Now showing items 145-164 of 1854

    • Approximation and Compression of Piecewise Smooth Images Using a Wavelet/Wedgelet Geometric Model 

      Romberg, Justin; Wakin, Michael; Baraniuk, Richard G. (2003-09-01)
      Inherent to photograph-like images are two types of structures: large smooth regions and geometrically smooth edge contours separating those regions. Over the past years, efficient representations and algorithms have been ...
    • APPROXIMATION AND DECOMPOSITION OF FUNCTIONS AND DISTRIBUTIONS BASED ON PRONY METHOD 

      HU, CHIA-LING (1980)
      This dissertation presents certain extensions and applications of the Prony method both in real and complex domains. First, a recursive algorithm for the conventional (time domain) Prony method is developed for finding the ...
    • Architectural, Numerical and Implementation Issues in the VLSI Design of an Integrated CORDIC-SVD Processor 

      Kota, Kishore (1991-05-20)
      The Singular Value Decomposition (SVD) is an important matrix factorization with applications in signal processing, image processing and robotics. This thesis presents some of the issues involved in the design of an array ...
    • Architectural, numerical and implementation issues in the VLSI design of an integrated CORDIC-SVD processor 

      Kota, Kishore (1991)
      This thesis describes the design of a systolic array for computing the Singular Value Decomposition (SVD) based on the Brent, Luk, Van Loan array. The use of COordinate Rotation DIgital Computer (CORDIC) arithmetic results ...
    • Architecture and Algorithm for a Stochastic Soft-output MIMO Detector 

      Amiri, Kiarash; Radosavljevic, Predrag; Cavallaro, Joseph R. (2007-11-04)
      In this paper, we propose a novel architecture for a soft-output stochastic detector in multiple-input, multiple-output (MIMO) systems. The stochastic properties of this detector are studied and derived in this work, ...
    • Architecture and Algorithm for a Stochastic Soft-output MIMO Detector 

      Amiri, Kiarash; Radosavljevic, Predrag; Cavallaro, Joseph R. (2007-11-01)
      In this paper, we propose a novel architecture for a soft-output stochastic detector in multiple-input, multiple-output (MIMO) systems. The stochastic properties of this detector are studied and derived in this work, and ...
    • Architecture and Algorithms for Scalable Mobile QoS 

      Sadeghi, Bahareh (2000-04-20)
      We develop a simple analytical model to study the system and illustrate several key components of the approach. We formulate the problem of how to group the cells to form the virtual system as an optimization problem and ...
    • Architecture and algorithms for scalable mobile QoS 

      Sadeghi, Bahareh (2000)
      Supporting Quality of Service is an important objective for future mobile systems, and requires resource reservation and admission control to achieve. In this thesis, we introduce a scalable scheme to admission control ...
    • ARCHITECTURE DESIGN AND IMPLEMENTATION OF THE INCREASING RADIUS - LIST SPHERE DETECTOR ALGORITHM 

      Myllylä, Markus; Juntti, Markku; Cavallaro, Joseph R. (2009-04-01)
      A list sphere detector (LSD) is an enhancement of a sphere detector (SD) that can be used to approximate the optimal MAP detector. In this paper, we introduce a novel architecture for the increasing radius (IR)-LSD algorithm, ...
    • Architecture Design and Implementation of the Metric First List Sphere Detector Algorithm 

      Myllylä, Markus; Cavallaro, Joseph R.; Juntti, Markku (2011-05-01)
      Soft-output detection of a multiple-input–multiple-output (MIMO) signal pose a significant challenge in future wireless systems. In this paper, we introduce a soft-output modified metric first (MMF)-LSD algorithm for MIMO ...
    • Architecture for detection in MIMO wireless systems 

      Amiri, Kiarash (2007)
      In this work, we study two main classes of detectors for spatially multiplexed Multiple-input Multiple-output (MIMO) systems. For the first group, i.e. hard-decision detectors, we study sphere detectors, and propose novel ...
    • An Architecture for Distributed Wavelet Analysis and Processing in Sensor Networks 

