Now showing items 510-529 of 1050

  • M-Band Multiwavelet Systems 

    Burrus, C. Sidney; Fernandes, Felix (1999-03-20)
    In this paper we investigate multiwavelet systems whose scaling functions have disjoint support. We demonstrate that, with the exception of a trivial case, this property may not be attained by two band multiwavelet systems. ...
  • Macroscopic Ensembles of Aligned Carbon Nanotubes in Bubble Imprints Studied by Polarized Raman Microscopy 

    Ushiba, Shota; Hoyt, Jordan; Masui, Kyoko; Kono, Junichiro; Kawata, Satoshi; Shoji, Satoru (2014)
    We study the alignment of single-wall carbon nanotubes (SWCNTs) in bubble imprints through polarized Raman microscopy. A hemispherical bubble containing SWCNTs is pressed against a glass substrate, resulting in an imprint ...
  • Magnitude Squared Design of Recursive Filters with the Chebyshev Norm Using a Constrained Rational Remez Algorithm 

    Selesnick, Ivan W.; Lang, Markus; Burrus, C. Sidney (1994-05-01)
    We describe a Remez type exchange algorithm for the design of stable recursive filters for which the Chebyschev norm of H(w) - F(w) is minimized, where H(w) and F(w) are the realized and desired magnitude squared frequency ...
  • Magnitude Squared Design of Recursive Filters with the Chebyshev Norm Using a Constrained Rational Remez Algorithm 

    Selesnick, Ivan W.; Lang, Markus; Burrus, C. Sidney (1994-10-01)
    We describe a Remez type exchange algorithm for the design of stable recursive filters for which the Chebyschev norm of H(w) - F(w) is minimized, where H(w) and F(w) are the realized and desired magnitude squared frequency ...
  • Magnitude Weighting and Time Segmentation for Phase-Only Reconstruction of Signals 

    Merchant, G.A.; Parks, T.W. (1981-04-01)
    Phase-only reconstruction of signals and its application to blind-deconvolution were introduced recently by Oppenheim, and by Hayes, et.al. In this report, we briefly present another description of this phase-only ...
  • Marginals vs. Covariance in Joint Distribution Theory 

    Baraniuk, Richard G. (1995-05-01)
    Recently, Cohen has proposed a method for constructing joint distributions of arbitrary physical quantities, in direct generalization of joint time-frequency representations. In this paper, we investigate the covariance ...
  • A Markov Chain Analysis of Blackjack Strategy 

    Wakin, Michael; Rozell, Chris (2004-07-01)
    Blackjack receives considerable attention from mathematicians and entrepreneurs alike, due to its simple rules, its inherent random nature, and the abundance of "prior" information available to an observant player. Many ...
  • A Massively Parallel Implementation of QC-LDPC Decoder on GPU 

    Wang, Guohui; Wu, Michael; Sun, Yang; Cavallaro, Joseph R. (2011-06-01)
    The graphics processor unit (GPU) is able to provide a low-cost and flexible software-based multi-core architecture for high performance computing. However, it is still very challenging to efficiently map the real-world ...
  • A Mathematical Model of the Vagally Driven SA Nodal Pacemaker 

    Greco, E.C.; Clark, Jr., J.W. (1975-01-20)
    A model is developed for the vagal control of SA nodal activity in the heart and consists essentially of a modified bonhoeffer-Van der Pol (BVP) model of the "free-running" SA node and a lumped model of the neural terminations ...
  • Matrix Based Computation of Floating-Point Roundoff Noise 

    Van Veen, Barry D.; Baraniuk, Richard G. (1989-12-01)
    A matrix based procedure is presented for computing the output roundoff noise power for filters implemented with floating-point arithmetic. The filter's computational structure is represented in terms of a product of ...
  • Maximum Likelihood Multipath Channel Parameter Estimation in CDMA Systems 

