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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 |
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A Novel Scheme for Type-II Hybrid ARQ Protocols Using LDPC Codes | In this paper, we propose a novel type-II hybrid ARQ scheme using low density parity check (LDPC) codes. The proposed approach combines low hardware overhead with good decoding performance by using an efficient decoder operating at a much higher rate with a much smaller size parity check matrix. Our scheme makes parts ... | Abstract A new discrete two-by-two matrix spectral problem with two potentials is introduced, followed by a hierarchy of integrable lattice equations obtained through discrete zero curvature equations. It is shown that the Hamiltonian structures of the resulting integrable lattice equations are established by virtue of... | kor_Hang | 5,400 |
Study of DOA Joint Estimate Algorithms Based on Bis/multistatic | A new approach was proposed for the DOA joint estimation of signal,and the algorithms are based on ESPRIT and two or more array data correlation matrix.It estimated simultaneously the DOA of bis/multistatic.The algorithms estimated parameter are auto paired.The CRLB of the DOA stimation was also derived.The simulating ... | A geometric approach in the design of codebooks for OR frequency-hopping multiple-access (FHMA) channels is developed by treating a signal matrix as a finite set of distinct points. The relationship among the parameters of an interference-free j-distinguishable-point codebook, j>or=1, is established by using coordinate... | eng_Latn | 5,401 |
A Multi-User Receiver for PUCCH LTE FORMAT 1 in Non-Cooperative Multi-Cell Architectures | In this paper, we propose a new multi-user receiver processing for PUCCH LTE that counteracts the ICI in a non-cooperative multi-cell architecture. Using the fact that the received signal in PUCCH signaling follows a constrained tensor model, a multi-user receiver based on an iterative joint channel/code estimation and... | Abstract This study contributes to the literature on socially responsible investing by examining the diversification potential of commodities, specifically oil, gold and clean energy together with the Brazilian Corporate Sustainability Index (ISE). Multivariate GARCH models are used to model volatility spillovers and c... | kor_Hang | 5,402 |
A novel diversity transmission technique using cooperative relay | In this paper, a novel diversity transmission technique using cooperative relay is presented. Although the conventional distributed space-time coded cooperative (DSTC) system achieves a diversity gain with single antenna user and relay, there is tradeoff between the diversity gain and resource requirements. Therefore, ... | Current algorithms for reader-writer synchronization do not scale for readers: readers cannot acquire locks in parallel. The authors describe two new algorithms that allow parallelism among readers during lock acquisition; this is achieved by distributing the lock state among different processors, and by trading reader... | eng_Latn | 5,403 |
Re-transmission controlling method and wireless communication terminal apparatus | The invention relates to a variable support robust transform for multiple description coding. A multi-level transform generates descriptions containing compressed data that represents source data using a description generation operation and variable support filters for compaction at each level. The initial level filter... | The problem of scaling down the size of the transmitting antenna of a solar power satellite is briefly discussed. It is shown that a multibeam Power Relay Satellite leads to smaller ground receiver stations which will improve the market penetration of power satellites. (WHK) | eng_Latn | 5,404 |
Channel Estimation and Uplink Achievable Rates in One-Bit Massive MIMO Systems | This paper considers channel estimation and achievable rates for the uplink of a massive multiple-input multiple-output (MIMO) system where the base station is equipped with one-bit analog-to-digital converters (ADCs). By rewriting the nonlinear one-bit quantization using a linear expression, we first derive a simple a... | Consider arbitrary collections A = a_1,a_2,.. .,a_n of items and Q = q_1,q_2,...,q_m (1 leqslant mn leqslant n) of queries from a totally ordered universe. The multiple rank problem involves computing for every query qi the number of items in A that have a lesser value. Our contribution is to show that the problem at h... | eng_Latn | 5,405 |
Differences in Paramedic Fatigue before and after Changing from a 24-hour to an 8-hour Shift Schedule: A Case Report. | AbstractEmergency medical services (EMS) clinicians often work 24-hour shifts. There is a growing body of literature, with an elevated level of concern among EMS leaders that longer shifts contribute to fatigued workers and negative safety outcomes. However, many questions remain about shift length, fatigue, and outcom... | A multihop regenerative relay system is considered. We explore adaptive power allocation (PA) under a total power constraint to minimize the system error probability when the perfect channel state information (CSI) is known at the transmitters. We propose adaptive PA schemes with limited feedback when the transmitters ... | eng_Latn | 5,406 |
Assignment of EC Numbers to Enzymatic Reactions with MOLMAP Reaction Descriptors and Random Forests | The MOLMAP descriptor relies on a Kohonen SOM that defines types of covalent bonds on the basis of their physicochemical and topological properties. The MOLMAP descriptor of a molecule represents the types of bonds available in that molecule. The MOLMAP descriptor of a reaction is defined as the difference between the ... | This paper considers channel estimation and achievable rates for the uplink of a massive multiple-input multiple-output (MIMO) system where the base station is equipped with one-bit analog-to-digital converters (ADCs). By rewriting the nonlinear one-bit quantization using a linear expression, we first derive a simple a... | eng_Latn | 5,407 |
Japanese business down-under : patterns of Japanese investment in Australia, 1957-1985 | Part I: Australia's Role in the Internationalistion of the Japanese Economy 1. Japanese Transnational Corporations: Motivations and Overseas Strategies 2. Japan, Australia and the Pacific Rim Part II: Japanese Business Activity in Australia, 1957-1985 3. Trading Companies 4. Manufacturing Companies 5. Banks and Financi... | Abstract In this paper, we consider a multiple-input multiple-output (MIMO) cooperative communication system with single decode and forward (DF) relay. The system performance is analyzed by using joint antenna and path selection (JAPS) scheme over Nakagami-m fading channel. Then, we propose to use both JAPS and Sub-opt... | eng_Latn | 5,408 |
Erbium-ytterbium co-doped fiber amplifier with controlled 1060-nm Yb-ASE | In this work we present a new design of Er/Yb co-doped fiber amplifier with controlled amplified spontaneous emission ::: (ASE) at 1 μm. The Yb-ASE is controlled by stimulating a laser emission at 1064 nm in the amplifier, by providing ::: a positive 1 μm signal feedback loop. The results were discussed and compared to... | We present, by extension of some earlier results, the expression of an upper bound on the bit error rate (BER) of a digital communication system operating on a frequency selective channel linking N mobiles to an M/sup th/ order space diversity receiver using optimum combining and linear equalization. The bound is then ... | eng_Latn | 5,409 |
Test of the Effectiveness of Hedging | FUTURES markets have been analyzed in two apparently different ways for the purpose of evaluating their efficiency for hedging purposes. The different approaches purport to reflect different concepts of hedging. The main objective of this article is to examine the relationship between the two testing procedures and to ... | In this paper the least squares problem of signal estimation is introduced. The Code-Division Multiple Access (CDMA) signal model is transformed into a least squares minimization form. Based on the solutions of the problem, different receiver structures are derived. Channel estimation using least-squares method is also... | eng_Latn | 5,410 |
Elementary Mathematics Resource Teacher Program. | Standardized test results over the years have shown that children in Philadelphia's inner-city public schools have been doing poorly in mathematics. In fact, the alarming statistics indicate that as the number of years a child spends in school increases, the child's success in achieving grade-level standards decreases.... | This paper considers channel estimation and achievable rates for the uplink of a massive multiple-input multiple-output (MIMO) system where the base station is equipped with one-bit analog-to-digital converters (ADCs). By rewriting the nonlinear one-bit quantization using a linear expression, we first derive a simple a... | kor_Hang | 5,411 |
