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A list layered space-time approach for MIMO detection

This paper describes a layered space-time (LST) approach for multiple-input multiple-output (MIMO) channels where list decisions of each data substream are used to subtract interference when detecting the next data substream. We study this approach in the context of the IEEE 802.11 standard using orthogonal frequency-division multiplexing (OFDM) and bit-interleaved coded modulation of each subcarrier. We show that ideal list LST with increased list size can potentially approach the MIMO Shannon bound, but performance of real implementation based on a reduced-complexity demapper is limited by competing Euclidean distances common in any reduced-state maximum likelihood detection.