Browsing ECE Publications by Title
Now showing items 786805 of 1132

pEfficient Estimators
(19750820)This paper is concerned with estimates of an unknown vector parameter S based on observations X. A generalized error autocorrelation matrix with components the error moments of order 2p, is defined. A lower bound for ... 
Parallel Algorithms and Architectures for nearfar resistant CDMA acquisition
(19960520)Subspacebased algorithms are a class of algorithms for estimation problems in array signal processing and more recently nearfar resistant Code Division Multiple Access (CDMA) acquisition problems. Subspacebased algorithms ... 
Parallel algorithms and architectures for subspace based channel estimation for CDMA communication systems
(19960820)This paper presents an overview and results from an ongoing research project to study parallel algorithms for the acquisition of Code Division Multiple Access (CDMA) communication signals. The goal of this research isto ... 
A Parallel Graph Algorithm for Finding Connected Components
(19751020)A parallel program is presented that determines the connected components of an undirected graph in time 0(log<sup>2</sup>n) using n<sup>2</sup> processors. It is assumed that the processors have access to common memory. ... 
Parallel Interleaver Architecture with New Scheduling Scheme for High Throughput Configurable Turbo Decoder
(201305)Parallel architecture is required for high throughput turbo decoder to meet the data rate requirements of the emerging wireless communication systems. However, due to the severe memory conflict problem caused by parallel ... 
Parallel Nonbinary LDPC Decoding on GPU
(20121201)Nonbinary LowDensity ParityCheck (LDPC) codes are a class of errorcorrecting codes constructed over the Galois field GF(q) for q > 2. As extensions of binary LDPC codes, nonbinary LDPC codes can provide better ... 
Parallel SearchingBased Sphere Detector for MIMO Downlink OFDM Systems
(20120601)In this paper, implementation of a detector with parallel partial candidatesearch algorithm is described. Two fully independent partial candidate search processes are simultaneously employed for two groups of transmit ... 
Parallel VLSI Architectures for RealTime Control of Redundant Robots
(19910201)We present new architectures for the efficient computation of redundant manipulator inverse kinematics. A key component of our architecture is the calculation in VLSI hardware of the Singular Value Decomposition of the ... 
Parallel VLSI Architectures for RealTime Kinematics of Redundant Robots
(19940101)We describe new architectures for the efficient computation of redundant manipulator kinematics (direct and inverse). By calculating the core of the problem in hardware, we can make full use of the redundancy by implementing ... 
Parallel VLSI Architectures for RealTime Kinematics of Redundant Robots
(19930501)We describe new architectures for the efficient computation of redundant manipulator kinematics (direct and inverse). By calculating the core of the problem in hardware, we can make full use of the redundancy by implementing ... 
Partial Detection for Multiple Antenna Cooperation
(20090301)Multiantenna relays can significantly increase the speed and reliability of wireless systems. However, because of the complexity of MIMO detection, there is considerable overhead in implementing a MIMO relay if the ... 
Partially Blind Multiuser Detection
(19990320)Multiple access interference (MAI) is a significant limiting factor in the performance of direct sequence code division multiple access (DSCDMA) systems. Various multiuser detection techniques have been developed to combat ... 
Partially Blind Multiuser Receivers for CDMA Systems
(19991220)Multiple access interference (MAI) significantly limits the performance of codedivision multiple access (CDMA) systems. Existing multiuser receivers combat MAI using the knowledge of either all (conventional) or none ... 
Partially Coherent Constellations for MultipleAntenna Systems
(20031120)We consider the problem of digital communication in a Rayleigh flat fading environment using a multiple antenna system. We assume that the transmitter doesnâ t know the channel coefficients, and that the receiver has only ... 
Partially Coherent Multiple Antenna Systems: Design Criterion and Construction Methods for Constellations and Coded Modulation
(20040115)We consider multipleantenna communication systems in Rayleigh fading channel, where the transmitter does not know the channel coefficients and the receiver has only an estimate of them. We further assume that the transmitter ... 
PathChirp: Efficient Available Bandwidth Estimation for Network Paths
(20030401)This paper presents <i>PathChirp</i>, a new active probing tool for estimating the available bandwidth on a communication network path. Based on the concept of "selfinduced congestion," PathChirp features an exponential ... 
PCOPT: Optimal Offline Prefetching and Caching for Parallel I/O Systems
(200211)Abstract—We address the problem of prefetching and caching in a parallel I/O system and present a new algorithm for parallel disk scheduling. Traditional buffer management algorithms that minimize the number of block misses ... 

Performance  Complexity Comparison of Receivers for a LTE MIMO–OFDM System
(20100601)Implementation of receivers for spatial multiplexing multipleinput multipleoutput (MIMO) orthogonalfrequencydivisionmultiplexing (OFDM) systems is considered. The linear minimum meansquare error (LMMSE) and the Kbest ... 
Performance Analysis and Optimization of a Hybrid Seismic Imaging Application
(2016)Applications to process seismic data are computationally expensive and, therefore, employ scalable parallel systems to produce timely results. Here we describe our experiences of using performance analysis tools to gain ...