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Real-time correlation for locating systems utilizing heterogeneous computing architectures The usage of locating systems in sports (e.g. soccer) elevates match and training analysis to a new level. By tracking players and balls during matches or training, the performance of players can be analyzed, the training can be ...
Efficiently computing static single assignment form and the control dependence graph In optimizing compilers, data structure choices directly influence the power and efficiency of practical program optimization. A poor choice of data structure can inhibit optimization or slow compilation to the point that advanced opti...
The weakest failure detector for solving consensus We determine what information about failures is necessary and sufficient to solve Consensus in asynchronous distributed systems subject to crash failures. In Chandra and Toueg (1996), it is shown that {0, a failure detector that provides surprisingly little information...
Chord: A scalable peer-to-peer lookup service for internet applications A fundamental problem that confronts peer-to-peer applications is to efficiently locate the node that stores a particular data item. This paper presents Chord, a distributed lookup protocol that addresses this problem. Chord provides support for ju...
Database relations with null values A new formal approach is proposed for modeling incomplete database information by means of null values. The basis of our approach is an interpretation of nulls which obviates the need for more than one type of null. The conceptual soundness of this approach is demonstrated by general...
The Anatomy of the Grid: Enabling Scalable Virtual Organizations "Grid" computing has emerged as an important new field, distinguished from conventional distributed computing by its focus on large-scale resource sharing, innovative applications, and, in some cases, high performance orientation. In this article, the aut...
McPAT: An integrated power, area, and timing modeling framework for multicore and manycore architectures This paper introduces McPAT, an integrated power, area, and timing modeling framework that supports comprehensive design space exploration for multicore and manycore processor configurations ranging from 90 nm to 22...
Distributed Optimization and Statistical Learning via the Alternating Direction Method of Multipliers Many problems of recent interest in statistics and machine learning can be posed in the framework of convex optimization. Due to the explosion in size and complexity of modern datasets, it is increasingly important to ...
Skip graphs Skip graphs are a novel distributed data structure, based on skip lists, that provide the full functionality of a balanced tree in a distributed system where resources are stored in separate nodes that may fail at any time. They are designed for use in searching peer-to-peer systems, and by providing the ab...
The complexity of data aggregation in directed networks We study problems of data aggregation, such as approximate counting and computing the minimum input value, in synchronous directed networks with bounded message bandwidth B = Ω(log n). In undirected networks of diameter D, many such problems can easily be solved i...
A Local Passive Time Interpolation Concept for Variation-Tolerant High-Resolution Time-to-Digital Conversion Time-to-digital converters (TDCs) are promising building blocks for the digitalization of mixed-signal functionality in ultra-deep-submicron CMOS technologies. A short survey on state-of-the-art TDCs is given. A...
Area- and Power-Efficient Monolithic Buck Converters With Pseudo-Type III Compensation Monolithic PWM voltage-mode buck converters with a novel Pseudo-Type III (PT3) compensation are presented. The proposed compensation maintains the fast load transient response of the conventional Type III compensator; while the Type ...
Fundamental analysis of a car to car visible light communication system This paper presents a mathematical model for car-to-car (C2C) visible light communications (VLC) that aims to predict the system performance under different communication geometries. A market-weighted headlamp beam pattern model is employed. We con...
A Heterogeneous PIM Hardware-Software Co-Design for Energy-Efficient Graph Processing Processing-In-Memory (PIM) is an emerging technology that addresses the memory bottleneck of graph processing. In general, analog memristor-based PIM promises high parallelism provided that the underlying matrix-structured crossbar ca...
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A 90 nm CMOS 16 Gb/s Transceiver for Optical Interconnects Interconnect architectures which leverage high-bandwidth optical channels offer a promising solution to address the increasing chip-to-chip I/O bandwidth demands. This paper describes a dense, high-speed, and low-power CMOS optical interconnect transceiver arch...
Design Of Automotive Vcsel Transmitter With On-Chip Feedforward Optical Power Control We propose a novel 50 Mb/s optical transmitter fabricated in a 0.6 mu m BiCMOS technology for automotive applications. The proposed VCSEL driver chip was designed to operate with a single Supply voltage ranging from 3.0 V to 5.25 V. A...
Design of a 56 Gbit/s 4-level pulse-amplitude-modulation inductor-less vertical-cavity surface-emitting laser driver integrated circuit in 130 nm BiCMOS technology This paper presents the design and analysis of a 4-level pulse-amplitude-modulation (4-PAM) 56 Gbit/s vertical-cavity surface-emitting laser (VCSEL) driver ...
Survey of Photonic and Plasmonic Interconnect Technologies for Intra-Datacenter and High-Performance Computing Communications. Large scale data centers (DC) and high performance computing (HPC) systems require more and more computing power at higher energy efficiency. They are already consuming megawatts of power, and ...
A Differential Push-Pull Voltage Mode VCSEL Driver in 65-nm CMOS Improving power-conversion efficiency (PCE) of VCSEL drivers is paramount to improve the overall energy efficiency of the entire optical link for high-performance computing and datacenters. VCSEL diodes are normally driven single-ended with pseudo-differe...
The weakest failure detector for solving consensus We determine what information about failures is necessary and sufficient to solve Consensus in asynchronous distributed systems subject to crash failures. In Chandra and Toueg (1996), it is shown that {0, a failure detector that provides surprisingly little information...
Cognitive radio: brain-empowered wireless communications Cognitive radio is viewed as a novel approach for improving the utilization of a precious natural resource: the radio electromagnetic spectrum. The cognitive radio, built on a software-defined radio, is defined as an intelligent wireless communication system that...
Planning as heuristic search In the AIPS98 Planning Contest, the hsp planner showed that heuristic search planners can be competitive with state-of-the-art Graphplan and sat planners. Heuristic search planners like hsp transform planning problems into problems of heuristic search by automatically extracting heuristics ...
Probabilistic neural networks By replacing the sigmoid activation function often used in neural networks with an exponential function, a probabilistic neural network (PNN) that can compute nonlinear decision boundaries which approach the Bayes optimal is formed. Alternate activation functions having similar properties ...
