observed sequence x"1, ..., x"N of a time series depends on the model with its parameters that one assumes to have generated the observed data. Accordingly, by finding the model which minimizes the description length one obtains estimates of both the integer-valued structu... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,360 |
In this paper, an efficient implementation of the Chase II soft-input/soft-output (SISO) decoder using the distance-based decoding algorithm is proposed, where a piece-wise-linear based method is proposed to simplify the calculation of the extrinsic values. As a demonstration, a (64; 51; 6)2 block turbo decoder is impl... | This article presents an innovative turbo product code (TPC) decoder architecture without any interleaving resource. This architecture includes a full-parallel SISO decoder able to process n symbols in one clock period. Syntheses show the better efficiency of such an architecture compared with existing previous solutio... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,361 |
"Detection" in the title of this paper is used in the sense of decision-making, rather than demodulation. The ideal communication rate for a physical channel is provided by Shannon's formula C \leq W \log(1 + P/N) , and for a binary symmetric channel the theoretical amount of information per digit is I = 1 + p log p + ... | In this paper, we propose and discuss the challenges of a novel method for securing the readings of smart electricity meters against tampering or malfunctioning. We apply the idea of linear error-correcting block codes, which has originally been used in detecting and correcting errors in data transmission, to detect an... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,362 |
We describe a parallel algorithm for finding the eigenvalues and eigenvectors of a dense symmetric matrix. We follow the traditional three step process: we reduce the dense matrix to tridiagonal form, solve the tridiagonal problem then backtransform the result. Since the different steps have different algorithmic chara... | Dense linear systems of equations are quite common in science and engineering, arising in boundary element methods, least squares problems, and other settings. Massively parallel computers will be necessary to solve the large systems required by scientists and engineers, and scalable parallel algorithms for the linear ... | Information-theoretic security guarantees that a message is kept secret from potential eavesdroppers regardless of their current or future computational abilities. But current information-theoretic security approaches generally rely on an advantage of the channel of the desired recipient over the adversary, and such an... | eng_Latn | 5,363 |
Cooperative diversity using distributed space-time codes has been recently proposed to form virtual antennas in order to achieve diversity gain. In this paper, we propose a distributed space-time coding with amplify-and-forward relaying. Motivated by protocol (III) presented in [1], we propose a distributed space-time ... | We propose the use of simple full inter-relay self interference cancellation (FSIC) at the relay nodes within a four relay network. The four single antenna relay nodes are arranged as two spatially well separated groups of two relays with offset transmission scheduling. This approach can achieve the full available dist... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,364 |
A new algorithm for adapting the coefficients of an equalizer for continuous phase modulated data signals in a flat-fading environment is presented. The cost function to optimize is based on the maximum likelihood sequence estimation index for such signals and channel conditions. It is shown that this equalizer algorit... | An optimization criterion for inverse filtering (equalization) of signals transmitted over a Rayleigh flat-fading channel is presented. This criterion is based on the maximization of the ratio of the equalizer output power to the combined power of the intersymbol interference and the noise present at this output. A met... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,365 |
In this paper, we propose an method which is optimizing length of the equalizer taps using genetic algorithm (GA). The equalizer is a decision feedback equalizer (DFE). Feed-forward filter length and feed-back filter length are regarded as genetic information in GA. The GA uses different random cross-over methods. It f... | As real world communication channels are stressed with higher data rates, intersymbol interference (ISI) becomes a dominant limiting factor. One way to combat this effect that has recently received considerable attention is the use of a decision feedback equalizer (DFE) in the receiver. The action of the DFE is to feed... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,366 |
The concept of solitons has been successfully utilized in optical communications to handle signal distortion. In this light, the present work explores modulation using soliton carriers and subsequently, prototype wireless communication system based on Orthogonal Frequency Division Mutiplexing (OFDM) and Code Division M... | (NOTE: Most chapters begin with an Introduction and conclude with Summary, References, and Problems.) 1. Introduction to Digital Data Transmission. Components of a Digital Communication System. Communications Channel Modeling. Communication Link Power Calculations. Driving Forces in Communications. Computer Use in Comm... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,367 |