Cutoff-cladding waveguides: Subdiffraction guided modes near cutoff | We propose a class of waveguides operating near cutoff such that electromagnetic energy is mainly bound to the cladding rather than the dielectric core to achieve subdiffraction confinement of light. The cladding incorporates an alternating stack of thin films that exhibit uniaxial form birefringence with a high contra... | The purpose of this paper is to introduce a semi-blind channel estimation approach for MIMO-OFDM Systems. The proposed method is a combination of pilot and blind channel estimations on Independent Data Blocks (IDB). First, the Pilots are used to find the channel characteristics. By taking the average of subsequent pilo... | eng_Latn | 5,412 |
A group communication protocol for CORBA | Group communication protocols are used in fault-tolerant systems to maintain strong replica consistency. The Fault-Tolerant Multicast Protocol (FTMP) described here is a group communication protocol specifically designed for the common object request broker architecture (CORBA). FTMP operates over IP Multicast, and con... | A new approach was proposed for the DOA joint estimation of signal,and the algorithms are based on ESPRIT and two or more array data correlation matrix.It estimated simultaneously the DOA of bis/multistatic.The algorithms estimated parameter are auto paired.The CRLB of the DOA stimation was also derived.The simulating ... | eng_Latn | 5,413 |
Reliable Communication Over Arbitrarily Varying Channels Under Block-Restricted Jamming | Time diversity for reliable communication is examined in an information-theoretic framework by investigating information transmission over an Arbitrarily Varying Channel (AVC) under maximum error criterion and introducing the concept of block-restricted jamming. Positivity of the maximum error capacity of an AVC is dir... | We study the Radiation-Induced Mismatch Enhancement (RIME) in 65 nm CMOS SRAM block designed for space applications. X-ray and heavy ion irradiation increase the number of non-rewriting cells. | eng_Latn | 5,414 |
Least squares approach to data-aided frequency estimation in frequency-selective fading channels | A new data-aided frequency estimator for frequency-selective fading channels is introduced. This estimator is developed based on a least squares (LS) error criterion. The proposed method can estimate frequency offsets without the need for channel information. It is shown through simulation that the proposed LS method c... | ABSTRACTIn this paper, using the piecewise linear and quadratic Lagrange interpolation functions, we propose a novel numerical approximate method for the Caputo fractional derivative. For the obtai... | eng_Latn | 5,415 |
The generalized angular momentum crossing relation | Abstract In low energy meson baryon scattering a specific partial wave amplitude in the direct channel will contain contributions from the exchange of resonances in all partial waves in the crossed channel. These contributions, first considered by Carruthers for pion-nucleon scattering, are evaluated in the limit where... | Ultra wide band (UWB) impulse radio (IR) technology calls for robust and low-complexity receiver techniques. State-of-the-art proposals are both coherent ML receivers, noncoherent transmitted reference systems, or hybrid choices, all of which are derived from an AWGN model. In this paper we investigate an alternative t... | eng_Latn | 5,416 |
A preamble-aided symbol and frequency synchronization scheme for OFDM systems | Orthogonal frequency division multiplexing is considered to be an appealing modulation technique for high-speed wireless communication systems owing to its spectral efficiency and robustness against multipath fading. However, an OFDM system is very sensitive to synchronization and a small frequency or timing offset may... | This book, which was first published in Russian in 2005, deals with the homogenization of partial differential equations (pdes) of elliptic and parabolic types. The authors study both boundary value problems posed in highly perforated domains or equations with rapidly oscillating coefficients. The standard theory of ho... | eng_Latn | 5,417 |
Order statistics based diversity combining for fading channels | We present a new order statistics based diversity combining scheme (OSDC) for combining a set of independently fading signal amplitudes. The OSDC orders all the received signal amplitudes and uses only the two strongest signals in the combining process. The decision as to whether to use only the strongest or both the s... | The space distribution pattern of the Neosyrista similis was researched from April to May in 2005.By using 6 kinds of analyzing index,including the diffusion coefficient,we confirmed the space distribution pattern of the insect was aggregated distribution,the distributing fundamental component was individual.By using t... | eng_Latn | 5,418 |
Performance of a subcarrier intensity modulated differential phase-shift keying over generalized turbulence channel | Abstract Optical wireless communication technologies are finding a greater interest and wider attention within the research community of late. In this paper, we investigate the performance of a free space optical communication system over a generic propagation model called M -distributed channel in the presence of atmo... | The ratio of the axial to vector neutron decay constants is determined via QCD sum rules. The advantageous use of the arbitrariness in the definition of the nucleon operator leads to a result which is unambiguous. The only input parameter is the value of the chiral symmetry breaking vacuum quark condensate.\(\langle \b... | eng_Latn | 5,419 |
A novel pre-coding orthogonal full diversity space-time block coding scheme for 4×4 MIMO system | In this paper we consider a novel design of space-time block code combined with pre-coding module transmission system. Theory of orthogonal designs has shown that such code cannot be simultaneously orthogonal, of rate 1, with full diversity order, for more than 2 transmit antennas. We propose in this paper a new way to... | We present an algorithm for model checking temporal-epistemic properties of multi-agent systems, expressed in the formalism of interpreted systems. We first introduce a technique for the translation of interpreted systems into boolean formulae, and then present a model-checking algorithm based on this translation. The ... | eng_Latn | 5,420 |
Outage analysis for joint antenna and path selection decode-and-forward relay networks | Abstract In this paper, we consider a multiple-input multiple-output (MIMO) cooperative communication system with single decode and forward (DF) relay. The system performance is analyzed by using joint antenna and path selection (JAPS) scheme over Nakagami-m fading channel. Then, we propose to use both JAPS and Sub-opt... | Standard basic encoding rules are too elaborate and inefficient for distributed real-time applications. Two major obstacles encountered are long protocol data units and slow encoding times. The problem of encoding for real-time applications is addressed. Taking Fieldbus as a representative of real-time networks, it is ... | eng_Latn | 5,421 |
Enhancement of noisy speech using sub-band harmonic regeneration and speech presence uncertainty estimator | This paper presents a noise reduction technique based on sub-band harmonic regeneration with Speech Presence Uncertainty (SPU). Harmonic Regeneration (HRNR) overcomes the harmonic distortion, which is significant at low SNR values by preserving harmonics. For further noise suppression at low SNRs, Sub-band modification... | We assume a CDMA downlink multiuser scenario, where the base station is equipped with multiple transmit antennas, and each user has multiple receive antennas. For this setup we propose a new, computationally effective MIMO multiuser detector for frequency selective channels. We exploit the fact that the interference ma... | eng_Latn | 5,422 |
The Application of Hall-Effect Devices to the Measurement of Microwave Power Density | A theory is developed that indicates a Hall-effect device should function as both a collector and transducer of microwave electromagnetic energy giving an output dc voltage signal proportional to power density. Results are described of experiments using Hall-effect devices in coaxial lines and free fields. These are co... | We assume a CDMA downlink multiuser scenario, where the base station is equipped with multiple transmit antennas, and each user has multiple receive antennas. For this setup we propose a new, computationally effective MIMO multiuser detector for frequency selective channels. We exploit the fact that the interference ma... | eng_Latn | 5,423 |