TaintDroid: An Information-Flow Tracking System for Realtime Privacy Monitoring on Smartphones Today’s smartphone operating systems frequently fail to provide users with visibility into how third-party applications collect and share their private data. We address these shortcomings with TaintDroid, an efficient, system...
On receding horizon feedback control Receding horizon feedback control (RHFC) was originally introduced as an easy method for designing stable state-feedback controllers for linear systems. Here those results are generalized to the control of nonlinear autonomous systems, and we develop a performance index which is min...
Sensor network gossiping or how to break the broadcast lower bound Gossiping is an important problem in Radio Networks that has been well studied, leading to many important results. Due to strong resouce limitations of sensor nodes, previous solutions are frequently not feasible in Sensor Networks. In this paper, we st...
20.3 A feedforward controlled on-chip switched-capacitor voltage regulator delivering 10W in 32nm SOI CMOS On-chip (or fully integrated) switched-capacitor (SC) voltage regulators (SCVR) have recently received a lot of attention due to their ease of monolithic integration. The use of deep trench capacitors can lead to ...
A VCO-Based Nonuniform Sampling ADC Using a Slope-Dependent Pulse Generator This paper presents a voltage-controlled oscillator (VCO)-based nonuniform sampling analog-to-digital converter (ADC) as an alternative to the level-crossing (LC)-based converters for digitizing biopotential signals. This work aims to provide a...
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Direct bandpass sampling of multiple distinct RF signals A goal in the software radio design philosophy is to place the analog-to-digital converter as near the antenna as possible. This objective has been demonstrated for the case of a single input signal. Bandpass sampling has been applied to downconvert, or intention...
New Architecture for a Wireless Smart Sensor Based on a Software-Defined Radio. Today, wireless sensor technology is based on monolithic transceivers that optimize cost but have a rigid hardware architecture. In this paper, a new architecture for wireless sensors is presented. It is based on a software-defined radio co...
RF Front-End Concept and Implementation for Direct Sampling of Multiband Signals. The placement of the analog-to-digital converter as near the antenna as possible is a key issue in the software-defined radio receiver design. Direct sampling of the incoming filtered signal is a compact solution enabling channel simultan...
LC-Based Bandpass Continuous-Time Sigma-Delta Modulators With Widely Tunable Notch Frequency This paper analyses the use of bandpass continuous-time ΣΔ modulators with widely programmable notch frequency for the efficient digitization of radio-frequency signals in the next generation of software-defined-radio mobile sy...
The Design Method and Performance Analysis of RF Subsampling Frontend for SDR/CR Receivers RF subsampling can be used by radio receivers to directly down convert and digitize RF signals. The goal of software-defined radio (SDR) design is to place analog-to-digital converter (ADC) as near the antenna as possible. Based ...
All-digital TX frequency synthesizer and discrete-time receiver for Bluetooth radio in 130-nm CMOS We present a single-chip fully compliant Bluetooth radio fabricated in a digital 130-nm CMOS process. The transceiver is architectured from the ground up to be compatible with digital deep-submicron CMOS processes and be ...
A Second-Order Antialiasing Prefilter for a Software-Defined Radio Receiver A new architecture is presented for a sinc2(f) filter intended to sample channels of varying bandwidth when surrounded by blockers and adjacent bands. The sample rate is programmable from 5 to 40 MHz, and aliases are suppressed by 45 dB or more...
Second-order intermodulation mechanisms in CMOS downconverters An in-depth analysis of the mechanisms responsible for second-order intermodulation distortion in CMOS active downconverters is proposed in this paper. The achievable second-order input intercept point (IIP2) has a fundamental limit due to nonlinearity and ...
Track-and-Zoom Neural Analog-to-Digital Converter With Blind Stimulation Artifact Rejection Closed-loop neuromodulation for the treatment of neurological disorders requires monitoring of the brain activity uninterruptedly even during neurostimulation. This article presents a bidirectional 32-channel CMOS neural interfa...
Computing size-independent matrix problems on systolic array processors A methodology to transform dense to band matrices is presented in this paper. This transformation, is accomplished by triangular blocks partitioning, and allows the implementation of solutions to problems with any given size, by means of contraflow...
A tight lower bound on the cover time for random walks on graphs We prove that the expected time for a random walk to cover all n vertices of a graph is at least (1 + o(1))n In n. © 1995 Wiley Periodicals, Inc.
Decision making for cognitive radio equipment: analysis of the first 10 years of exploration. This article draws a general retrospective view on the first 10 years of cognitive radio (CR). More specifically, we explore in this article decision making and learning for CR from an equipment perspective. Thus, this article...
Implementation of LTE SC-FDMA on the USRP2 software defined radio platform In this paper we discuss the implementation of a Single Carrier Frequency Division Multiple Access (SC-FDMA) transceiver running over the Universal Software Radio Peripheral 2 (USRP2). SC-FDMA is the air interface which has been selected for the...
A Heterogeneous PIM Hardware-Software Co-Design for Energy-Efficient Graph Processing Processing-In-Memory (PIM) is an emerging technology that addresses the memory bottleneck of graph processing. In general, analog memristor-based PIM promises high parallelism provided that the underlying matrix-structured crossbar ca...
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A comprehensive review on type 2 fuzzy logic applications: Past, present and future In this paper a concise overview of the work that has been done by various researchers in the area of type-2 fuzzy logic is analyzed and discussed. Type-2 fuzzy systems have been widely applied in the fields of intelligent control, patt...
Type-2 Fuzzy Sets and Systems: An Overview [corrected reprint] As originally published in the February 2007 issue of IEEE Computational Intelligence Magazine, the above titled paper (ibid., vol. 2, no. 1, pp. 20-29, Feb 07) contained errors in mathematics that were introduced by the publisher. The corrected version is ...