      Wagner, Raymond; Baraniuk, Richard G.; Du, Shu; Johnson, David B.; Cohen, Albert (2006-04-01)
      Distributed wavelet processing within sensor networks holds promise for reducing communication energy and wireless bandwidth usage at sensor nodes. Local collaboration among nodes de-correlates measurements, yielding a ...
    • Architectures for a CORDIC SVD Processor 

      Cavallaro, Joseph R.; Luk, Franklin T. (1986-08-21)
      Architectures for systolic array processor elements for calculating the singular value decomposition (SVD) are proposed. These special purpose VLSI structures incorporate the coordinate rotation (CORDIC) algorithms to ...
    • Architectures for Cognitive Radio Testbeds and Demonstrators – An Overview 

      Gustafsson, Oscar; Amiri, Kiarash; Andersson, Dennis; Blad, Anton; Bonner, Christian; Cavallaro, Joseph R.; Declerck, Jeroen; Dejonghe, Antoine; Eliardsson, Patrik; Glasse, Miguel; Hayar, Aawatif; Hollevoet, Lieven; Hunter, Chris; Joshi, Madhura; Kaltenberger, Florian; Knopp, Raymond; Le, Khanh; Miljanic, Zoran; Murphy, Patrick; Naessens, Frederik; Nikaein, Navid; Nussbaum, Dominique; Pacalet, Renaud; Raghavan, Praveen; Sabharwal, Ashutosh; Sarode, Onkar; Spasojevic, Predrag; Sun, Yang; Tullberg, Hugo M.; Vander Aa, Tom; Van der Perre, Liesbet; Wetterwald, Michelle; Wu, Michael (2010-06-01)
      Wireless communication standards are developed at an ever-increasing rate of pace, and significant amounts of effort is put into research for new communication methods and concepts. On the physical layer, such topics include ...
    • Architectures for Heterogeneous Multi-Tier Networks 

      Cavallaro, Joseph R. (2002-01-15)
      Next-generation wireless computing platforms will contain flexible communications capabilites. At Rice University, the Rice Everywhere NEtwork (RENE) project is investigating a multi-standard, multi-tier integration of ...
    • Argos: Practical Base Stations for Large-scale Beamforming 

      Shepard, Clayton (2012-09-05)
      MU-MIMO theory predicts manyfold capacity gains by leveraging many antennas (e.g. M >> 10) on wireless base stations to serve many users simultaneously through multi-user beamforming (MUBF). However, realizing such a ...
    • Arithmetic Acceleration Techniques for Wireless Communication Receivers 

      Das, Suman; Rajagopal, Sridhar; Sengupta, Chaitali; Cavallaro, Joseph R. (1999-10-20)
      We develop techniques to accelerate the implementation of the next generation wireless communication algorithms in hardware. We discuss an implementation of a key computationally intensive baseband algorithm for joint ...
    • ASIC Implementation Comparison of SIC and LSD Receivers for MIMO-OFDM 

      Ketonen, Johanna; Myllylä, Markus; Juntti, Markku; Cavallaro, Joseph R. (2008-10-01)
      MIMO-OFDM receivers with horizontal encoding are considered in this paper. The successive interference cancellation (SIC) algorithm is compared to the K-best list sphere detector (LSD). A modification to the K-best LSD ...
    • ASIP Architecture for Future Wireless Systems: Flexibility and Customization 

      Cavallaro, Joseph R.; Radosavljevic, Predrag (2004-06-01)
      Efficiency and flexibility are crucial features of the processors in the next generation of wireless cellular systems. Processors need to be efficient in order to satisfy real-time requirements for very demanding algorithms ...
    • ASIP Architecture Implementation of Channel Equalization Algorithms for MIMO Systems in WCDMA Downlink 

      Radosavljevic, Predrag; Cavallaro, Joseph R.; de Baynast, Alexandre (2004-09-01)
      This paper presents a customized and flexible hardware implementation of linear iterative channel equalization algorithms for WCDMA downlink transmission in 3G wireless system with multiple transmit and receive antennas ...