Fast, noise-free memory for photon synchronization at room temperature | Future quantum photonic networks require coherent optical memories for synchronizing quantum sources and gates of probabilistic nature. We demonstrate a fast ladder memory (FLAME) mapping the optical field onto the superposition between electronic orbitals of rubidium vapor. Employing a ladder level-system of orbital t... | In recent years, MIMO communication systems such as IMT-Advanced and LTE have been put into practical use. Since MIMO transmission has an advantage in use in the indoor multipath-rich environment, the accurate indoor MIMO channel model is required for evaluating the systems. In the indoor environment, it is known that ... | eng_Latn | 5,424 |
Evaluation of diversity gains for DVB-T systems | The requirements for future DVB-T/H networks demand that broadcasters design and deploy networks that provide ubiquitous reception in challenging indoors and other obstructed situations. It is essential that such networks are designed costeffectively and with minimized environmental impact. The EC funded project PLUTO ... | The problem of maximizing utility over the capacity region of the MIMO broadcast channel is addressed. While a direct solution is not possible, it is discussed how decomposition techniques can be used to find an optimum solution. Two decompositions are considered: A standard dual decomposition and a gradient projection... | eng_Latn | 5,425 |
Rate-2 Space-Time Block Code with Phase Rotation | The full rate and full diversity could be achieved by Rate-2 space-time block code,whereas the decoding complexity is proportional to the square of the modulation order.A rate-2 space time block code with phase rotation is proposed in order to reduce the decoding complexity.Part of the transmitted signals is rotated by... | In an earlier paper by the author the problem of determining the optimum symmetrical weighting factors for a video MTI radar was discussed. This paper extends this work so as to remove the symmetrical restriction from the problem. In addition, for a staggered pulse system, optimum times of transmission are determined. ... | eng_Latn | 5,426 |
Reducing the peak and average power for OFDM systems using QAM by constellation shaping | In this paper, we present a shell mapping scheme to reduce the peak and average power of orthogonal frequency division multiplexing (OFDM) signals using quadrature amplitude modulation (QAM) by constellation shaping. Our approach can be considered as an extension of the shell mapping technique introduced originally in ... | We present a novel technique for accurately estimating the proportions of packet losses arising from collisions and from other sources of loss (channel noise, hidden nodes etc). Our approach is robust, makes use of local station-level measurements and requires no message passing. The required measurements are available... | eng_Latn | 5,427 |
IP-based Signal Transmission System Application in Radio and Broadcast Network | In this paper,signal transmission requirement is listed in radio and televison netwrok,transmission system current situation and shortage are introduced firstly.And then,the characteristics and advantages of IP-based transmission system,including different carrying network and signal multepexing system are elaborated i... | A matrix Routh-approximant modelling procedure is proposed for a multi-input multi-output system characterized by a matrix transfer function G(s), where G(s) = B(s) A −1(s) and A(s) and B(s) are matrix polynomials in s. The associated time-domain modelling procedure is also discussed. Compared with three matrix Cauer c... | eng_Latn | 5,428 |
Tree structures for time-frequency signal analysis | The popular orthonormal decomposition techniques such as block transforms and filter banks for multiresolution signal representation are unified. Their comparative performance results based on signal energy compaction are presented for image and AR(1) sources. It is observed that the filter banks with computationally e... | This paper presents a kind of symbol synchronization based on cyclic prefix.This algorithm based on ML estimation algorithm,improve and simplifies symbol synchronization method in the operation,not only optimises the system in hardware resources, but also improves the performance of estimation.By simulating in Matlab a... | eng_Latn | 5,429 |
Experimental analysis of fibre non-linearity on second harmonic optical microwave radio-over-fibre system | In this study, the authors propose an optical microwave (MW) radio-over-fibre system in which an integrated dual-parallel Mach-Zehnder modulator (DP-MZM) is biased at the maximum transmission biasing point. A single drive Mach-Zehnder modulator, in series with the DP-MZM, is used to modulate the 1 GHz radio frequency d... | Often, the exact model of industrial processes turns out to be too complex for simulation and controller design. It is therefore mandatory to simplify the mathematical description of the process and/or the one of the controller. A particularly attractive simplification criterion is related to the minimization of the L ... | eng_Latn | 5,430 |
The Gaussian Many-Help-One Distributed Source Coding Problem | Jointly Gaussian memoryless sources are observed at N distinct terminals. The goal is to efficiently encode the observations in a distributed fashion so as to enable reconstruction of any one of the observations, say the first one, at the decoder subject to a quadratic fidelity criterion. Our main result is a precise c... | Based on the traditional adaptive multiuser detection method,sum up application of new LMS,RLS,Kalman arithmetics in DS-CDMA Multiuser detection.principles and methods of 3 arithmetics were given and emulation by Matlab.Based on comparing with SIR and errorcode of 3 arrthmetic,Kalman arithmetic show more excellent dete... | eng_Latn | 5,431 |
SLM and PTS peak-power reduction of OFDM signals without side information | Selected mapping (SLM) and partial transmit sequence ::: (PTS) are well-known techniques for peak-power reduction ::: in orthogonal frequency-division multiplexing (OFDM). We ::: derive a simplified maximum likelihood (ML) decoder for SLM ::: and PTS that operates without side information. This decoder ::: exploits the... | This paper addresses the problem of channel and propagation delay estimation in asynchronous DS/CDMA systems. We consider the uplink connection in DS/CDMA with long spreading codes. The MIMO stochastic gradient algorithm proposed in [6] is estimating a linear combination of the channel impulse responses and the propaga... | eng_Latn | 5,432 |
A new joint iterative detecting algorithm in high-order modulation MIMO systems | This article imports an improved multistage sphere decoding (IMSD) algorithm into the MMSE-PIC iterative structure and proposes a new joint iterative detecting structure in high order modulation MIMO systems. The IMSD algorithm is designed against the higher-order modulation system with lower complexity and near SD per... | This paper studies the secure multiterminal source coding problem with actions. In particular, one main encoder observes an independent and identically distributed (i.i.d.) source Xn and wishes to compress this source lossyly to the decoder. Another encoder observes the source Yn and wants to compress this source lossl... | eng_Latn | 5,433 |
Performance evaluation of downlink LTE system with QPP interleaver for channel encoder | The design of the LTE physical layer (PHY) is heavily influenced by the requirements for high peak transmission rate (100 Mbps DL/50 Mbps UL), spectral efficiency and multiple channel bandwidths (1.25–20 MHz). Unfortunately, the existing WCDMA turbo interleaver does not permit an efficient high throughput implementatio... | We propose an embarrassingly parallel, memory ecient inference algorithm for latent variable models in which the complete data likelihood is in the exponential family. The algorithm is a stochastic cellular automaton and converges to a valid maximum a posteriori fixed point. Applied to latent Dirichlet allocation we fi... | eng_Latn | 5,434 |
Chromatin Immunoprecipitation (ChIP) Analysis of Protein-DNA Interactions. | Here we describe chromatin immunoprecipitation (ChIP), a molecular approach that uses formaldehyde cross-linking to investigate genome structure and function. This approach allows us to determine the distribution of histone modifications (e.g., acetylation, methylation), the deposition of histone variants (H2AZ, H3.3, ... | In practical systems, due to the time-varying radio channel, the channel state information (CSI) may not be known well at both transmitters and receivers. For most of the current multiuser multiple-input multiple-output (MIMO) schemes, they suffer a significant degression on the performance due to the mismatch between ... | kor_Hang | 5,435 |
Improved GA solution on LNC coefficient matrix for multi-user cooperative communication | Cooperative communication with network coding can yield higher system diversity gain and improve the efficiency of cooperation, for which designing the proper and efficient coding coefficients is one key technique for implementation. The important contributions of our work reveal the existence of coding coefficient mat... | The authors would like to thank the helpful suggestions and ::: comments from the Editor, the Associate Editor, and the ::: Reviewers. The authors are also grateful to Karen J. Duncan ::: for her contribution in the language revision. The first ::: author’s work has been partially supported by the Spanish ::: National ... | eng_Latn | 5,436 |