Stability of switched positive linear systems with average dwell time switching. In this paper, the stability analysis problem for a class of switched positive linear systems (SPLSs) with average dwell time switching is investigated. A multiple linear copositive Lyapunov function (MLCLF) is first introduced, by which t...
Output tracking control for a class of continuous-time T-S fuzzy systems This paper investigates the problem of output tracking for nonlinear systems with actuator fault using interval type-2 (IT2) fuzzy model approach. An IT2 state-feedback fuzzy controller is designed to perform the tracking control problem, where th...
Adaptive Fault-Tolerant Tracking Control for Discrete-Time Multiagent Systems via Reinforcement Learning Algorithm This article investigates the adaptive fault-tolerant tracking control problem for a class of discrete-time multiagent systems via a reinforcement learning algorithm. The action neural networks (NNs) are u...
Robust fuzzy tracking control for robotic manipulators In this paper, a stable adaptive fuzzy-based tracking control is developed for robot systems with parameter uncertainties and external disturbance. First, a fuzzy logic system is introduced to approximate the unknown robotic dynamics by using adaptive algorithm. Ne...
A Survey of Reachability and Controllability for Positive Linear Systems. This paper is a survey of reachability and controllability results for discrete-time positive linear systems. It presents a variety of criteria in both algebraic and digraph forms for recognising these fundamental system properties with direct im...
GloMoSim: a library for parallel simulation of large-scale wireless networks Abstract Anumber,of library-based parallel ,and sequential network,simulators ,have ,been ,designed. This paper describes a library, called GloMoSim (for Global Mobile system Simulator), for parallel simulation of wireless networks. ...
TAG: a Tiny AGgregation service for ad-hoc sensor networks We present the Tiny AGgregation (TAG) service for aggregation in low-power, distributed, wireless environments. TAG allows users to express simple, declarative queries and have them distributed and executed efficiently in networks of low-power, wireless sensors...
On the evolution of user interaction in Facebook Online social networks have become extremely popular; numerous sites allow users to interact and share content using social links. Users of these networks often establish hundreds to even thousands of social links with other users. Recently, researchers have suggested ex...
The Quadrature LC Oscillator: A Complete Portrait Based on Injection Locking We show that the quadrature LC oscillator is best treated as two strongly coupled, nominally identical oscillators that are locked to the same frequency. Differential equations that extend Adler's description of locking to strong injection...
Permanent-magnets linear actuators applicability in automobile active suspensions Significant improvements in automobile suspension performance are achieved by active systems. However, current active suspension systems are too expensive and complex. Developments occurring in power electronics, permanent magnet material...
SPECS: A Lightweight Runtime Mechanism for Protecting Software from Security-Critical Processor Bugs Processor implementation errata remain a problem, and worse, a subset of these bugs are security-critical. We classified 7 years of errata from recent commercial processors to understand the magnitude and severity of th...
Power Efficiency Comparison of Event-Driven and Fixed-Rate Signal Conversion and Compression for Biomedical Applications Energy-constrained biomedical recording systems need power-efficient data converters and good signal compression in order to meet the stringent power consumption requirements of many applications. In...
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Real time front-end for cognitive radio inspired by the human cochlea In this paper we discuss the real time implementation and development of a front-end that is able to sample RF signals with a large bandwidth and dynamic range. This front-end uses an 8 channel RF multiplexer sampled by an 8 channel ADC board. A FPGA...
Efficiently computing static single assignment form and the control dependence graph In optimizing compilers, data structure choices directly influence the power and efficiency of practical program optimization. A poor choice of data structure can inhibit optimization or slow compilation to the point that advanced opti...
The weakest failure detector for solving consensus We determine what information about failures is necessary and sufficient to solve Consensus in asynchronous distributed systems subject to crash failures. In Chandra and Toueg (1996), it is shown that {0, a failure detector that provides surprisingly little information...
Chord: A scalable peer-to-peer lookup service for internet applications A fundamental problem that confronts peer-to-peer applications is to efficiently locate the node that stores a particular data item. This paper presents Chord, a distributed lookup protocol that addresses this problem. Chord provides support for ju...
Database relations with null values A new formal approach is proposed for modeling incomplete database information by means of null values. The basis of our approach is an interpretation of nulls which obviates the need for more than one type of null. The conceptual soundness of this approach is demonstrated by general...
The Anatomy of the Grid: Enabling Scalable Virtual Organizations "Grid" computing has emerged as an important new field, distinguished from conventional distributed computing by its focus on large-scale resource sharing, innovative applications, and, in some cases, high performance orientation. In this article, the aut...
McPAT: An integrated power, area, and timing modeling framework for multicore and manycore architectures This paper introduces McPAT, an integrated power, area, and timing modeling framework that supports comprehensive design space exploration for multicore and manycore processor configurations ranging from 90 nm to 22...
Distributed Optimization and Statistical Learning via the Alternating Direction Method of Multipliers Many problems of recent interest in statistics and machine learning can be posed in the framework of convex optimization. Due to the explosion in size and complexity of modern datasets, it is increasingly important to ...
Skip graphs Skip graphs are a novel distributed data structure, based on skip lists, that provide the full functionality of a balanced tree in a distributed system where resources are stored in separate nodes that may fail at any time. They are designed for use in searching peer-to-peer systems, and by providing the ab...
The complexity of data aggregation in directed networks We study problems of data aggregation, such as approximate counting and computing the minimum input value, in synchronous directed networks with bounded message bandwidth B = Ω(log n). In undirected networks of diameter D, many such problems can easily be solved i...
A Local Passive Time Interpolation Concept for Variation-Tolerant High-Resolution Time-to-Digital Conversion Time-to-digital converters (TDCs) are promising building blocks for the digitalization of mixed-signal functionality in ultra-deep-submicron CMOS technologies. A short survey on state-of-the-art TDCs is given. A...
Area- and Power-Efficient Monolithic Buck Converters With Pseudo-Type III Compensation Monolithic PWM voltage-mode buck converters with a novel Pseudo-Type III (PT3) compensation are presented. The proposed compensation maintains the fast load transient response of the conventional Type III compensator; while the Type ...