We propose an estimator for the Ricean K-factor which has applications in mobile communication systems. The estimator is based on the statistics of the instantaneous frequency (IF) of the received signal. Using simulations, we show that the proposed estimator is robust to shadowing and its mean-square error (MSE) is si... | In this paper, we investigate a downlink transmission algorithm for single-cell multiuser systems with two-dimensional (2-D) large-scale antenna array at the base station (BS) over Rician fading channels. We first derive some properties of the channel’s line-of-sight (LOS) component in the large-scale antenna array sce... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,368 |
One of the key advantages for the time-division duplex (TDD) system is the capability to deliver asymmetric traffic services by allocating different numbers of uplink and downlink time slots. However, in a TDD/code-division multiple-access (CDMA) system, asymmetric traffic may result in severe opposite-direction interf... | This second edition is an extensive modernization of the bestselling introduction to the subject of adaptive array sensor systems. With the number of applications of adaptive array sensor systems growing each year, this look at the principles and fundamental techniques that are critical to these systems is more importa... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,369 |
Modern automobiles comprise more and more radio systems and sensors, e.g. communication systems for LTE, systems based on the IEEE 802.11p standard, or radar sensors. Vehicle-to-vehicle and vehicle-to-infrastructure (vehicle-to-X) communications will play an important role to reduce accidents and also to improve traffi... | Multiple-input multiple-output (MIMO) over-the-air (OTA) testing is a standardized procedure to evaluate the performance of MIMO-capable devices such as mobile phones and laptops. With the growth of the vehicle-to-everything (V2X) service, the need for vehicular communication testing is expected to increase significant... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,370 |
In this paper, we study the performance of blind adaptive beamforming algorithms for smart antennas in realistic environments. A constrained constant modulus (CCM) design criterion is described and used for deriving a recursive least squares (RLS) type optimization algorithm. Furthermore, two kinds of scenarios are con... | The use of adaptive antenna techniques to increase the channel capacity is discussed. Directional sensitivity is obtained by using an antenna array at the base station, possibly both in receiving and transmitting mode. A scheme for separating several signals at the same frequency is proposed. The method is based on hig... | Perfect Quantum Cloning Machines (QCM) would allow to use quantum nonlocality for arbitrary fast signaling. However perfect QCM cannot exist. We derive a bound on the fidelity of QCM compatible with the no-signaling constraint. This bound equals the fidelity of the Bu\v{z}ek-Hillery QCM. | eng_Latn | 5,371 |
Maximum-likelihood (ML) receivers have been investigated for the fast frequency-hopped binary frequency-shift-keying (FFH/BFSK) spread-spectrum communications system with the worst case of the band multitone jamming and the additive white Gaussian noise over frequency-selective Rayleigh-fading channels. A suboptimal ML... | Based on the likelihood ratio, we derive the maximum-likelihood (ML) receiver for a synchronous fast frequency-hopped multiple-access system employing M-ary frequency-shift-keying (MFSK) modulation over frequency-selective Rayleigh-fading channels. The derived ML receiver is proposed and analyzed to obtain bit-error ra... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,372 |
The satellite system is one of the most efficient means for broadcasting due to its wide service coverage as well as the fact that it can provide high data rate services by using high frequency bands. However, there are a number of problems in the satellite system, such as a long round trip delay (RTD) and heterogeneit... | The Luby transform (LT) code is the first practical implementation of the digital fountain code, and its utilisation over a noisy channel invokes iterative decoding with soft information. For a good decoding performance, the role of the encoder degree distribution is vital. Especially, when utilising the soft iterative... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,373 |
A quantizer that must accommodate a wide range of signal powers would ordinarily require a large number of output levels compared to a quantizer of signals with known power. In this paper a quantizlng scheme is described for situations in which the signal power is unknown a priori but remains constant for the duration ... | We combine backward adaptive quantization with the scalar-vector quantizer (SVQ) and the trellis coded quantizer (TCQ) both of which have an underlying scalar quantizer (USQ) in their structure. The resulting adaptive scalar-vector quantizer (ASVQ) and adaptive trellis coded quantizer (ATCQ) redesign the USQ based on t... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,374 |