Dynamical Casimir Effect with Semi-Transparent Mirrors, and Cosmology | After reviewing some essential features of the Casimir effect and, specifically, of its regularization by zeta function and Hadamard methods, we consider the dynamical Casimir effect (or Fulling–Davies theory), where related regularization problems appear, with a view to an experimental verification of this theory. We ... | In this paper we propose a compressive channel estimation for fast fading channel in orthogonal frequency division multiplexing (OFDM) systems. We formulate the sparse compressive sensing (CS) problem by exploiting the delay-Doppler sparse structure of the doubly dispersive channel. To combat the severe inter-carrier i... | eng_Latn | 5,437 |
Frequency-Domain Hammerstein Self-Interference Canceller for In-Band Full-Duplex OFDM Systems | Practical, real-time, full duplex wireless | Effective injury forecasting in soccer with GPS training data and machine learning | eng_Latn | 5,438 |
Electromagnetic Lens-Focusing Antenna Enabled Massive MIMO: Performance Improvement and Cost Reduction | Joint Tx-Rx beamforming design for multicarrier MIMO channels: a unified framework for convex optimization | Quality of life, functioning and cognition in bipolar disorder and major depression: A latent profile analysis | eng_Latn | 5,439 |
Replacement of a Single-Channel with a Multichannel Cochlear Implant as an Upgrade | The removal of a functioning cochlear implant in order to upgrade to a more advanced device is a critical issue to many otologists, since we currently have no means to predict the results preoperatively. This paper reports on two patients who successfully upgraded from a single-channel to a multichannel implant. The ne... | In this paper, a new method is proposed to adaptively estimate the number of transmit antennas in cognitive radios and surveillance systems. It employs Schur complement to test the linearly independence of the new coming data with the previous data set. ?2 test is conducted based on the statistics of Schur complement v... | eng_Latn | 5,440 |
Performance Analysis and Implementation of Array Multiplier using various Full Adder Designs for DSP Applications: A VLSI Based Approach | Multipliers are the significant arithmetic units which are used in various VLSI and DSP applications. Besides their crucial necessity, Multipliers are also a main source for power dissipation. Hence prior importance must be given to lessen power dissipation in order to satisfy the overall power budget for various digit... | In vector four-wave mixing, one or two strong pump waves drive two weak signal and idler waves, each of which has two polarization components. In this paper, vector four-wave mixing processes in a randomly-birefringent fiber (modulation interaction, phase conjugation and Bragg scattering) are studied in detail. For eac... | eng_Latn | 5,441 |
Transmission of ultrashort coherent pulses through the ionosphere | A study is made of scattering and absorption of ultrashort coherent radiation pulses when they pass through an electron gas, such as occurs in the ionised upper layers of the atmosphere. | This work describes a method for providing robustness to errors from a binary symmetric channel for the SPIHT image compression. The source rate and channel rate are jointly optimized by a stream of fixed-size channel packets. Punctured turbo codes are used for the channel coding, providing stronger error protection th... | eng_Latn | 5,442 |
Influence of Asphyxia on Reciprocal Innervation | In cats whose spinal cords had been asphyxiated for various periods of time, van Harreveld and Marmont1 found that after recovery the hind legs could show an exaggerated extensor tone which usually stayed until death (in some experiments 3 weeks in total). Considering that after this time the acute effect of asphyxia w... | Channel estimation is an essential component, in which channel state information playing very important role in wireless communications. But acquiring CSI in practice is a challenging issue for massive MIMO systems. To reduce the over burden for obtaining channel impulse response of huge Multi input multi output system... | eng_Latn | 5,443 |
Quantum particle swarm evolutionary algorithm with application to system identification | Based on quantum evolutionary algorithm and particle swarm optimization, a quantum particle swarm evolutionary algorithm is proposed. In this algorithm, quantum angle is used to represent the qubit, a new method learning from the idea of particle swarm algorithm is presented to determine rotation angle, He gate is take... | The design of the LTE physical layer (PHY) is heavily influenced by the requirements for high peak transmission rate (100 Mbps DL/50 Mbps UL), spectral efficiency and multiple channel bandwidths (1.25–20 MHz). Unfortunately, the existing WCDMA turbo interleaver does not permit an efficient high throughput implementatio... | eng_Latn | 5,444 |
Reproducibility of resting metabolic rate measurement in children | The aim of the present study was to determine the reproducibility of measurement of resting metabolic rate (RMR) using a ventilated-hood indirect calorimeter in children using a short protocol suitable for the outpatient setting or home visit. The protocol consisted of an overnight (10-12 h) fast, 5-10 min supine rest,... | Channel estimation is an essential component, in which channel state information playing very important role in wireless communications. But acquiring CSI in practice is a challenging issue for massive MIMO systems. To reduce the over burden for obtaining channel impulse response of huge Multi input multi output system... | eng_Latn | 5,445 |
Radiometric definitions for partially coherent sources | New generalizations of the basic radiometric concepts of radiance, radiant emittance, and radiant intensity to fields generated by a two-dimensional stationary partially coherent source are made. It is explicitly shown how they are related to the cross-spectral density of the source. Such new definitions are consistent... | The performance of a pragmatic carrier phase estimation algorithm is evaluated over a range of SNRs. The optimal SNR regions for MQAM are compared to an AWGN channel observing gains of up to 40% in throughput. | eng_Latn | 5,446 |
Clinical value of serum and urine κ /λ light chain in diagnosis of multiple myeloma | Objective To investigate the clinical value of serum and urine κ /λ light chain in diagnosis of multiple myeloma( MM). Methods A total of 66 MM patients and 30 healthy controls were enrolled in this study. The levels of serum and urine κ/λ light chain were measured by rate nephelometry. The sensitivity and specificity ... | In recent years, MIMO communication systems such as IMT-Advanced and LTE have been put into practical use. Since MIMO transmission has an advantage in use in the indoor multipath-rich environment, the accurate indoor MIMO channel model is required for evaluating the systems. In the indoor environment, it is known that ... | eng_Latn | 5,447 |
Ways to strengthen the weak spread spectrum signal to cancel a strong signal | (57) The invention provides a method for enhancing the tracking capability of the strong signal interference determined weak signal in the CDMA coded spread spectrum radio signal to the received weak signal including the intensity signal. A two signals modulation code is known to predict the weak signal. For strong sig... | We consider the MIMO wiretap channel, that is a MIMO broadcast channel where the transmitter sends some confidential information to one user which is a legitimate receiver, while the other user is an eavesdropper. Perfect secrecy is achieved when the transmitter and the legitimate receiver can communicate at some posit... | eng_Latn | 5,448 |
15MHz wide tuning-range OTA with −69dBHD3 and its application to Gm-C filter | This paper presents a high linearity operational transconductance amplifier (OTA). The OTA circuit combines the techniques of the double differential pairs (DDP) and Source-degenerated current mirrors to achieve high linearity in a large GM tuning range. With the Gm values ranged from 60µS to 130µS, the HD3 of the OTA ... | We consider the MIMO wiretap channel, that is a MIMO broadcast channel where the transmitter sends some confidential information to one user which is a legitimate receiver, while the other user is an eavesdropper. Perfect secrecy is achieved when the transmitter and the legitimate receiver can communicate at some posit... | eng_Latn | 5,449 |
