Now showing items 611-630 of 1726

    • Generalized Digital Butterworth Filter Design 

      Selesnick, Ivan W.; Burrus, C. Sidney (1996-01-15)
      This paper presents a formula-based method for the design of IIR filters having more zeros than (nontrivial) poles. The filters are designed so that their square magnitude frequency responses are maximally-flat at <i>m</i> ...
    • Generalized Joint Signal Representations and Optimum Detection 

      Sayeed, Akbar M.; Jones, Douglas L. (1996-01-20)
      Generalized joint signal representations (JSRs) extend the scope of joint time-frequency representations (TFRs) to a richer class of nonstationary signals, but their use, just as in the case of TFRs, has been primarily ...
    • Generalized likelihood ratio detection for fMRI using complex data 

      Nan, F.Y.; Nowak, Robert David (1999-04-20)
      The majority of fMRI studies obtain functional information using statistical tests based on the magnitude image reconstructions. Recently, a complex correlation (CC) test was proposed based on teh complex image data in ...
    • GENERALIZED REPLACEMENT IN ITERATIVE RESTORATION ALGORITHMS 

      BRZUSTOWICZ, THOMAS JUDE (1983)
      A new formulation of an iterative restoration algorithm is presented in this dissertation for the solution of noisy, non-linear restoration problems. The constraints and distortions are assumed to be known and are modeled ...
    • Generation of diffraction-free beams for applications in optical microlithography 

      Erdelyi, Miklos; Horvath, Zoltan L.; Szabo, Gabor; Bor, Zs.; Tittel, Frank K.; Cavallaro, Joseph R.; Smayling, Michael C. (1997-03-01)
      A new concept based on a Fabry–Perot interferometer for the generation of nondiffracting Bessel beams is described and proposed for potential applications in microlithography such as the fabrication of small isolated ...
    • Generation of nearly nondiffracting Bessel beams with a Fabry–Perot interferometer 

      Horvath, Zoltan L.; Erdelyi, Miklos; Szabo, Gabor; Bor, Zs.; Tittel, Frank K.; Cavallaro, Joseph R. (1997-11-01)
      A new concept for generating zero-order Bessel beams was studied theoretically. The spatial intensity distribution was calculated numerically using a wave optics model. Approximate analytical expressions were derived to ...
    • Genomic Detection Using Sparsity-inspired Tools 

      Sheikh, Mona A. (2011)
      Genome-based detection methods provide the most conclusive means for establishing the presence of microbial species. A prime example of their use is in the detection of bacterial species, many of which are naturally vital ...
    • A Geometric Hidden Markov Tree Wavelet Model 

      Romberg, Justin; Wakin, Michael; Choi, Hyeokho; Baraniuk, Richard G. (2003-08-01)
      In the last few years, it has become apparent that traditional wavelet-based image processing algorithms and models have significant shortcomings in their treatment of edge contours. The standard modeling paradigm exploits ...
    • Geometric Methods for Wavelet-Based Image Compression 

      Wakin, Michael; Romberg, Justin; Choi, Hyeokho; Baraniuk, Richard G. (2003-08-01)
      Natural images can be viewed as combinations of smooth regions, textures, and geometry. Wavelet-based image coders, such as the space-frequency quantization (SFQ) algorithm, provide reasonably efficient representations for ...
    • Geometric Tools for Image Compression 

      Wakin, Michael; Romberg, Justin; Choi, Hyeokho; Baraniuk, Richard G. (2002-11-01)
      Images typically contain strong geometric features, such as edges, that impose a structure on pixel values and wavelet coefficients. Modeling the joint coherent behavior of wavelet coefficients is difficult, and standard ...
    • Geometry Compression of Normal Meshes using Rate-Distortion Algorithms 

      Lavu, Sridhar; Choi, Hyeokho; Baraniuk, Richard G. (2003-06-01)
      We propose a new rate-distortion based algorithm for compressing 3D surface geometry represented using triangular normal meshes. We apply the Estimation-Quantization (EQ) algorithm to compress normal mesh wavelet coefficients. ...
    • GEOMETRY OF PARTIAL SUMS 

      READ, RANDOL ROBERT (1971)
    • Getting Real: A Naturalistic Methodology for Using Smartphones to Collect Mediated Communications 

      Tossell, Chad C.; Kortum, Philip; Shepard, Clayton W.; Rahmati, Ahmad; Zhong, Lin (2012)
      This paper contributes an intentionally naturalistic methodology using smartphone logging technology to study communications in the wild. Smartphone logging can provide tremendous access to communications data from real ...
    • Giant tunable Faraday effect in a semiconductor magneto-plasma for broadband terahertz polarization optics 

      Arikawa, Takashi; Wang, Xiangfeng; Belyanin, Alexey A.; Kono, Junichiro (2012)
      We report on a giant Faraday effect in an electron plasma in n- InSb probed via polarization-resolved terahertz (THz) time-domain spectroscopy. Polarization rotation angles and ellipticities reach as large as π/2 and ...
    • GNOMES: A Testbed for Low-Power Heterogeneous Wireless Sensor Networks 

      Welsh, Erik; Fish, Walt; Frantz, Patrick (2003-05-20)
      Continuing trends in sensor, semiconductor and communication systems technology (smaller, faster, cheaper) make feasible very dense networks of fixed and mobile wireless devices for use in many different sensing and ...
    • Gold nanoshells: Optical properties and femtosecond electron dynamics 

      Averitt, Richard Douglas (1998)
      The chemistry, optical properties, and femtosecond electron dynamics of gold nanoshells are described. The gold nanoshells consist of Au-coated Au$\sb2$S nanoparticles prepared via aqueous phase chemistry using HAuCl$\sb4$ ...
    • Golden-Eye: A server-side location-sensing system for wireless LANs 

      Tao, Ping (2004)
      Determining the location of a wireless client is a key problem for location-aware systems and for security applications. Many recent studies have used Bayesian methods to determine location from wireless LAN signals, but ...
    • GPU Accelerated Reconfigurable Detector and Precoder for Massive MIMO SDR Systems 

      Li, Kaipeng (2015-12-02)
      We present a reconfigurable GPU-based unified detector and precoder for massive MIMO software-defined radio systems. To enable high throughput, we implement the linear minimum mean square error detector/precoder and further ...
    • GPU Accelerated Scalable Parallel Decoding of LDPC Codes 

      Wang, Guohui; Wu, Michael; Sun, Yang (2011-11-01)
      This paper proposes a flexible low-density parity-check (LDPC) decoder which leverages graphic processor units (GPU) to provide high decoding throughput. LDPC codes are widely adopted by the new emerging standards for ...
    • A GPU Implementation of a Real-Time MIMO Detector 

      Wu, Michael; Gupta, Siddharth; Sun, Yang; Cavallaro, Joseph R. (2009-10-01)
      Multiple-input multiple-output (MIMO) is an existing technique that can significantly increase throughput of the system by employing multiple antennas at the transmitter and the receiver. Realizing maximum benefit from ...