A Throughput-Based Adaptive MIMO-BICM
Approach for Spatially-Correlated Channels
M. R. McKay, I B. Collings, A. Forenza, and R. W. Heath Jr.
Submitted to the IEEE Int. Conf. on Comm., 11-15 June 2006, Istanbul, Turkey
This paper considers low complexity transmission for MIMO bit-interleaved coded modulation (BICM) in spatially correlated Rayleigh channels. We consider both statistical beamforming (SB) and spatial-multiplexing with a zero-forcing (ZF) receiver. We derive tight closed-form bit error rate (BER) expressions based on a saddlepoint approximation. We then propose a practical adaptive algorithm which selects, based on the analytical results, the combination of code-rate, modulation format, and MIMO transmission scheme (SB or ZF) that maximizes throughput whilst maintaining a pre-defined BER.
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