Neural Networks with Limited Precision Weights and Its Application in Embedded Systems | A type of optimized neural networks with limited precision weights (LPWNN) is presented in this paper. Such neural networks, which require less memory for storing the weights and less expensive floating point units in order to perform the computations involved, are better suited for embedded systems implementation than... | In this paper the least squares problem of signal estimation is introduced. The Code-Division Multiple Access (CDMA) signal model is transformed into a least squares minimization form. Based on the solutions of the problem, different receiver structures are derived. Channel estimation using least-squares method is also... | eng_Latn | 5,450 |
A linearized second-order finite difference scheme for time fractional generalized BBM equation | Abstract In this paper, we consider the generalized Benjamin–Bona–Mahony (BBM) equation with a fractional order derivative in time. By introducing a weighted approach and basing on the L 2 - 1 σ formula, a linearized finite difference scheme is proposed to solve the nonlinear problem. The scheme is shown to be uncondit... | Deterministic network calculus (DNC) is not suitable for deriving performance guarantees for wireless networks due to their inherently random behaviors. In this paper, we develop a method for Quality of Service (QoS) analysis of wireless channels subject to Rayleigh fading based on stochastic network calculus. We provi... | eng_Latn | 5,451 |
Characterization of the optimum transmitter correlation matrix for MIMO with antenna subset selection | We give a simple and complete characterization of the optimum transmitter correlation matrix for multiple-input-multiple-output (MIMO) systems, when antenna subset selection is used. It is assumed that the receiver feeds back to the transmitter only the selected set of antennas without providing any kind of rank orderi... | Based on the analyses of the interferential multispectral imagery(IMI), a new compression algorithm based on ::: distributed source coding is proposed. There are apparent push motions between the IMI sequences, the relative shift ::: between two images is detected by the block match algorithm at the encoder. Our algori... | eng_Latn | 5,452 |
Preliminary Simulation Study of Doppler Reflectometry | A preliminary simulation study of Doppler reflectometry is performed. The simulations solve Maxwell's equations by a finite difference time domain (FDTD) code method in two dimensions. A moving corrugated metal target is used as a plasma cutoff layer to study the basic features of Doppler reflectometry. We examined the... | We assume a CDMA downlink multiuser scenario, where the base station is equipped with multiple transmit antennas, and each user has multiple receive antennas. For this setup we propose a new, computationally effective MIMO multiuser detector for frequency selective channels. We exploit the fact that the interference ma... | kor_Hang | 5,453 |
Improved vacuum assist for a brake booster | An apparatus and a method for providing an increased negative pressure to a brake booster of a brake system under certain operating conditions. A negative pressure is stored in a reservoir and is released controlled under conditions in which the brake booster negative pressure level is less than the predetermined vacuu... | In this work we have applied Adapive Boosting (AdaBoost) for channel estimation of Orthogonal Frequency Division Multiplexing (OFDM) systems. The result of the AdaBoost algorithm was compared with other algorithms such Least Square (LS), Best Linear Unbiased Estimator (BLUE) and Minimum Mean Square Error (MMSE). | eng_Latn | 5,454 |
Short communication Anxious apprehension increases coupling of delta and beta oscillations | Recent findings showing that anxiety is associated with enhanced coupling of EEG rhythms imply higher information exchange between populations of neurons associated with different oscillatory systems. In this study, influence of uncertainty on alpha–delta anticorrelation and delta–beta coupling was studied in 39 subjec... | Selected mapping (SLM) and partial transmit sequence ::: (PTS) are well-known techniques for peak-power reduction ::: in orthogonal frequency-division multiplexing (OFDM). We ::: derive a simplified maximum likelihood (ML) decoder for SLM ::: and PTS that operates without side information. This decoder ::: exploits the... | eng_Latn | 5,455 |
ICI analysis for FRFT-OFDM systems in doubly selective fading channels | Frequency offset affects the performance of orthogonal frequency division multiplexing system. The FRFT based OFDM is considered in this article to minimize this affect. The expressions of signal to interference ratio (SIR) due to inter carrier interference (ICI) has been derived for frequency selective fading channel ... | The author attempts to show how the generation and compression of complementary codes can be based on a specific single-input-multiple-output FIR (finite impulse response) digital filter structure. Driving this filter with a unit pulse yields both the code and its complement as the response simultaneously. A decoder is... | eng_Latn | 5,456 |
Analytical Model for GNSS Receiver Implementation Losses | Global Navigation Satellite System (GNSS) receivers suffer signal-to-noise ratio (SNR) losses due to bandlimiting, quantization, and sampling. This paper presents an analytical model for GNSS receiver losses applicable to a wide variety of hardware configurations. The model addresses digitization of the received signal... | This paper addresses the problem of channel and propagation delay estimation in asynchronous DS/CDMA systems. We consider the uplink connection in DS/CDMA with long spreading codes. The MIMO stochastic gradient algorithm proposed in [6] is estimating a linear combination of the channel impulse responses and the propaga... | eng_Latn | 5,457 |
Cooperative trajectory planning for multi-UCAV using multiple traveling salesman problem | This paper studied the problem of cooperative trajectory planning integrated target assignment for multiple unmanned combat aerial vehicles, servicing multiple targets. The problem is formulated as a dynamics-constrained, multiple depot, multiple traveling salesman problem with neighborhoods (DC_MDMTSPN), which is a va... | AVS-M isthemostrecent videocodingstandard developed bytheAudioandVideoCodingStandard Workgroup ofChina(AVS), whichpromises improved performance close toH.264/AVC withlower complexity. Inthis paper, complexity isestimated formacroblockbased AVS-MJiben profile decoder based ontheoretical analysis andextensive experiments... | eng_Latn | 5,458 |
Long noncoding RNAs: a potential novel class of cancer biomarkers | Long noncoding RNAs (lncRNAs) are a novel class of RNA molecules defined as transcripts longer than 200 nucleotides that lack protein coding potential. They constitute a major, but still poorly characterized part of human transcriptome, however evidence is growing that they are important regulatory molecules involved i... | In cloud radio access networks (C-RANs), the baseband processing of the available macro- or pico/femto-base stations (BSs) is migrated to control units, each of which manages a subset of BS antennas. The centralized information processing at the control units enables effective interference management. The main roadbloc... | eng_Latn | 5,459 |
Random Central Limit Theorem for Kernel Estimators of Density | Using the theory of character function,we derived the random central limit theorem for kernel estimators of density,then we obtained the convergence rate of central limit theorem by using the Berry-Esseen estimator.Moreover,we give two examples. | Based on the traditional adaptive multiuser detection method,sum up application of new LMS,RLS,Kalman arithmetics in DS-CDMA Multiuser detection.principles and methods of 3 arithmetics were given and emulation by Matlab.Based on comparing with SIR and errorcode of 3 arrthmetic,Kalman arithmetic show more excellent dete... | eng_Latn | 5,460 |
Mach-Zehnder Mode/Wavelength (De)Multiplexer for WDM/MDM Optical Transmission | 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. | This paper studies the secure multiterminal source coding problem with actions. In particular, one main encoder observes an independent and identically distributed (i.i.d.) source Xn and wishes to compress this source lossyly to the decoder. Another encoder observes the source Yn and wants to compress this source lossl... | eng_Latn | 5,461 |
1 MAC layer channel quality measurement in 802.11 | We present a novel technique for accurately estimating the proportions of packet losses arising from collisions and from other sources of loss (channel noise, hidden nodes etc). Our approach is robust, makes use of local station-level measurements and requires no message passing. The required measurements are available... | Ultra wide band (UWB) impulse radio (IR) technology calls for robust and low-complexity receiver techniques. State-of-the-art proposals are both coherent ML receivers, noncoherent transmitted reference systems, or hybrid choices, all of which are derived from an AWGN model. In this paper we investigate an alternative t... | eng_Latn | 5,462 |