This work focuses on the impact of residual transmit impairments on the performance of Multiple-Input Multiple-Output (MIMO) systems with linear and non-linear receivers and precoders. We show that transmit noise significantly affects the performance of systems using precoding. Also, we show that non-linear MIMO receiv... | This study analyzes the impact of transmitter noise on the performance of multiple-input multiple-output (MIMO) systems with linear and nonlinear receivers and precoders. We show that the performance of MIMO linear and decision-feedback receivers is not significantly influenced by the presence of transmitter noise, whi... | This study analyzes the impact of transmitter noise on the performance of multiple-input multiple-output (MIMO) systems with linear and nonlinear receivers and precoders. We show that the performance of MIMO linear and decision-feedback receivers is not significantly influenced by the presence of transmitter noise, whi... | eng_Latn | 5,375 |
It has been established that the appropriate criteria for space-time trellis coded modulation (STTCM) design on slow Rayleigh fading channels are maximisation of the minimum rank and the minimum determinant of the distance matrices. It is demonstrated that when STTCM is used in systems with a large product (>3) of the ... | Optimum space-time convolution code, which provides maximum diversity and coding gain, are produced for cases with PSK modulation and various numbers of states and antennas. In this paper, we modify the conventional Viterbi algorithm used in space-time encoder under the MIMO system, and give the recursive metric equati... | MLL1 regulates circadian promoters by depositing H3K4 trimethyl marks, whose levels are also modulated by the NAD+-dependent deacetylase SIRT1. SIRT1 is now shown to promote circadian deacetylation of MLL1, thus affecting MLL1's methyltransferase activity. | eng_Latn | 5,376 |
In this paper, we consider the performance of downlink multiuser relay networks (MRN) equipped with a single amplify-and-forward (AaF) relay. We present exact analysis in closed-form for the outage probability of MRN with channel state information (CSI)-based gain relaying in Nakagami-m fading channels. In doing so, we... | The end-to-end performance of dual-hop cooperative diversity systems equipped with nonregenerative relays and a selection combining receiver at the destination terminal over independent and nonidentical Nakagami-m fading channels is studied. Closed-form expressions for the cumulative distribution function and the proba... | Distillation at an infinite reflux ratio in combination with an infinite number of trays has been investigated. | eng_Latn | 5,377 |
In this paper, we are concerned with low-complexity detection in large multiple-input multiple-output (MIMO) systems with tens of transmit/receive antennas. Our new contributions in this paper are two-fold. First, we propose a low-complexity algorithm for large-MIMO detection based on a {\em layered low-complexity loca... | Low-complexity near-optimal signal detection in large dimensional communication systems is a challenge. In this paper, we present a reactive tabu search (RTS) algorithm, a heuristic based combinatorial optimization technique, to achieve low-complexity near-maximum likelihood (ML) signal detection in linear vector chann... | Perfect Quantum Cloning Machines (QCM) would allow to use quantum nonlocality for arbitrary fast signaling. However perfect QCM cannot exist. We derive a bound on the fidelity of QCM compatible with the no-signaling constraint. This bound equals the fidelity of the Bu\v{z}ek-Hillery QCM. | eng_Latn | 5,378 |
Orthogonal space-time block codes (STBC), and the Alamouti scheme in particular, are of particular interest in multiple-input multiple-output (MIMO) systems since they achieve full spatial diversity over fading channels and are decoded from linear processing at the receiver. Nevertheless, due to the expensive spectral ... | The aim of this letter is to exhibit some advantages of using real constellations in large multiuser (MU) MIMO systems. It is shown that a widely linear zero-forcing (WLZF) receiver with M-ASK modulation enjoys a spatial-domain diversity gain, which linearly increases with the MIMO size even in fully- and over-loaded s... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,379 |
We present a novel frequency domain approach for the identification of a multiple-input multiple-output (MIMO) system driven by white, mutually independent unobservable inputs. Samples of the system frequency response are obtained based on parallel factorization (PARAFAC) of three-way tensors constructed based on third... | Equalization and estimation of the matrix impulse response function of multiple-input multiple-output (MIMO) digital communications channels in the absence of any training sequences is considered. An iterative, Godard (1980) cost-based approach is considered for spatio-temporal equalization and MIMO impulse response es... | The oxidative polymorphism of debrisoquine (DBQ) has been determined in 89 patients with colo-rectal cancer and in 556 normal control subjects. Four patients and 34 controls, with a metabolic ratio >12.6, were classified as poor metabolisers of DBQ (n.s.). | eng_Latn | 5,380 |
