Now showing items 533-552 of 1097

    • Lower Bounds on the Capacity of Gaussian Relay Channel 

      Khojastepour, Mohammad; Sabharwal, Ashutosh; Aazhang, Behnaam (2004-03-01)
      It has been shown recently that the overall throughput of dense wireless networks can increase significantly when wireless nodes collaborate in transmission of different packets. In this paper, we focus on a simple network ...
    • A Lower Worst-Case Complexity for Searching a Dictionary 

      Hirschberg, D.S. (1978-07-20)
      It is shown that k(p+3)/2 + p-2 letter comparisons suffice to determine whether a word is a member of a lexicographically ordered dictionary containing 2<sup>p</sup>-1 words of length k. This offers a potential savings ...
    • LTE uplink MIMO receiver with low complexity interference cancellation 

      Yin, Bei; Cavallaro, Joseph R. (2012-11-01)
      In LTE/LTE-A uplink receiver, frequency domain equalizers (FDE) are adopted to achieve good performance. However, in multi-tap channels, the residual inter-symbol and inter-antenna interference still exist after FDE ...
    • 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 ...
    • Markov analysis of multiple-disk prefetching strategies for external merging 

      Sadananda Pai, Vinay; Schaffer, Alejandro A.; Varman, Peter J. (1994-06-06)
      Multiple-disk organizations can be used to improve the I/O performance of problems like external merging. Concurrency can be introduced by overlapping I/O requests at different disks and by prefetching additional blocks ...
    • 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 ...