Fundamental analysis of a car to car visible light communication system This paper presents a mathematical model for car-to-car (C2C) visible light communications (VLC) that aims to predict the system performance under different communication geometries. A market-weighted headlamp beam pattern model is employed. We con...
A Heterogeneous PIM Hardware-Software Co-Design for Energy-Efficient Graph Processing Processing-In-Memory (PIM) is an emerging technology that addresses the memory bottleneck of graph processing. In general, analog memristor-based PIM promises high parallelism provided that the underlying matrix-structured crossbar ca...
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An Efficient VLSI Architecture of a Reconfigurable Pulse-Shaping FIR Interpolation This brief proposes a two-step optimization technique for designing a reconfigurable VLSI architecture of an interpolation filter for multistandard digital up converter (DUC) to reduce the power and area consumption. The proposed techniq...
Efficiently computing static single assignment form and the control dependence graph In optimizing compilers, data structure choices directly influence the power and efficiency of practical program optimization. A poor choice of data structure can inhibit optimization or slow compilation to the point that advanced opti...
The weakest failure detector for solving consensus We determine what information about failures is necessary and sufficient to solve Consensus in asynchronous distributed systems subject to crash failures. In Chandra and Toueg (1996), it is shown that {0, a failure detector that provides surprisingly little information...
Chord: A scalable peer-to-peer lookup service for internet applications A fundamental problem that confronts peer-to-peer applications is to efficiently locate the node that stores a particular data item. This paper presents Chord, a distributed lookup protocol that addresses this problem. Chord provides support for ju...
Database relations with null values A new formal approach is proposed for modeling incomplete database information by means of null values. The basis of our approach is an interpretation of nulls which obviates the need for more than one type of null. The conceptual soundness of this approach is demonstrated by general...
The Anatomy of the Grid: Enabling Scalable Virtual Organizations "Grid" computing has emerged as an important new field, distinguished from conventional distributed computing by its focus on large-scale resource sharing, innovative applications, and, in some cases, high performance orientation. In this article, the aut...
McPAT: An integrated power, area, and timing modeling framework for multicore and manycore architectures This paper introduces McPAT, an integrated power, area, and timing modeling framework that supports comprehensive design space exploration for multicore and manycore processor configurations ranging from 90 nm to 22...
Distributed Optimization and Statistical Learning via the Alternating Direction Method of Multipliers Many problems of recent interest in statistics and machine learning can be posed in the framework of convex optimization. Due to the explosion in size and complexity of modern datasets, it is increasingly important to ...
Skip graphs Skip graphs are a novel distributed data structure, based on skip lists, that provide the full functionality of a balanced tree in a distributed system where resources are stored in separate nodes that may fail at any time. They are designed for use in searching peer-to-peer systems, and by providing the ab...
The complexity of data aggregation in directed networks We study problems of data aggregation, such as approximate counting and computing the minimum input value, in synchronous directed networks with bounded message bandwidth B = Ω(log n). In undirected networks of diameter D, many such problems can easily be solved i...
A Local Passive Time Interpolation Concept for Variation-Tolerant High-Resolution Time-to-Digital Conversion Time-to-digital converters (TDCs) are promising building blocks for the digitalization of mixed-signal functionality in ultra-deep-submicron CMOS technologies. A short survey on state-of-the-art TDCs is given. A...
Area- and Power-Efficient Monolithic Buck Converters With Pseudo-Type III Compensation Monolithic PWM voltage-mode buck converters with a novel Pseudo-Type III (PT3) compensation are presented. The proposed compensation maintains the fast load transient response of the conventional Type III compensator; while the Type ...
Conductance modulation techniques in switched-capacitor DC-DC converter for maximum-efficiency tracking and ripple mitigation in 22nm Tri-gate CMOS Active conduction modulation techniques are demonstrated in a fully integrated multi-ratio switched-capacitor voltage regulator with hysteretic control, implemented in 22nm...
A Heterogeneous PIM Hardware-Software Co-Design for Energy-Efficient Graph Processing Processing-In-Memory (PIM) is an emerging technology that addresses the memory bottleneck of graph processing. In general, analog memristor-based PIM promises high parallelism provided that the underlying matrix-structured crossbar ca...
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A Deep Reinforcement Learning-Based Multi-Optimality Routing Scheme For Dynamic Iot Networks With the development of Internet of Things (IoT) and 5G technologies, more and more applications, such as autonomous vehicles and tele-medicine, become more sensitive to network latency and accuracy, which require routing schem...
Enhancing peer-to-peer content discovery techniques over mobile ad hoc networks Content dissemination over mobile ad hoc networks (MANETs) is usually performed using peer-to-peer (P2P) networks due to its increased resiliency and efficiency when compared to client-server approaches. P2P networks are usually divided int...
Reducing query overhead through route learning in unstructured peer-to-peer network In unstructured peer-to-peer networks, such as Gnutella, peers propagate query messages towards the resource holders by flooding them through the network. This is, however, a costly operation since it consumes node and link resources ex...
A Trusted Routing Scheme Using Blockchain and Reinforcement Learning for Wireless Sensor Networks. A trusted routing scheme is very important to ensure the routing security and efficiency of wireless sensor networks (WSNs). There are a lot of studies on improving the trustworthiness between routing nodes, using cryptog...
Decentralized Multi-Agent Reinforcement Learning With Networked Agents: Recent Advances Multi-agent reinforcement learning (MARL) has long been a significant research topic in both machine learning and control systems. Recent development of (single-agent) deep reinforcement learning has created a resurgence of interest...
Chord: a scalable peer-to-peer lookup protocol for internet applications A fundamental problem that confronts peer-to-peer applications is the efficient location of the node that stores a desired data item. This paper presents Chord, a distributed lookup protocol that addresses this problem. Chord provides support for ...
Randomized algorithms This text by two well-known experts in the field presents the basic concepts in the design and analysis of randomized algorithms at a level accessible to beginning graduate students, professionals and researchers.