Digital angle modulations having input symbol memory can be demodulated using maximum likelihood sequence estimation (MLSE or Viterbi decoding). The demodulation of the more bandwidth efficient of these can require a large number of computations. In this paper, lower complexity decoding approaches are presented. These ... | In this paper, we propose a new algorithm for the surviving path decision in M-algorithm convolutional decoders. Correct path loss introduces one of the most destructive effects on the M-algorithm which mostly leads to catastrophic error. In the proposed M-algorithm survivor decision scheme, the M surviving states are ... | MLL1 regulates circadian promoters by depositing H3K4 trimethyl marks, whose levels are also modulated by the NAD+-dependent deacetylase SIRT1. SIRT1 is now shown to promote circadian deacetylation of MLL1, thus affecting MLL1's methyltransferase activity. | eng_Latn | 5,381 |
We propose a probing-based link adaptation scheme that is incorporated into the aggregation with fragment retransmission (AFR) scheme for high data rate wireless LANs (WLANs). Thanks to the frame structure of multiple fragments in AFR, the proposed scheme can significantly reduce the probing overhead by transmitting a ... | Wireless networks are under constant pressure to provide ever-higher data rates to increasing numbers of users with greater reliability. This book is an accessible introduction to every fundamental aspect of space-time wireless communications. Space-time processing technology is a powerful tool for improving system per... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,382 |
NMR diffusion measurements have proven to be a very powerful technique for probing the solution dynamics of polymer systems. In theory, it is possible to extract a range of useful information including molecular weights from the diffusion data. In practice, especially outside the infinite dilution regime, the data anal... | Molecular crowding occurs when the total concentration of macromolecular species in a solution is so high that a considerable proportion of the volume is physically occupied and therefore not accessible to other molecules. This results in significant changes in the solution properties of the molecules in such systems. ... | We summarize the enabling technologies for photonics-assisted broadband millimeter-wave (mm-wave) communication, which is a promising candidate for the enhanced mobile broadband (eMBB) communications, one of the three main typical application scenarios of 5G wireless networks. These enabling technologies, mainly focusi... | eng_Latn | 5,383 |
A new method allowing a reduction in the probability of clipping in discrete multitone (DMT)-based transceivers is described. The method does not use any kind of precoding and can easily be implemented within conventional DMT-transceivers. The main advantage of the proposed method is an improvement of system performanc... | This paper addresses the joint design of transmit and receive beamforming or linear processing (commonly termed linear precoding at the transmitter and equalization at the receiver) for multicarrier multiple-input multiple-output (MIMO) channels under a variety of design criteria. Instead of considering each design cri... | In this paper, we present a finite-granularity, loading algorithm for a discrete multitone (DMT) modulation system. The proposed algorithm offers significant implementational advantages over the well-known water-pouring method and the earlier Hughes-Hartogs algorithm, while typically suffering only negligible performan... | eng_Latn | 5,384 |
Following a strong trend towards cognitive connected cars, modern automobiles are equipped with a multitude of wireless communication systems. In order to ensure proper functionality, reliability, and resilience of these systems, the development of suitable test facilities and verification methods is of great interest ... | This paper presents a joint calculation of the precoding matrix indicator (PMI) and rank indicator (RI) in multiple-input multiple-output (MIMO) downlink third generation partnership project (3GPP) universal mobile telecommunications system (UMTS)/long-term evolution (LTE) systems. The standard codebook based precoding... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,385 |
This paper proposes a high capacity carrier interferometry/multicarrier code division multiple access (CI/MCCDMA)system through the simultaneous support of highand low data rate transmission. High data rate users transmitdata through all sub-carriers while alternate odd andeven subcarriers are shared by the low data ra... | Consider a Gaussian multiple-access channel shared by K users who transmit asynchronously independent data streams by modulating a set of assigned signal waveforms. The uncoded probability of error achievable by optimum multiuser detectors is investigated. It is shown that the K -user maximum-likelihood sequence detect... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,386 |