Cutaneous color sensitivity: explanation and demonstration. | Past reports that humans can, in complete darkness, sense with their fingers the colors objects would have if illuminated, have understandably been received with skepticism. A previously proposed hypothesis, based on differential rate of absorption of infrared radiation by different layers of the skin, is inconsistent ... | We consider a power control scheme for maximizing the information capacity of the uplink in single-cell multiuser communications with frequency-flat fading, under the assumption that the users attenuations are measured perfectly. Its main characteristics are that only one user transmits over the entire bandwidth at any... | eng_Latn | 5,463 |
Optimal damping in multilayer sandwich beams | We describe some possible models for a multilayer sandwich beam consisting of alternating stiff and compliant beam layers. The stiff layers are modeled under Euler-Bernoulli assumptions while the compliant layers essentially only carry the shear. We include viscous damping in the compliant layers and consider the optim... | In this paper we develop closed-form approximations for the coded BER in bit-interleaved coded modulation (BICM) transmission over Rayleigh fading channels. To obtain the desired expressions we apply the so-called saddle point approximation and use analytical forms of the probability density functions (PDF) of the reli... | eng_Latn | 5,464 |
Regulation of receptor tyrosine kinases by miRNA: overexpression of miRNA using lentiviral inducible expression vectors. | MicroRNAs have the ability to alter and regulate multiple genes, including RTK family members, making them an attractive approach for molecular therapeutic development. We use a pCDNA6.2-EmGFP-microRNA expression vector to overexpress individual mature microRNA and then transfer the expression cassette into a single, i... | In this paper, blind equalization of short burst signals is formulated with the twin support vector regressor (TSVR) framework. The proposed algorithm combine the conventional cost function of TSVR with classical error function applied to blind equalization: the Godard's error function that describes the relationship b... | eng_Latn | 5,465 |
Quasipotential equation in terms of rapidities and applications to relativistic bound-state and scattering problems | The review is devoted to an approach to the relativistic two-body problem in which a key role is played by the rapidity, the variable canonically conjugate to the relativistic relative distance. For a large class of quasipotentials, the analytic properties of the amplitude and wave function in the rapidity (energy) and... | The design of the LTE physical layer (PHY) is heavily influenced by the requirements for high peak transmission rate (100 Mbps DL/50 Mbps UL), spectral efficiency and multiple channel bandwidths (1.25–20 MHz). Unfortunately, the existing WCDMA turbo interleaver does not permit an efficient high throughput implementatio... | eng_Latn | 5,466 |
A Symbols Detection Algorithm of MIMO Systems Based on Information Propagation | Symbols detection algorithm of multiple-input multiple-output (MIMO) systems based on information propagation is proposed. First MMSE method is adopted for equalization then based on the equalized soft information, according to the signal-interference-noise ratio of the signal received by the antennas, taking individua... | In an earlier paper by the author the problem of determining the optimum symmetrical weighting factors for a video MTI radar was discussed. This paper extends this work so as to remove the symmetrical restriction from the problem. In addition, for a staggered pulse system, optimum times of transmission are determined. ... | kor_Hang | 5,467 |
Performance Analysis and Comparison of Various Channel Decoding Techniques | Channel encoding and decoding are performed to remove the influence of the channel on the transmitted data that result bits in error. Some redundant bits are added with the original data to mitigate the effect of error. Various channel coding/decoding techniques are used for error correction and detection. This paper p... | Abstract Many operations on strings of length n can be speeded up by a factor of p using p processors. String operations can also be speeded up, even when a single processor is used, by compactly encoding the strings, e.g. using run length code. This paper shows how to combine these two approaches by using p processors... | eng_Latn | 5,468 |
A hybrid method for wave propagation from a localized source, with application to mountain waves | Wave propagation from a localized source into a non-uniform medium is analysed using a hybrid method. This consists of an integral representation in the near-field and a numerical ray tracing in the far-field. The ray tracing includes the calculation of wave-action density and is initialized from the stationary-phase a... | MIMO-OFDM is a promising technique for broadband communications over mobile wireless channel. In this paper, we investigate the channel estimation problem for MIMO-OFDM systems. We proposed a novel EM (expectation maximization)-based channel estimation method. This proposed method employs the poly-nomial channel model ... | eng_Latn | 5,469 |
Ankle Impingement: Combined Anterior and Posterior Impingement Syndrome of the Ankle | Background: Simultaneous anterior and posterior ankle impingement has not been previously reported. We identified 62 patients with both anterior and posterior impingement and report the results of ... | An OFDM system may be a good candidate for a next-generation wireless communication system which requires high-speed and high-rate data transmission. In OFDM systems, guard intervals are inserted to mitigate the effects of ISI (Inter-Symbol Interference). But guard interval insertion degrades the system performance fro... | eng_Latn | 5,470 |
High Rate CPFSK Space-Time Trellis Codes | Space-time trellis coding is an established diversity technique that reduces the effects of multipath fading over wireless communication channels. Here, we consider high rate space-time trellis codes (STTC) with continuous phase frequency shift keying (CPFSK). We present optimized rate-2/3 STTC implemented with 3 trans... | Key message ::: Physical interaction and phosphorylation by CaMPK9 protects the degradation of CaWRKY40 that induces resistance response in chickpea to Fusarium wilt disease by modulating the transcription of defense responsive genes. | eng_Latn | 5,471 |
Detection and Printability of Shifter Defects in Phase-Shifting Masks : Photolithography | Because of the high printability of shifter defects in phase-shifting masks, it is worthwhile to characterize the inspection and printing of the shifter defects. The detectability and printability of shifter defects as a function of size and location have been investigated by experiments and simulation. A test mask wit... | Selected mapping (SLM) and partial transmit sequence ::: (PTS) are well-known techniques for peak-power reduction ::: in orthogonal frequency-division multiplexing (OFDM). We ::: derive a simplified maximum likelihood (ML) decoder for SLM ::: and PTS that operates without side information. This decoder ::: exploits the... | eng_Latn | 5,472 |
Adaptive Power Allocation for Multihop Regenerative Relaying With Limited Feedback | A multihop regenerative relay system is considered. We explore adaptive power allocation (PA) under a total power constraint to minimize the system error probability when the perfect channel state information (CSI) is known at the transmitters. We propose adaptive PA schemes with limited feedback when the transmitters ... | This paper addresses the problem of channel and propagation delay estimation in asynchronous DS/CDMA systems. We consider the uplink connection in DS/CDMA with long spreading codes. The MIMO stochastic gradient algorithm proposed in [6] is estimating a linear combination of the channel impulse responses and the propaga... | eng_Latn | 5,473 |
A Study on The Capacity of Massive MIMO System with The Aid of MATLAB Simulink | Today’s main focus of the emerging cellular technologies is to fulfill users high demand while fully utilizing available resources. Massive MIMO is expected to play a vital role in this development, such as 5G, as it results in noticeably better performance, against the cost of needing more hardware components. This ... | This paper deals with the problem of state estimation for perturbed output nonlinear systems. A multiple models approach is used to describe such class of systems. Then a structure of Lyapunov based sliding mode multiple observer is presented. The stability proof of the observer is ensured by a suitable choice of estim... | eng_Latn | 5,474 |
