Andr P. Des Rosiers

CSU Mentor, Long Beach, California, United States

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Publications (6)1.75 Total impact

  • Source
    A.P. des Rosiers, P.H. Siegel
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    ABSTRACT: We evaluate truncated union bounds on the frame-error rate (FER) performance of space-time (ST) codes operating over the quasi-static fading channel and compare them with computer simulation results. We consider both ST trellis and block codes. We make the following contributions. For the case of ST trellis codes, we develop a general method, which we denote as measure spectrum analysis, that characterizes ST codeword differences and accommodates the combined influences of the ST code and channel scenario. We propose a numerical bounding method that converges in the measure spectrum to within a very small fraction of a decibel to the simulated FER over the full range of signal-to-noise ratio. In addition, we demonstrate the existence of dominant quasi-static fading error events and detail a method for predicting them. Using only this set of dominant measure spectrum elements, very rapid and tight numerical estimation of FER performance is attained.
    IEEE Transactions on Communications 11/2004; · 1.75 Impact Factor
  • Source
    A.P. des Rosiers, P.H. Siegel
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    ABSTRACT: We evaluate truncated union bounds on the frame error rate performance of space-time (ST) codes operating over the quasistatic fading channel and compare them to the results from computer simulation. Both ST trellis and block codes are considered. We calculate these bounds by characterizing the set of codeword differences from a general expression for the exact pairwise error probability (PEP). We discussed in detail the significantly tighter numerical bound for quasistatic fading and demonstrate the code properties that account for this tightness. Using this improved bound we show empirical evidence that for some codes a set of dominant error events characterize the FER performance. We also compare these performance results to outage capacity.
    Communications, 2003. ICC '03. IEEE International Conference on; 06/2003
  • Andr P. Des Rosiers, Paul H. Siegel
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    ABSTRACT: In this paper, weevaluate truncated union bounds on the frame error rate #FER# performance of selected space-time codes for three di#erent channel scenarios and compare them to results of computer simulation. Channels with AWGN, uncorrelated Rayleigh fading, and blockRayleigh fading are considered.
    12/2000;
  • Source
    Anders Ranheim, Andr P. Des Rosiers, Paul H. Siegel
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    ABSTRACT: An iterative receiver is proposed for a wireless communication system employing multiple transmit and receive antennas. The transmitted symbol sequences are space-time encoded. By exploiting the inherent structure in the space-time encoded data sequence, the receiver is able to signi#cantly improve the initial estimate of the unknown channel leading to significant performance gains in terms of the bit-error-rate #BER# as a function of the signal-to-noise ratio #SNR#. Computer simulations demonstrate the e#cacy of the scheme in single-user and multi-user environments.
    12/2000;
  • Source
    Andr P. Des Rosiers, Member Ieee, Paul H. Siegel, Fellow Ieee
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    ABSTRACT: This paper presents a theoretical analysis of the effect of constellation shaping in the transmitter on multimodulus (MMA) blind equalization in the receiver. Constellation shaping reduces average signal energy by a non-uniform distribution of constellation point utilization. Optimal transmit efficiency is achieved by a Gaussian distribution but many blind equalization algorithms require a non-Gaussian source. We demonstrate, using complex constellations, MMA convergence failure as a Gaussian source kurtosis is approached. Our generalized cost function analysis of the related constant modulus algorithm (CMA) for complex constellations identifies the mechanism of the MMA convergence failure. We introduce a new design procedure for determining the kurtosis-specific MMA moduli and present simulation results that illustrate MMA convergence properties for varying source kurtosis.
    12/2000;
  • Source
    A. Ranheim, A.P. des Rosiers, P.H. Siegel
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    ABSTRACT: An iterative receiver is proposed for a wireless communication system employing multiple transmit and receive antennas. The transmitted symbol sequences are space-time encoded. By exploiting the inherent structure in the space-time encoded data sequence, the receiver is able to significantly improve the initial estimate of the unknown channel leading to significant performance gains in terms of the bit-error-rate (BER) as a function of the signal-to-noise ratio (SNR). Computer simulations demonstrate the efficacy of the scheme in single-user and multi-user environments.
    Signals, Systems and Computers, 2000. Conference Record of the Thirty-Fourth Asilomar Conference on; 02/2000

Publication Stats

14 Citations
215 Views
1.75 Total Impact Points

Institutions

  • 2003
    • CSU Mentor
      • Department of Electrical & Computer Engineering
      Long Beach, California, United States
  • 2000
    • Chalmers University of Technology
      • Department of Signals and Systems
      Göteborg, Vaestra Goetaland, Sweden