MIMO-OFDM Optimal Decoding and Achievable Information Rates Under Imperfect Channel EstimationReport as inadecuate




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1 L2S - Laboratoire des signaux et systèmes

Abstract : Optimal decoding of bit interleaved coded modulation BICM MIMO-OFDM where an imperfect channel estimate is available at the receiver is investigated. First, by using a Bayesian approach involving the channel a posteriori density, we derive a practical decoding metric for general memoryless channels that is robust to the presence of channel estimation errors. Then, we evaluate the outage rates achieved by a decoder that uses our proposed metric. The performance of the proposed decoder is compared to the classical mismatched decoder and a theoretical decoder defined as the best decoder in the presence of imperfect channel estimation. Numerical results over Rayleigh block fading MIMO-OFDM channels show that the proposed decoder outperforms mismatched decoding in terms of bit error rate and outage capacity without introducing any additional complexity.

Keywords : MIMO-OFDM Improved Iterative Detection Mismatched Detection improved ML decoding metric Outage Capacity Achieved Throughputs Achievable rates Imperfect Channel Estimation





Author: Sajad Sadough - Pablo Piantanida - Pierre Duhamel -

Source: https://hal.archives-ouvertes.fr/



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