An efficient encoder for distributed real-time applications | Standard basic encoding rules are too elaborate and inefficient for distributed real-time applications. Two major obstacles encountered are long protocol data units and slow encoding times. The problem of encoding for real-time applications is addressed. Taking Fieldbus as a representative of real-time networks, it is ... | We present a symbol synchronization scheme using wavelets that completely eliminates the pattern-dependent jitter. This is achieved by obtaining the optimal pre-filter using a particular linear combination of the wavelet and its translates. We further investigate synchronization schemes for the case where both the scal... | eng_Latn | 5,475 |
Performance impact of pilot tone randomization to mitigate OFDM jamming attacks | Orthogonal Frequency Division Multiplexing (OFDM) uses pilot tones to estimate and equalize the channel's frequency response whose locations and values are known. This makes OFDM prone to pilot tone based jamming attacks. Our previous research analyzed such jamming attacks. This paper builds on this idea and proposes a... | In an earlier paper by the author the problem of determining the optimum symmetrical weighting factors for a video MTI radar was discussed. This paper extends this work so as to remove the symmetrical restriction from the problem. In addition, for a staggered pulse system, optimum times of transmission are determined. ... | eng_Latn | 5,476 |
Practicalities of Learning Modules Course of Culinary Nutrition Problem Oriented Lazy Learning (PBL) Nutrition for Students in the Stikes Perintis Padang | learning modules oriented Problem Based Learning (PBL) is a module that can increase the activity of learning to train students to find authentic problems, gather information to solve the problem. This study aims to produce learning modules Oriented Problem Based Learning (PBL) is valid, practical and effective.kind Th... | Selected mapping (SLM) and partial transmit sequence ::: (PTS) are well-known techniques for peak-power reduction ::: in orthogonal frequency-division multiplexing (OFDM). We ::: derive a simplified maximum likelihood (ML) decoder for SLM ::: and PTS that operates without side information. This decoder ::: exploits the... | eng_Latn | 5,477 |
A joint error correction and ICI cancellation algorithm for OFDM systems | Orthogonal Frequency Division Multiplexing (OFDM) is a spectrally efficient and robust digital communication technique adopted by the newly developed Wireless Communication standards. Frequency offset errors due to Doppler shifts disturbs the alignment of the orthogonal subcarriers and causes them to overlap with each ... | Abstract A numerical scheme, based upon the Kobayashi-Tranter method with certain modifications, is given for axisymmetric punch and crack problems in elasticity. The problems are reduced to solving a system of linear algebraic equations instead of a Fredholm integral equation of the second kind. A standard program thu... | eng_Latn | 5,478 |
Self-Coherent Systems for Short Reach Transmission | We review self-coherent receiver schemes that enable >100 Gb/s per-wavelength transmission over ∼100 km of fiber. We discuss in detail recent progress on Kramers-Kronig receivers. | *† This paper presents a new technique to design a col lision avoidance maneuver when a conjunction analysis indicates that the probability of collision is above a certain threshold. This technique makes use of the Aerospace Corporation designed NLP2 algorithm to numerically design a minimal delta-V maneuver to reduce ... | eng_Latn | 5,479 |
A study on SNR estimation algorithms for channel state estimation in Communication Satellite Systems employing Fade Mitigation Techniques | Channel state estimation is one of the key processes carried out at the physical layer of Satellite Systems employing Fade Mitigation Techniques such as Adaptive Coding and Modulation ACM. An accurate and reliable channel estimate is needed to fully realize the capacity gains accrued by using ACM. In this paper the SNR... | Rapid transfer alignment has strict demands for filtering accuracy and convergent velocity,but alignment accuracy is seriously degraded if there exist outliers in measurements.A novel approach to reject outliers is proposed,a small sequence sampled online makes up of a new sequence by forward symmetry extension,which i... | eng_Latn | 5,480 |
Residue-residue contacts: application to analysis of secondary structure interactions. | Protein structures and their complexes are formed and stabilized by interactions, both inside and outside of the protein. Analysis of such interactions helps in understanding different levels of structures (secondary, super-secondary, and oligomeric states). It can also assist molecular biologists in understanding stru... | We assume a CDMA downlink multiuser scenario, where the base station is equipped with multiple transmit antennas, and each user has multiple receive antennas. For this setup we propose a new, computationally effective MIMO multiuser detector for frequency selective channels. We exploit the fact that the interference ma... | eng_Latn | 5,481 |
Exact Solitary Wave Solutions for a Class of BBM Systems | Exact solitary wave solutions for a class of strongly coupled BBM systems are investigated.To find an explicit solitary wave solution of the system,it is sufficient to find a solution of an ordinary differential equation.For a specified form of solutions,the solution of the ordinary differential equation can be found b... | Based on the traditional adaptive multiuser detection method,sum up application of new LMS,RLS,Kalman arithmetics in DS-CDMA Multiuser detection.principles and methods of 3 arithmetics were given and emulation by Matlab.Based on comparing with SIR and errorcode of 3 arrthmetic,Kalman arithmetic show more excellent dete... | eng_Latn | 5,482 |
Comparing two linguistic phenomena of peacock spreading its tail and the head of lion with its small tail from the Perspective of Thinking Mode | This paper,describing two natural phenomena of peacock spreading its tail and the head of lion with its small tail,explores these two equivalent linguistic phenomena from the perspective of thinking mode. | Selected mapping (SLM) and partial transmit sequence ::: (PTS) are well-known techniques for peak-power reduction ::: in orthogonal frequency-division multiplexing (OFDM). We ::: derive a simplified maximum likelihood (ML) decoder for SLM ::: and PTS that operates without side information. This decoder ::: exploits the... | eng_Latn | 5,483 |
The mutual coherence of simultaneously injection-locked laser diode arrays | The modulus of the mutual coherence function, {vert bar}g{sub 12}({tau}){vert bar}, has been measured for two physically separated laser diode arrays that were simultaneously injection locked to the same master laser. The measured value {vert bar}g{sub 12}({tau}){vert bar} = 0.96 {plus minus} 0.06, is close to ideal. 2... | We present a practical coded cooperative jamming scheme for the problem of secure communications over the two-way wiretap channel. We design low-density parity-check (LDPC) based codes whose codewords interfere at the eavesdropper's terminal, thus providing secrecy. We show that our scheme can guarantee low information... | eng_Latn | 5,484 |
SIZE-INDUCED DIFFUSE PHASE TRANSITION IN THE NANOCRYSTALLINE FERROELECTRICPBTIO3 | We report a detailed study of the size dependence of the ferroelectric transition in an ensemble of ${\mathrm{PbTiO}}_{3}$ nanoparticles produced by coprecipitation. The phase transition was monitored by dielectric measurements, variable temperature x-ray diffraction, and differential scanning calorimetry (DSC). Size e... | In soliton communication systems, the continuous nonlinear spectrum, ideally zero, is conventionally ignored at the receiver. In this paper, we exploit correlation between the received continuous spectrum and perturbations of the discrete soliton eigenvalue. We propose four estimation schemes, classified into two categ... | yue_Hant | 5,485 |
A downlink multi-stream modulation coding mode selection and power load method | This invention relates to a method for selecting down multi-flow modulation coding mode and loading power including the following steps: under the mode of single-user MIMO, the maximum data-flow of channel quality identification selects a modulation code mode of the flow according to its channel quality identification ... | The way to renovate the inlet/outlet differential pressure interlock protection on the boiler circulating water pump of 300 MW unit in Mawan Power Plant was discussed,as well as the effect of usage. Some approaches to extend the usage of DCS were provided. | eng_Latn | 5,486 |
Two-stage interference-resistant adaptive periodically time-varying CMA blind equalization | We consider the problem of blindly equalizing a digital communication signal distorted by a linear time-invariant channel and contaminated by severe co-channel or adjacent-channel digital interference under the assumption that the latter exhibits a different symbol rate from the desired signal. The proposed equalizer i... | Abstract Asymmetric total synthesis of small ring macrolide stagonolide-E has been described in this communication. The main highlight of our synthetic strategy is the application of ME-DKR (metal enzyme combo dynamic kinetic resolution) reaction, asymmetric reduction with Noyori’s BINAL-H reagent system, stereoselecti... | eng_Latn | 5,487 |
