Now showing items 783-802 of 1128

    • p-Efficient Estimators 

      Papantoni-Kazakos, P. (1975-08-20)
      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 near-far resistant CDMA acquisition 

      Kota, Kishore (1996-05-20)
      Subspace-based algorithms are a class of algorithms for estimation problems in array signal processing and more recently near-far resistant Code Division Multiple Access (CDMA) acquisition problems. Subspace-based algorithms ...
    • Parallel algorithms and architectures for subspace based channel estimation for CDMA communication systems 

      Sengupta, Chaitali; Kota, Kishore; Cavallaro, Joseph R. (1996-08-20)
      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 

      Hirschberg, D.S. (1975-10-20)
      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 

      Wang, Guohui; Vosoughi, Aida; Shen, Hao; Cavallaro, Joseph R.; Guo, Yuanbin (2013-05)
      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 

      Wang, Guohui; Shen, Hao; Yin, Bei; Wu, Michael; Sun, Yang; Cavallaro, Joseph R. (2012-12-01)
      Nonbinary Low-Density Parity-Check (LDPC) codes are a class of error-correcting codes constructed over the Galois field GF(q) for q > 2. As extensions of binary LDPC codes, nonbinary LDPC codes can provide better ...
    • Parallel Searching-Based Sphere Detector for MIMO Downlink OFDM Systems 

      Radosavljevic, Predrag; Kim, Kyeong Jin; Shen, Hao; Cavallaro, Joseph R. (2012-06-01)
      In this paper, implementation of a detector with parallel partial candidate-search algorithm is described. Two fully independent partial candidate search processes are simultaneously employed for two groups of transmit ...
    • Parallel VLSI Architectures for Real-Time Control of Redundant Robots 

      Walker, Ian D.; Cavallaro, Joseph R. (1991-02-01)
      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 Real-Time Kinematics of Redundant Robots 

      Walker, Ian D.; Cavallaro, Joseph R. (1994-01-01)
      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 Real-Time Kinematics of Redundant Robots 

      Walker, Ian D.; Cavallaro, Joseph R. (1993-05-01)
      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 

      Amiri, Kiarash; Cavallaro, Joseph R. (2009-03-01)
      Multi-antenna 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 

      Das, Suman; Bhashyam, Srikrishna; Cavallaro, Joseph R.; Aazhang, Behnaam (1999-03-20)
      Multiple access interference (MAI) is a significant limiting factor in the performance of direct sequence code division multiple access (DS-CDMA) systems. Various multiuser detection techniques have been developed to combat ...
    • Partially Blind Multiuser Receivers for CDMA Systems 

      Das, Suman; Bhashyam, Srikrishna; Cavallaro, Joseph R.; Aazhang, Behnaam (1999-12-20)
      Multiple access interference (MAI) significantly limits the performance of code-division multiple access (CDMA) systems. Existing multiuser receivers combat MAI using the knowledge of either all (conventional) or none ...
    • Partially Coherent Constellations for Multiple-Antenna Systems 

      Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam; Varshney, Prabodh (2003-11-20)
      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 

      Borran, Mohammad Jaber; Sabharwal, Ashutosh; Aazhang, Behnaam (2004-01-15)
      We consider multiple-antenna 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 

      Ribeiro, Vinay Joseph; Riedi, Rudolf H.; Baraniuk, Richard G.; Navratil, Jiri; Cottrell, Les (2003-04-01)
      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 "self-induced congestion," PathChirp features an exponential ...
    • PC-OPT: Optimal Offline Prefetching and Caching for Parallel I/O Systems 

      Kallahalla, Mahesh; Varman, Peter J. (2002-11)
      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 ...
    • Peer to Peer Collaboration using Connexions 

      Henry, Geneva; Baraniuk, Richard G. (2004-06-01)
      No abstract.
    • Performance - Complexity Comparison of Receivers for a LTE MIMO–OFDM System 

      Ketonen, Johanna; Juntti, Markku; Cavallaro, Joseph R. (2010-06-01)
      Implementation of receivers for spatial multiplexing multiple-input multiple-output (MIMO) orthogonal-frequency-division-multiplexing (OFDM) systems is considered. The linear minimum mean-square error (LMMSE) and the K-best ...
    • Performance Analysis and Optimization of a Hybrid Seismic Imaging Application 

      Paul, Sri Raj; Araya-Polo, Mauricio; Mellor-Crummey, John; Hohl, Detlef (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 ...