This paper proposes a new coding algorithm of speech compressing, which is based on Best Wavelet Packet Transform and SPIHT coding algorithm. The new approach applies the wavelet packet transform to process speech signal to obtain optimal wavelet tree to allocate the dynamic bits, and then uses the modified SPIHT codin... | Frequency -warped signal processing techniques are attractive to many wideband speech and audio applications since they have a clear connection to the frequency resolution of human hearing. A warped version of the linear predictive coding (LPC) for speech compression is implemented in this paper and an analysis of the ... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,387 |
In this paper, we investigate the average throughput of a multi-antenna wireless powered communication network where an energy-constrained user harvests energy from a hybrid access-point (AP) equipped with multiple antennas in the downlink, and then transmits information to the AP in the uplink using the harvested ener... | Performance of wireless powered relay with amplify-and-forward protocol is studied for Nakagami- $m$ fading channels. Different from the existing literature, we consider the nonlinearity of the energy harvester. An analytical expression is derived for the complementary cumulative distribution function (CCDF) of the end... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,388 |
As converged services are becoming the standard for corporate networks, concerns have been arising on the best way to ensure efficient use of expensive WAN bandwidth. Achieving excellent quality of multimedia and voice communication requires the allocation of large bandwidth for these services. In most cases, lossy com... | In this paper, we present an optimal UEP framework for transmitting packetized audio streams over MIMO wireless links. Our proposed framework aims at maximizing the expected end-to-end Segmented SNR of a received audio sequence. It reduces the packetization overhead of small audio frames while protecting audio streams ... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,389 |
This paper proposes a new adaptive source-channel coding scheme in the context of subband coding. We first express the total mean-squared distortion suffered by the source in terms of source and channel distortions of the subbands. We then minimize this total distortion by an appropriate choice of source and channel co... | This paper presents a low-complexity method of transmitting digitally compressed imagery through AWGN and fading channels. The proposed method combines a wavelet-based image coder that employs phase scrambling and trellis-coded quantization (TCQ), and source adaptive modulation (SAM). We present two versions of SAM tha... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,390 |
Multi-pulse position modulation (M-PPM) is advantageous in a visible light communication system due to its overall satisfactory performance in spectrum efficiency and dimming control. In this letter, we consider the joint dimming and communication design with M-PPM. We provide a model for the dimming control and addres... | Visible light communication (VLC) uses solid-state lightings to transmit information; therefore, it is necessary that modulation schemes for VLC provide dimming control. In this letter, we propose a multiple pulse position modulation (MPPM) to offer both functions of modulating data-stream and controlling the brightnes... | In genome rearrangements, the mutational event \emph{transposition} swaps two adjacent blocks of genes in one chromosome. The \emph{Transposition Distance Problem} (TDP) aims to find the minimum number of transpositions (distance) required to transform one chromosome into another, both represented as permutations. Sett... | eng_Latn | 5,391 |
Realistic channel models are crucial in developing future wireless systems. Channel sounding and consequently propagation parameter estimation are key tasks in creating such models. In this paper we present an estimator for the angular distribution of the diffuse scattering component that is frequently observed in chan... | The increased popularity of array antennas for wireless communication, has inspired investigations of the spatio-temporal properties of the radio channel, among others the azimuthal shape of the scattering clusters. Based on a statistical analysis, we show that trying to estimate the shape of the scattering is an ill-p... | We prove that groups acting geometrically on delta-quasiconvex spaces contain no essential Baumslag-Solitar quotients as subgroups. This implies that they are translation discrete, meaning that the translation numbers of their nontorsion elements are bounded away from zero. | eng_Latn | 5,392 |