Study of turbulent characteristics of flow around island in a braided river model using quadrant technique | AbstractTurbulent flow characteristics around the braid bar are not thoroughly studied till now. In the current paper, the quadrant method is used to analyze the turbulence characteristics of flow around the island in a braided river model. An attempt has been made herein to relate the depositional characteristics arou... | We consider the throughput performance of ARQ in interfering channels, where the signal of interest as well as the interferers are subject to independent distributed Nakagami-m block fading. The key contribution is the derivation of closedform expressions for the rate-maximized throughput. For this purpose, we employ t... | eng_Latn | 5,488 |
On the Shannon cipher system with a wiretapper guessing subject to distortion and reliability requirements | We modify the problem studied by Merhav and Arikan (see IEEE Trans. Inform. Theory, vol.45, no.6, p.1860-6, 1999) of discrete memoryless source encrypted messages guessing by wiretapper within given distortion level /spl Delta/ in the case of Shannon cipher system. The security of the system is measured by the expected... | In this paper, a new method is proposed to adaptively estimate the number of transmit antennas in cognitive radios and surveillance systems. It employs Schur complement to test the linearly independence of the new coming data with the previous data set. ?2 test is conducted based on the statistics of Schur complement v... | eng_Latn | 5,489 |
Novel EM-Based Channel Estimation Algorithm for MIMO-OFDM Systems | MIMO-OFDM is a promising technique for broadband communications over mobile wireless channel. In this paper, we investigate the channel estimation problem for MIMO-OFDM systems. We proposed a novel EM (expectation maximization)-based channel estimation method. This proposed method employs the poly-nomial channel model ... | In this article we describe a global design approach of an X-band Tx/Rx module which, by means of a Multi Chip Module (MCM) technique, includes in a single package the different microwave functions (4-bit phase-shifter, low-noise amplifier, power amplifier, switching control circuits), the thin film interconnections, t... | eng_Latn | 5,490 |
Stochastic analysis of stereo quantization error | The probability density function of the range estimation error and the expected value of the range error magnitude are derived in terms of the various design parameters of a stereo imaging system. In addition, the relative range error is proposed as a better way of quantifying the range resolution of a stereo imaging s... | We assume a CDMA downlink multiuser scenario, where the base station is equipped with multiple transmit antennas, and each user has multiple receive antennas. For this setup we propose a new, computationally effective MIMO multiuser detector for frequency selective channels. We exploit the fact that the interference ma... | eng_Latn | 5,491 |
Time-Reversal Methods in Acousto-Elastodynamics | The aim of the article is to solve an inverse problem in order to determine the presence and some properties of an elastic “inclusion” (an unknown object, characterized by elastic properties discriminant from the surrounding medium) from partial observations of acoustic waves, scattered by the inclusion. The method wil... | In this paper we study the performance of IEEE 802.11e enhanced distributed channel access (EDCA) priority schemes under finite load and error-prone channel. We introduce a multi-dimensional Markov Chain model that includes all the mandatory differentiation mechanisms of the standard: QoS parameters, CWMIN, CWMAX arbit... | eng_Latn | 5,492 |
MMSE multiuser detection for noncoherent non-orthogonal multipulse modulation | We present the minimum mean squared error multiuser detector for noncoherent detection of non-orthogonal multipulse modulation. The detector is analyzed in the large signal-to-noise ratio regime and it is shown that the MMSE detector approaches a new multiple access interference suppressing detector, termed the multipu... | In order to compute an optimal Kernel probability density function estimator (KDE), the plug-in method is considered in this paper. Such algorithm gives a way to optimize both the kernel and the bandwidth. Here, we propose a new procedure witch is faster than the common plug-in one. For each time, a factor J(f), which ... | eng_Latn | 5,493 |
Two Dimensional Wavelet Transform Model for OFDM System | In this paper, a proposed structure was suggested by replacing the blocks of the fast Haar Wavelet Transform (WT) with a two dimensional wavelet transform at the transmitter and the receiver sides in the Orthogonal Frequency Division Multiplexing (OFDM) model. This can be done by converting a 1-Dimensional vector into ... | A weightedL2 norm is introduced in which Markov operators, e.g., associated with noisy maps, are contracting provided the kernel (i.e., the transitional distribution) is smooth enough. This results in strong relaxational properties of noisy maps. Similar to this norm, integral functionals appear useful when studying sp... | yue_Hant | 5,494 |
Mean-square consensus of discrete-time multi-agent systems with Markovian switching topologies and persistent disturbances | This article deals with the leader-following mean-square consensus problem of discrete-time general linear multi-agent systems with Markovian switching topologies and persistent disturbances. Assume that the communication topology is not connected at any time but the union topology is connected. First, the estimators a... | The point process, a sequence of random univariate random variables derived from correlated ::: bivariate random variables as modeled by Arnold and Strauss, has been examined. Statistical ::: properties of the time intervals between the points as well as the probability distributions of the ::: number of points registe... | eng_Latn | 5,495 |
High rate single substrate polymer etching for multi- chip-modules (MCM) and off-chip-interconnect applications | Abstract The paper reports on work performed on MCM technology using polyimide as dielectric material which is being patterned by means of a dry etching technique. The main requirements for the patterning step are high rate and steep profiles. This can be achieved using low frequency plasma generation (25 kHz) which re... | MIMO-OFDM is a promising technique for broadband communications over mobile wireless channel. In this paper, we investigate the channel estimation problem for MIMO-OFDM systems. We proposed a novel EM (expectation maximization)-based channel estimation method. This proposed method employs the poly-nomial channel model ... | eng_Latn | 5,496 |
N‐Dimensional Partially Coherent Detection of an Accelerating Source | This article contains a discussion of correlation detection in which the coherent processing interval is limited by source/receiver accelerations and/or medium instabilities. A method is described, which, in effect, computes an n‐dimensional correlation function uniquely related to target trajectory. Groups of relative... | We introduce in this paper a carrier phase detector suited to transmissions at very low signal to noise ratio. Based on the soft decoding of parity check equations, the synchronization scheme proposed here for a QPSK modulation outperforms a classical decision directed algorithm over a Gaussian channel, and is notably ... | eng_Latn | 5,497 |
Recent Developments on Rational Approximation | As a special case of nonlinear approximation, approximation by rational functions (we call it rational approximation usually) has its important significance in both practice and application, and becomes a vital research field in approximation theory. | The performance of a pragmatic carrier phase estimation algorithm is evaluated over a range of SNRs. The optimal SNR regions for MQAM are compared to an AWGN channel observing gains of up to 40% in throughput. | eng_Latn | 5,498 |
Structural Models of Poly(cyclopentadithiophene-alt-benzothiadiazole) with Branched Side Chains: Impact of a Single Fluorine Atom on the Crystal Structure and Polymorphism of a Conjugated Polymer | This study describes the impact of a single fluorine atom substitution in the conjugated backbone of poly(cyclopentadithiophene-alt-benzothiadiazole) on the structure and the polymorphism of the polymer bearing 2-ethylhexyl side chains. Controlled growth of the nonfluorinated and fluorinated polymers by solvent vapor a... | Without a cyclic prefix (CP), most single-carrier (SC) transmissions can not adopt frequency-domain equalizer (FDE) directly. This work utilizes frequency-domain channel estimator (FD-CE) and decision-feedback aliasing canceller (DF-AC) to produce single-FFT SC-FDE. In this way, non-CP single-carrier block transmission... | eng_Latn | 5,499 |
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