A Formal Basis for the Heuristic Determination of Minimum Cost Paths Although the problem of determining the minimum cost path through a graph arises naturally in a number of interesting applications, there has been no underlying theory to guide the development of efficient search procedures. Moreover, there is no adeq...
Consensus problems in networks of agents with switching topology and time-delays. In this paper, we discuss consensus problems for a network of dynamic agents with flxed and switching topologies. We analyze three cases: i) networks with switching topology and no time-delays, ii) networks with flxed topology and communi...
Gossip-based aggregation in large dynamic networks As computer networks increase in size, become more heterogeneous and span greater geographic distances, applications must be designed to cope with the very large scale, poor reliability, and often, with the extreme dynamism of the underlying network. Aggregation is a k...
On receding horizon feedback control Receding horizon feedback control (RHFC) was originally introduced as an easy method for designing stable state-feedback controllers for linear systems. Here those results are generalized to the control of nonlinear autonomous systems, and we develop a performance index which is min...
Cross-layer sensors for green cognitive radio. Green cognitive radio is a cognitive radio (CR) that is aware of sustainable development issues and deals with an additional constraint as regards the decision-making function of the cognitive cycle. In this paper, it is explained how the sensors distributed throughout the...
20.3 A feedforward controlled on-chip switched-capacitor voltage regulator delivering 10W in 32nm SOI CMOS On-chip (or fully integrated) switched-capacitor (SC) voltage regulators (SCVR) have recently received a lot of attention due to their ease of monolithic integration. The use of deep trench capacitors can lead to ...
An Energy-Efficient SAR ADC With Event-Triggered Error Correction This brief presents an energy-efficient fully differential 10-bit successive approximation register (SAR) analog-to-digital converter (ADC) with a resolution of 10 bits and a sampling rate of 320 kS/s. The optimal capacitor split and bypass number is ana...
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A 0.024mm2 8b 400MS/s SAR ADC with 2b/cycle and resistive DAC in 65nm CMOS.
A 6.2mW 7b 3.5GS/s time interleaved 2-stage pipelined ADC in 40nm CMOS A 7b time interleaved hybrid ADC in 40nm CMOS is presented. The ADC consists of two pipelined stages and combines an intrinsically linear SAR with a fully calibrated binary search architecture to achieve energy efficiency. The first stage of each ch...
A 4.5-mW 8-b 750-MS/s 2-b/step asynchronous subranged SAR ADC in 28-nm CMOS technology A 8-b 2-b/step asynchronous subranged SAR ADC is presented. It incorporates subranging technique to obtain fast reference settling for MSB conversion. The capacitive interpolation reduces number of NMOS switches and lowers matching r...
A 2.2mW 5b 1.75GS/s Folding Flash ADC in 90nm Digital CMOS
A 10b 100MS/s 1.13mW SAR ADC with binary-scaled error compensation This paper presents a 10 b SAR ADC with a binary-scaled error compensation technique. The prototype occupies an active area of 155 × 165 ¿m2 in 65 nm CMOS. At 100 MS/S, the ADC achieves an SNDR of 59.0 dB and an SFDR of 75.6 dB, while consuming 1.13 m...
A Polynomial-Based Time-Varying Filter Structure for the Compensation of Frequency-Response Mismatch Errors in Time-Interleaved ADCs This paper introduces a structure for the compensation of frequency-response mismatch errors in M-channel time-interleaved analog-to-digital converters (ADCs). It makes use of a number of...
Column-oriented database systems Column-oriented database systems (column-stores) have attracted a lot of attention in the past few years. Column-stores, in a nutshell, store each database table column separately, with attribute values belonging to the same column stored contiguously, compressed, and densely packed, as...
Data reorganization in memory using 3D-stacked DRAM In this paper we focus on common data reorganization operations such as shuffle, pack/unpack, swap, transpose, and layout transformations. Although these operations simply relocate the data in the memory, they are costly on conventional systems mainly due to inefficie...
MapGraph: A High Level API for Fast Development of High Performance Graph Analytics on GPUs High performance graph analytics are critical for a long list of application domains. In recent years, the rapid advancement of many-core processors, in particular graphical processing units (GPUs), has sparked a broad interest ...
Max-Min D-Cluster Formation in Wireless Ad Hoc Networks An ad hoc network may be logically represented as a set of clusters. The clusterheads form a -hop dominating set. Each node is at most hops from a clusterhead. Clusterheads form a virtual backbone and may be used to route packets for nodes in their cluster. Previo...
On classification with incomplete data. We address the incomplete-data problem in which feature vectors to be classified are missing data (features). A (supervised) logistic regression algorithm for the classification of incomplete data is developed. Single or multiple imputation for the missing data is avoided by perf...
Study of Subharmonically Injection-Locked PLLs A complete analysis on subharmonically injection-locked PLLs develops fundamental theory for subharmonic locking phenomenon. It explains the noise shaping phenomenon, locking range and behavior, PVT tolerance, and pseudo locking issue. All of the analyses are verified by r...
An emergency communication system based on software-defined radio. Wireless telecommunications represent an important asset for public protection and disaster relief (PPDR) organizations as they improve the coordination and the distribution of information among first responders in the field. In large international disa...
A Heterogeneous PIM Hardware-Software Co-Design for Energy-Efficient Graph Processing Processing-In-Memory (PIM) is an emerging technology that addresses the memory bottleneck of graph processing. In general, analog memristor-based PIM promises high parallelism provided that the underlying matrix-structured crossbar ca...
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Improved Switched System Approach to Networked Control Systems With Time-Varying Delays An improved switched system approach is proposed for the stability and stabilization of networked control systems with time-varying delays. The approach features a mode-dependent state feedback controller guaranteeing the exponentia...
Offset-Free Model Predictive Control for the Power Control of Three-Phase AC/DC Converters This paper describes an offset-free model predictive control (MPC) algorithm using a disturbance observer (DOB) to control the active/reactive powers of a three-phase AC/DC converter. The strategy of this paper is twofold. One is...
