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Iterative Detection and Decoding Algorithms using LDPC Codes for MIMO Systems in Block-Fading Channels (1505.00511v1)

Published 4 May 2015 in cs.IT and math.IT

Abstract: We propose iterative detection and decoding (IDD) algorithms with Low-Density Parity-Check (LDPC) codes for Multiple Input Multiple Output (MIMO) systems operating in block-fading and fast Rayleigh fading channels. Soft-input soft-output minimum mean-square error receivers with successive interference cancellation are considered. In particular, we devise a novel strategy to improve the bit error rate (BER) performance of IDD schemes, which takes into account the soft \textit{a posteriori} output of the decoder in a block-fading channel when Root-Check LDPC codes are used. A MIMO IDD receiver with soft information processing that exploits the code structure and the behavior of the log likelihood ratios is also developed. Moreover, we present a scheduling algorithm for decoding LDPC codes in block-fading channels. Simulations show that the proposed techniques result in significant gains in terms of BER for both block-fading and fast-fading channels.

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Authors (3)
  1. André Uchoa (1 paper)
  2. Cornelius T. Healy (1 paper)
  3. Rodrigo C. de Lamare (96 papers)
Citations (138)

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