This paper proposes chip coding using convolutional codes for fast frequency-hopping spread-spectrum multiple-access (FFH-SSMA) systems. Its performance is evaluated and compared with that of repetition coding which is most commonly used in FFH systems. In our proposal, an information symbol is encoded by a convolution... | Performance of robust soft decoding metrics is examined for use in convolutional coded asynchronous fast frequency-hop spread-spectrum multiple-access networks using binary frequency-shift keying under Rayleigh fading channels. For comparison, maximum-likelihood metrics based on a Gaussian approximation are derived. Si... | Berzelius failed to make use of Faraday's electrochemical laws in his laborious determination of equivalent weights. | eng_Latn | 5,393 |
Multimode fibers are normally known to have a channel for carrying a signal mainly by their 3-dB modal bandwidth ranging between 200 to 500 MHz-km, depending on the material and structure of the fiber. To use only this 3-dB modal bandwidth, a higher data rate signal cannot be successfully transmitted. Alternatively, it... | The bandwidth-distance product limitations of multimode fiber caused by intermodal dispersion may be overcome by using subcarrier multiplexing. Since there are deep nulls in the frequency response within the frequency band of interest, it is necessary either to avoid these frequencies adaptively or to use an appropriat... | By using a superluminescent diode as the light source and a depolariser inside the fibre coil, a constant scale factor is achieved without using polarisation control elements. For long-term behaviour an RMS-bias drift of 10 degrees/h is obtained. | eng_Latn | 5,394 |
Effect of Changing the Symbol Rate of QAM Modem on the Performance of 32kb/s ADPCM System | This paper presents three models of Quadrature Amplitude Modulation (QAM) modem operating at data rate of 16.8kb/s to be transmitted over 32kb/s Adaptive Differential Pulse Code Modulation (ADPCM) channel. These modems operate at symbol rates of 2400, 2800, and 3360 baud with associated number of bits per symbol of 7, ... | The structure of GMA is introduced. Static displacement-force model and magnetism-machine coupling model for helping understand the magnetostriction and establishes simulation model are given. Simulation result shows that response time of machine part is slowness. It brings some disbennifit affection if minish damp. Fo... | eng_Latn | 5,395 |
Assessments of Sc-Containing Ternary Systems Al–Sc–Ti and Al–Sc–Zr Within the Thermodynamic Database for Aluminium Alloys, TCAL5 | This paper presents the assessment of two Sc-containing ternary systems, Al–Sc–Ti and Al–Sc–Zr , within the project for developing the thermodynamic database for aluminium alloys TCAL5. A brief review was made on the Al-rich phase equilibria, which are relevant to the (Al) matrix phase and the hardening precipitate Al3... | In this work, we introduce a new space---time coding (STC) paradigm which is based on the joint design of quasi-orthogonal space---time block code (Q-OSTBC) and the successive interference cancellation (SIC) detector. Based on the proposed principle, two high-rate Q-OSTBCs for three and four transmit antennas are desig... | kor_Hang | 5,396 |
Instantaneous Mutual Information and Eigen-Channels in MIMO Mobile Rayleigh Fading | In this paper, we study two important metrics in multiple-input multiple-output (MIMO) time-varying Rayleigh flat fading channels. One is the eigen-channel, and the other is the instantaneous mutual information (IMI). Their second-order statistics, such as the correlation coefficient, level crossing rate (LCR), and ave... | We propose and experimentally demonstrate a low-loss and low-crosstalk Mach-Zehnder mode/wavelength multi/demultiplexer for WDM/MDM transmission. A broadband 3dB mode divider, which is also newly devised here, makes it possible to compose Mach-Zehnder filter for “mode” and “wavelength” simultaneously. | eng_Latn | 5,397 |
Unitary ESPRIT-based DOA estimation using sparse linear dual size spatial invariance array | We consider the direction-of-arrival estimation problem with a particular class of sparse linear arrays, composed of multiple widely separated subarrays. A new unitary ESPRIT- based direction-finding approach is proposed for such class of sensor arrays. The unambiguous estimates of direction cosines based on a half-wav... | Network performance can be improved by allowing adaptive routing, but doing so introduces new possibilities of deadlock which can overwhelm the flexibility advantages. Planar-adaptive routing resolves this tension by limiting adaptive routing to a series of two-dimensional planes, reducing hardware requirements for dea... | eng_Latn | 5,398 |
Hybrid modulation as beacon replacement in CubeSat picosatellites | At present a CW beacon with Morse code or OOK modulation is still commonly used in picosatellites (especially in CubeSats) for signaling that picosatellite is currently rising above the horizon and for limited telemetry transmission about picosatellite functionality. This transmission with limited EIRP could be replace... | We present calculations for {sup 8}Be-{sup 8}Be cluster states in {sup 16}O based on our recent schematic coupled-channels model. We justify some of the approximations made in the schematic model in this paper. The present calculations broadly support our assumptions about the states in {sup 16}O which formed the basis... | eng_Latn | 5,399 |
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