Further results on cloud control systems. This paper is devoted to further investigating the cloud control systems (CCSs). The benefits and challenges of CCSs are provided. Both new research results of ours and some typical work made by other researchers are presented. It is believed that the CCSs can have huge and pro...
Moving Horizon Estimation for Mobile Robots With Multirate Sampling. This paper investigates the multirate moving horizon estimation (MMHE) problem for mobile robots with inertial sensor and camera, where the sampling rates of the sensors are not identical. In the sense of the multirate systems, some sensors may have n...
Real-Time Switched Model Predictive Control for a Cyber-Physical Wind Turbine Emulator The high complexity and nonlinearity of wind turbine (WT) systems impose the utilization of rigorous control methods such as model predictive control (MPC). MPC algorithms are computationally intensive requiring investigation of real...
A New Delay-Compensation Scheme for Networked Control Systems in Controller Area Networks. In this work, we aim to study a new delay-compensation algorithm for networked control systems (NCSs) which are connected via the controller area network (CAN) buses. First, we analyze the property of CAN bus and find the main so...
A Bayesian Method for the Induction of Probabilistic Networks from Data This paper presents a Bayesian method for constructing probabilistic networks from databases. In particular, we focus on constructing Bayesian belief networks. Potential applications include computer-assisted hypothesis testing, automated scient...
Distributed estimation and quantization An algorithm is developed for the design of a nonlinear, n-sensor, distributed estimation system subject to communication and computation constraints. The algorithm uses only bivariate probability distributions and yields locally optimal estimators that satisfy the required syste...
Supporting Aggregate Queries Over Ad-Hoc Wireless Sensor Networks We show how the database community's notion of a generic query interface for data aggregation can be applied to ad-hoc networks of sensor devices. As has been noted in the sensor network literature, aggregation is important as a data reduction tool; netw...
Exploiting ILP, TLP, and DLP with the polymorphous TRIPS architecture This paper describes the polymorphous TRIPS architecture which can be configured for different granularities and types of parallelism. TRIPS contains mechanisms that enable the processing cores and the on-chip memory system to be configured and combi...
A 10-Gb/s CMOS clock and data recovery circuit with a half-rate binary phase/frequency detector A 10-Gb/s phase-locked clock and data recovery circuit incorporates a multiphase LC oscillator and a half-rate phase/frequency detector with automatic data retiming. Fabricated in 0.18-μm CMOS technology in an area of 1.75×1...
A Dht-Based Discovery Service For The Internet Of Things Current trends towards the Future Internet are envisaging the conception of novel services endowed with context-aware and autonomic capabilities to improve end users' quality of life. The Internet of Things paradigm is expected to contribute towards this ambitiou...
Current-mode adaptively hysteretic control for buck converters with fast transient response and improved output regulation This paper presents a current-mode adaptively hysteretic control (CMAHC) technique to achieve the fast transient response for DC-DC buck converters. A complementary full range current sensor compri...
A VCO-Based Nonuniform Sampling ADC Using a Slope-Dependent Pulse Generator This paper presents a voltage-controlled oscillator (VCO)-based nonuniform sampling analog-to-digital converter (ADC) as an alternative to the level-crossing (LC)-based converters for digitizing biopotential signals. This work aims to provide a...
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Dead-beat terminal sliding-mode control: A guaranteed attractiveness approach This paper presents a design method of terminal sliding mode control with the guaranteed attractiveness, for which the tracking performance of the closed-loop system undertaken is governed by a discretized finite-time system (FTS). To allevia...
A Probabilistic Neural-Fuzzy Learning System for Stochastic Modeling A probabilistic fuzzy neural network (PFNN) with a hybrid learning mechanism is proposed to handle complex stochastic uncertainties. Fuzzy logic systems (FLSs) are well known for vagueness processing. Embedded with the probabilistic method, an FLS wil...
Design of Fuzzy-Neural-Network-Inherited Backstepping Control for Robot Manipulator Including Actuator Dynamics This study presents the design and analysis of an intelligent control system that inherits the systematic and recursive design methodology for an n-link robot manipulator, including actuator dynamics, in orde...
Reactive Power Control of Three-Phase Grid-Connected PV System During Grid Faults Using Takagi–Sugeno–Kang Probabilistic Fuzzy Neural Network Control An intelligent controller based on the Takagi-Sugeno-Kang-type probabilistic fuzzy neural network with an asymmetric membership function (TSKPFNN-AMF) is developed in thi...
Discrete-Time Quasi-Sliding-Mode Control With Prescribed Performance Function and its Application to Piezo-Actuated Positioning Systems. In this paper, the constrained control problem of the prescribed performance control technique is discussed in discrete-time domain for single input-single output dynamical systems. T...
Sliding mode control for singularly perturbed Markov jump descriptor systems with nonlinear perturbation This paper develops a stochastic integral sliding mode control strategy for singularly perturbed Markov jump descriptor systems subject to nonlinear perturbation. The transition probabilities (TPs) for the system mo...
The part-time parliament Recent archaeological discoveries on the island of Paxos reveal that the parliament functioned despite the peripatetic propensity of its part-time legislators. The legislators maintained consistent copies of the parliamentary record, despite their frequent forays from the chamber and the forget...
Design Techniques for Fully Integrated Switched-Capacitor DC-DC Converters. This paper describes design techniques to maximize the efficiency and power density of fully integrated switched-capacitor (SC) DC-DC converters. Circuit design methods are proposed to enable simplified gate drivers while supporting multiple to...
Distributed reset A reset subsystem is designed that can be embedded in an arbitrary distributed system in order to allow the system processes to reset the system when necessary. Our design is layered, and comprises three main components: a leader election, a spanning tree construction, and a diffusing computation. Eac...
Distributed multi-agent optimization with state-dependent communication We study distributed algorithms for solving global optimization problems in which the objective function is the sum of local objective functions of agents and the constraint set is given by the intersection of local constraint sets of agents. We as...
