Computer Science – Networking and Internet Architecture
Scientific paper
2007-08-10
Dans The VIII IEEE Workshop on Signal Processing Advances in Wireless Communications - The VIII IEEE Workshop on Signal Proces
Computer Science
Networking and Internet Architecture
Scientific paper
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.
Duhamel Pierre
Piantanida Pablo
Sadough Sajad
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