Progressive MIMO-OFDM Reception Over Time-Varying Underwater Acoustic Channels

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Executive Summary

MIMO-OFDM has been actively studied for high data rate communications over the bandwidth-limited UnderWater Acoustic (UWA) channels. Unlike existing receivers that treat the InterCarrier Interference (ICI) as additive noise, in this paper, the authors deal with ICI explicitly together with the Co-Channel Interference (CCI) due to parallel transmissions in MIMO-OFDM. The proposed receiver has the following components: Compressed-Sensing (CS) based sparse channel estimation, soft-input-soft-output MMSE/Markov Chain Monte Carlo (MCMC) detector for interference mitigation, and non-binary LDPC decoding.

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