Yet another MicroArchitectural Attack:: exploiting I-Cache MicroArchitectural Attacks (MA), which can be considered as a special form of Side-Channel Analysis, exploit microarchitectural functionalities of processor implementations and can compromise the security of computational environments even in the presence of so...
A decentralized modular control framework for robust control of FES-activated walker-assisted paraplegic walking using terminal sliding mode and fuzzy logic control. A major challenge to developing functional electrical stimulation (FES) systems for paraplegic walking and widespread acceptance of these systems is the d...
PUMP: a programmable unit for metadata processing We introduce the Programmable Unit for Metadata Processing (PUMP), a novel software-hardware element that allows flexible computation with uninterpreted metadata alongside the main computation with modest impact on runtime performance (typically 10--40% for single polic...
A 1V 3.5 μW Bio-AFE With Chopper-Capacitor-Chopper Integrator-Based DSL and Low Power GM-C Filter This brief presents a low-noise, low-power bio-signal acquisition analog front-end (Bio-AFE). It mainly includes a capacitively coupled chopper-stabilized instrumentation amplifier (CCIA), a programmable gain amplifier (PG...
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FReaC Cache: Folded-logic Reconfigurable Computing in the Last Level Cache The need for higher energy efficiency has resulted in the proliferation of accelerators across platforms, with custom and reconfigurable accelerators adopted in both edge devices and cloud servers. However, existing solutions fall short in provi...
Architecture Aware Partitioning Algorithms Existing partitioning algorithms provide limited support for load balancing simulations that are performed on heterogeneous parallel computing platforms. On such architectures, effec- tive load balancing can only be achieved if the graph is distributed so that it properly take...
AMD Fusion APU: Llano The Llano variant of the AMD Fusion accelerated processor unit (APU) deploys AMD Turbo CORE technology to maximize processor performance within the system's thermal design limits. Low-power design and performance/watt ratio optimization were key design approaches, and power gating is implemented p...
Decoupling Data Supply from Computation for Latency-Tolerant Communication in Heterogeneous Architectures. In today’s computers, heterogeneous processing is used to meet performance targets at manageable power. In adopting increased compute specialization, however, the relative amount of time spent on communication inc...
Stream Floating: Enabling Proactive and Decentralized Cache Optimizations As multicore systems continue to grow in scale and on-chip memory capacity, the on-chip network bandwidth and latency become problematic bottlenecks. Because of this, overheads in data transfer, the coherence protocol and replacement policies bec...
Decentralized Offload-based Execution on Memory-centric Compute Cores.
QsCores: trading dark silicon for scalable energy efficiency with quasi-specific cores Transistor density continues to increase exponentially, but power dissipation per transistor is improving only slightly with each generation of Moore's law. Given the constant chip-level power budgets, this exponentially decreases th...
Wireless sensor networks: a survey This paper describes the concept of sensor networks which has been made viable by the convergence of micro-electro-mechanical systems technology, wireless communications and digital electronics. First, the sensing tasks and the potential sensor networks applications are explored, and ...
Network-based robust H∞ control of systems with uncertainty This paper is concerned with the design of robust H"~ controllers for uncertain networked control systems (NCSs) with the effects of both the network-induced delay and data dropout taken into consideration. A new analysis method for H"~ performance of NCSs is ...
Incremental Stochastic Subgradient Algorithms for Convex Optimization This paper studies the effect of stochastic errors on two constrained incremental subgradient algorithms. The incremental subgradient algorithms are viewed as decentralized network optimization algorithms as applied to minimize a sum of functions, wh...
Wireless communications in the twenty-first century: a perspective Wireless communications are expected to be the dominant mode of access technology in the next century. Besides voice, a new range of services such as multimedia, high-speed data, etc. are being offered for delivery over wireless networks. Mobility will ...
A 60-GHz 16QAM/8PSK/QPSK/BPSK Direct-Conversion Transceiver for IEEE802.15.3c. This paper presents a 60-GHz direct-conversion transceiver using 60-GHz quadrature oscillators. The transceiver has been fabricated in a standard 65-nm CMOS process. It in cludes a receiver with a 17.3-dB conversion gain and less than 8.0-dB...
Reduction and IR-drop compensations techniques for reliable neuromorphic computing systems Neuromorphic computing system (NCS) is a promising architecture to combat the well-known memory bottleneck in Von Neumann architecture. The recent breakthrough on memristor devices made an important step toward realizing a low-po...
A Bidirectional Neural Interface IC With Chopper Stabilized BioADC Array and Charge Balanced Stimulator. We present a bidirectional neural interface with a 4-channel biopotential analog-to-digital converter (bioADC) and a 4-channel current-mode stimulator in 180 nm CMOS. The bioADC directly transduces microvolt biopote...
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Signal receiving and processing platform of the experimental passive radar for intelligent surveillance system using software defined radio approach This document presents a signal receiving and processing platform for an experimental FM radio based multistatic passive radar utilizing Software Defined Radio. This radar...
Efficiently computing static single assignment form and the control dependence graph In optimizing compilers, data structure choices directly influence the power and efficiency of practical program optimization. A poor choice of data structure can inhibit optimization or slow compilation to the point that advanced opti...
The weakest failure detector for solving consensus We determine what information about failures is necessary and sufficient to solve Consensus in asynchronous distributed systems subject to crash failures. In Chandra and Toueg (1996), it is shown that {0, a failure detector that provides surprisingly little information...
Chord: A scalable peer-to-peer lookup service for internet applications A fundamental problem that confronts peer-to-peer applications is to efficiently locate the node that stores a particular data item. This paper presents Chord, a distributed lookup protocol that addresses this problem. Chord provides support for ju...
Database relations with null values A new formal approach is proposed for modeling incomplete database information by means of null values. The basis of our approach is an interpretation of nulls which obviates the need for more than one type of null. The conceptual soundness of this approach is demonstrated by general...
The Anatomy of the Grid: Enabling Scalable Virtual Organizations "Grid" computing has emerged as an important new field, distinguished from conventional distributed computing by its focus on large-scale resource sharing, innovative applications, and, in some cases, high performance orientation. In this article, the aut...
