Now showing items 997-1016 of 1050

  • VALID: Custom ASIC Verification and FPGA Education Platform 

    Murphy, Patrick; Welsh, Erik; Frantz, Patrick; Hardy, Ricky; Mohsenin, Tinoosh; Cavallaro, Joseph R. (2003-06-01)
    This paper describes VALID, a platform for testing student designed ASICs and for teaching the basics of FPGA design. VALID is designed to maximize ease of use from a student?s perspective while maintaining enough flexibility ...
  • Variable-Rate Universal Slepian-Wolf Coding with Feedback 

    Sarvotham, Shriram; Baron, Dror; Baraniuk, Richard G. (2005-11-01)
    Traditional Slepian-Wolf coding assumes known statistics and relies on asymptotically long sequences. However, in practice the statistics are unknown, and the input sequences are of finite length. In this finite regime, ...
  • VITURBO: A Reconfigurable Architecture for Ubiquitous Wireless Networks 

    Vaya, Mani (2002-08-01)
    A run-time reconfigurable architecture for ubiquitous wireless networks has been designed and implemented. Reconfigurable architectures have the ability to change themselves dynamically thus presenting a viable proposition ...
  • VITURBO: A Reconfigurable Architecture for Viterbi and Turbo Decoding 

    Cavallaro, Joseph R.; Vaya, Mani (2003-04-20)
    A runtime reconfigurable architecture for high speed Viterbi and Turbo decoding is designed and implemented on an FPGA. The architecture can be reconfigured to decode a range of convolutionally coded data with constraint ...
  • VLSI Architectures and Rapid Prototyping Testbeds for Wireless Systems 

    Cavallaro, Joseph R. (2005-06-01)
    The rapid evolution of wireless access is creating an ever changing variety of standards for indoor and outdoor environments. The real-time processing demands of wireless data rates in excess of 100 Mbps is a challenging ...
  • VLSI Architectures for Multitier Wireless Systems 

    Cavallaro, Joseph R. (1999-11-20)
    Next-generation computing systems will be highly integrated using wireless networking. The Rice Everywhere NEtwork (RENÃ ) project is exploring the integration of WCDMA cellular systems, high speed wireless LANs, and home ...
  • VLSI Decoder Architecture for High Throughput, Variable Block-size and Multi-rate LDPC Codes 

    Sun, Yang; Karkooti, Marjan; Cavallaro, Joseph R. (2007-05-01)
    A low-density parity-check (LDPC) decoder architecture that supports variable block sizes and multiple code rates is presented. The proposed architecture is based on the structured quasi-cyclic (QC-LDPC) codes whose ...
  • VLSI Implementation of a CORDIC SVD Processor 

    Cavallaro, Joseph R.; Keleher, Michael P.; Price, Russell H.; Thomas, Gregory S. (1991-06-20)
    The design and custom CMOS VLSI implementation of a CORDIC SVD processor is presented. Special-purpose parallel processor arrays have many important applications in real-time signal processing. The processor architecture ...
  • VLSI Implementation of Mallat's Fast Discrete Wavelet 

    Guo, Yuanbin; Zhang, Hongzhou; Wang, Xuguang; Cavallaro, Joseph R. (2001-11-20)
    This paper proposes a novel VLSI architecture to compute the DWT (discrete wavelet transform) coefficients using Mallat's algorithm with reduced complexity. We studied the commonality embedded in the mirror filters of the ...
  • VLSI implementation of the multistage detector for next generation wideband CDMA receivers 

    Xu, Gang; Rajagopal, Sridhar; Cavallaro, Joseph R.; Aazhang, Behnaam (2002-03-20)
    The multistage detection algorithm has been proposed as an effective interference cancellation scheme for next generation Wideband Code Division Multiple Access (W-CDMA) base stations. In this paper, we propose a real-time ...
  • Voltage tuning of vibrational mode energies in single-molecule junctions 

    Li, Yajing; Doak, Peter; Kronik, Leeor; Neaton, Jeffrey B.; Natelson, Douglas (2014)
    Vibrational modes of molecules are fundamental properties determined by intramolecular bonding, atomic masses, and molecular geometry, and often serve as important channels for dissipation in nanoscale processes. Although ...
  • Volterra Filter Identification Using Penalized Least Squares 

    Nowak, Robert David (1996-05-20)
    Volterra filters have been applied to many nonlinear system identification problems. However, obtaining good filter estimates from short and/or noisy data records is a difficult task. We propose a penalized least squares ...
  • W-CDMA real-time algorithm implementation and evaluation 

    Jones, Bryan Allen (2000-05-20)
    This paper describes a platform to enable and explore the design and implementation of next-generation CDMA wireless base stations. A DSP and FPGA-based multiprocessor board is integrated into a Simulink-based wireless ...
  • WARP, a Modular Testbed for Configurable Wireless Network Research at Rice 

    Amiri, Kiarash; Sun, Yang; Murphy, Patrick; Hunter, Chris; Cavallaro, Joseph R.; Sabharwal, Ashutosh (2007-03-01)
    Wireless Open-Access Research Platform (WARP), developed at CMC lab, Rice University, provides a scalable and configurable platform for wireless network research. Its programmability and flexibility makes it easy to prototype ...
  • WARP, a UnifiedWireless Network Testbed for Education and Research 

    Amiri, Kiarash; Sun, Yang; Murphy, Patrick; Hunter, Chris; Cavallaro, Joseph R.; Sabharwal, Ashutosh (2007-06-01)
    In this paper, we introduce the Wireless Open-Access Research Platform (WARP) developed at CMC lab, Rice University. WARP provides a scalable and configurable platform mainly designed to prototype wireless communication ...
  • Warped Perspectives in Time Frequency Analysis 

    Baraniuk, Richard G. (1994-10-01)
    Unitary similarity transformations furnish a simple yet powerful vehicle for generating new classes of joint distributions based on concepts different from time, frequency, and scale. These new signal representations ...
  • Warped Wavelet Bases: Unitary Equivalence and Signal Processing 

    Baraniuk, Richard G.; Jones, Douglas L. (1993-04-01)
    The notions of time, frequency, and scale are generalized using concepts from unitary operator theory and applied to time-frequency analysis, in particular the wavelet and short-time Fourier transform orthonormal bases and ...
  • Wavelength encoding to reduce four-wave mixing crosstalk in multi-wavelength channels 

    Guo, Yuanbin; Aazhang, Behnaam; Young, James F. (1996-10-20)
    The trend toward higher bit rates in lightwave communications has increased interest in dispersion-shifted fiber (DSF) to minimize dispersion penalties. In addition, wavelength-division multiplexing (WDM) is being used to ...
  • Wavelet -Based Statistical Signal Processing using Hidden Markov Models 

    Crouse, Matthew; Nowak, Robert David; Baraniuk, Richard G. (1998-04-01)
    Wavelet-based statistical signal processing techniques such as denoising and detection typically model the wavelet coefficients as independent or jointly Gaussian. These models are unrealistic for many real-world signals. ...
  • Wavelet Analysis of Fractional Brownian Motion in Multifractal Time 

    Goncalves, Paulo; Riedi, Rudolf H. (1999-09-20)
    We study <i>fractional Brownian motions in multifractal time</i>, a model for multifractal processes proposed recently in the context of economics. Our interest focuses on the statistical properties of the wavelet decomposition ...