    Sengupta, Chaitali; Hottinen, Ari; Cavallaro, Joseph R.; Aazhang, Behnaam (1998-03-01)
    The problem addressed in this paper is the estimation of the channel parameters in a Code Division Multiple Access(CDMA) communication system, in the presence of multipath effects. Maximum likelihood estimation of these ...
  • Maximum Likelihood Multipath Channel Parameter Estimation in CDMA Systems Using Antenna Arrays 

    Sengupta, Chaitali; Cavallaro, Joseph R.; Aazhang, Behnaam (1998-09-20)
    The problem addressed in this paper is the estimation of the chan-nel parameters in a Code Division Multiple Access (CDMA) communication system, in the presence of multipath effects and multiple sensors at the base station ...
  • Maximum Weight Basis Decoding of Convolutional Codes 

    Das, Suman; Erkip, Elza; Cavallaro, Joseph R.; Aazhang, Behnaam (2000-06-20)
    The effectiveness of the convolutional code increases with the constraint length of the code. Unfortunately the decoding complexity of Viterbi algorithm grows exponentially with the constraint length. In this paper we ...
  • Maximum Weight Basis Decoding of Convolutional Codes 

    Das, Suman; Erkip, Elza; Cavallaro, Joseph R.; Aazhang, Behnaam (2002-11-01)
    In this paper we describe a new suboptimal decoding technique for linear codes based on the calculation of maximum weight basis of the code. The idea is based on estimating the maximum number locations in a codeword which ...
  • A Maxwell’s fish eye lens for the terahertz region 

    Liu, Jingbo; Mendis, Rajind; Mittleman, Daniel M. (2013-07-15)
    We implement a two-dimensional Maxwell’s fish eye lens using a waveguide-based artificial dielectric. The Maxwell’s fish eye lens consists of two metallic cylindrical plates sandwiching a free-space region, with the inner ...
  • Measurement Driven Deployment of a Two-Tier Urban Mesh Access Network 

    Camp, Joseph; Robinson, Joshua; Steger, Christopher; Knightly, Edward (2006-06-01)
    Multihop wireless mesh networks can provide Internet access over a wide area with minimal infrastructure expenditure. In this work, we present a measurement driven deployment strategy and a data-driven model to study the ...
  • Measurement of Filling-Factor-Dependent Magnetophonon Resonances in Graphene Using Raman Spectroscopy 

    Kim, Y.; Poumirol, J. M.; Lombardo, A.; Kalugin, N. G.; Georgiou, T.; Kim, Y. J.; Novoselov, K. S.; Ferrari, A. C.; Kono, J.; Kashuba, O.; Fal’ko, V. I.; Smirnov, D. (2013-05-29)
    We perform polarization-resolved Raman spectroscopy on graphene in magnetic fields up to 45 T. This reveals a filling-factor-dependent, multicomponent anticrossing structure of the Raman G peak, resulting from magnetophonon ...
  • Measurements vs. Bits: Compressed Sensing meets Information Theory 

    Sarvotham, Shriram; Baron, Dror; Baraniuk, Richard G. (2006-09-01)
    Compressed sensing is a new framework for acquiring sparse signals based on the revelation that a small number of linear projections (measurements) of the signal contain enough information for its reconstruction. The ...
  • Measuring Time-Frequency Information and Complexity using the Renyi Entropies 

    Baraniuk, Richard G.; Flandrin, Patrick; Michel, Olivier (1995-09-01)
    In search of a nonparametric indicator of deterministic signal complexity, we link the Renyi entropies to time-frequency representations. The resulting measures show promise in several situations where concepts like the ...
  • Measuring Time-Frequency Information Content using the Renyi Entropies 

    Baraniuk, Richard G.; Flandrin, Patrick; Janssen, A. J. E. M.; Michel, Olivier (2001-05-01)
    The generalized entropies of Renyi inspire new measures for estimating signal information and complexity in the time-frequency plane. When applied to a time-frequency representation (TFR) from Cohen's class or the affine ...