McPAT: An integrated power, area, and timing modeling framework for multicore and manycore architectures This paper introduces McPAT, an integrated power, area, and timing modeling framework that supports comprehensive design space exploration for multicore and manycore processor configurations ranging from 90 nm to 22...
Distributed Optimization and Statistical Learning via the Alternating Direction Method of Multipliers Many problems of recent interest in statistics and machine learning can be posed in the framework of convex optimization. Due to the explosion in size and complexity of modern datasets, it is increasingly important to ...
Skip graphs Skip graphs are a novel distributed data structure, based on skip lists, that provide the full functionality of a balanced tree in a distributed system where resources are stored in separate nodes that may fail at any time. They are designed for use in searching peer-to-peer systems, and by providing the ab...
The complexity of data aggregation in directed networks We study problems of data aggregation, such as approximate counting and computing the minimum input value, in synchronous directed networks with bounded message bandwidth B = Ω(log n). In undirected networks of diameter D, many such problems can easily be solved i...
A Local Passive Time Interpolation Concept for Variation-Tolerant High-Resolution Time-to-Digital Conversion Time-to-digital converters (TDCs) are promising building blocks for the digitalization of mixed-signal functionality in ultra-deep-submicron CMOS technologies. A short survey on state-of-the-art TDCs is given. A...
Area- and Power-Efficient Monolithic Buck Converters With Pseudo-Type III Compensation Monolithic PWM voltage-mode buck converters with a novel Pseudo-Type III (PT3) compensation are presented. The proposed compensation maintains the fast load transient response of the conventional Type III compensator; while the Type ...
Conductance modulation techniques in switched-capacitor DC-DC converter for maximum-efficiency tracking and ripple mitigation in 22nm Tri-gate CMOS Active conduction modulation techniques are demonstrated in a fully integrated multi-ratio switched-capacitor voltage regulator with hysteretic control, implemented in 22nm...
A Heterogeneous PIM Hardware-Software Co-Design for Energy-Efficient Graph Processing Processing-In-Memory (PIM) is an emerging technology that addresses the memory bottleneck of graph processing. In general, analog memristor-based PIM promises high parallelism provided that the underlying matrix-structured crossbar ca...
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A Clock-Phase Reuse Technique for Discrete-Time Bandpass Filters In this article, we apply a new clock-phase reuse technique to a discrete-time infinite impulse response (IIR) complex-signaling bandpass filter (BPF). This leads to a deep improvement in filtering, especially the stopband rejection, while maintaining the...
A Charge-Rotating IIR Filter with Linear Interpolation and High Stop-Band Rejection This paper introduces a new architecture of a discrete-time charge-rotating low-pass filter (LPF) which achieves a high-order of filtering and improves its stop-band rejection while maintaining a reasonable duty cycle of the main clock ...
An 8-bit 100-mhz cmos linear interpolation dac An 8-bit 100-MHz CMOS linear interpolation digital-to-analog converter (DAC) is presented. It applies a time-interleaved structure on an 8-bit binary-weighted DAC, using 16 evenly skewed clocks generated by a voltage-controlled delay line to realize the linear interpolatio...
A Quadrature Charge-Domain Sampling Mixer With Embedded FIR, IIR, and N-Path Filters This paper presents the analysis and design of a quadrature charge-domain down-conversion sampling mixer with embedded finite-impulse-response (FIR), infinite-impulse-response (IIR), and 4-path bandpass filters. An in-depth investigati...
Low-Power Highly Selective Channel Filtering Using a Transconductor–Capacitor Analog FIR Analog finite-impulse-response (AFIR) filtering is proposed to realize low-power channel selection filters for the Internet-of-Things receivers. High selectivity is achieved using an architecture based on only a single—time-varying...
Enhanced-Selectivity High-Linearity Low-Noise Mixer-First Receiver With Complex Pole Pair Due to Capacitive Positive Feedback. A mixer-first receiver (RX) with enhanced selectivity and high dynamic range is proposed, targeting to remove surface acoustic-wave-filters in mobile phones and cover all frequency bands up to ...
Chord: a scalable peer-to-peer lookup protocol for internet applications A fundamental problem that confronts peer-to-peer applications is the efficient location of the node that stores a desired data item. This paper presents Chord, a distributed lookup protocol that addresses this problem. Chord provides support for ...
Time-delay systems: an overview of some recent advances and open problems After presenting some motivations for the study of time-delay system, this paper recalls modifications (models, stability, structure) arising from the presence of the delay phenomenon. A brief overview of some control approaches is then provided,...
Bayesian Network Classifiers Recent work in supervised learning has shown that a surprisinglysimple Bayesian classifier with strong assumptions of independence amongfeatures, called naive Bayes, is competitive withstate-of-the-art classifiers such as C4.5. This fact raises the question ofwhether a classifier with less ...
A theory of nonsubtractive dither A detailed mathematical investigation of multibit quantizing systems using nonsubtractive dither is presented. It is shown that by the use of dither having a suitably chosen probability density function, moments of the total error can be made independent of the system input signal but ...
Codejail: Application-Transparent Isolation of Libraries with Tight Program Interactions.
An Opportunistic Cognitive MAC Protocol for Coexistence with WLAN In last decades, the demand of wireless spectrum has increased rapidly with the development of mobile communication services. Recent studies recognize that traditional fixed spectrum assignment does not use spectrum efficiently. Such a wasting phenomenon...
20.3 A feedforward controlled on-chip switched-capacitor voltage regulator delivering 10W in 32nm SOI CMOS On-chip (or fully integrated) switched-capacitor (SC) voltage regulators (SCVR) have recently received a lot of attention due to their ease of monolithic integration. The use of deep trench capacitors can lead to ...
Neuropixels Data-Acquisition System: A Scalable Platform for Parallel Recording of 10,000+ Electrophysiological Signals. Although CMOS fabrication has enabled a quick evolution in the design of high-density neural probes and neural-recording chips, the scaling and miniaturization of the complete data-acquisition system...
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