Wrapped space-time codes for quasi-static multiple-antenna channels

Caire, Giuseppe; Colavolpe, Giulio
WPMC 2001, International Symposium on Wireless Personal Multimedia Communications, September 9-12, 2001, Aalborg, Denmark

We propose a new space-time coding scheme for the quasi-static multiple-antenna channel with perfect channel state information at the receiver and no channel state information at the trans-mitter. The new scheme includes both trellis space-time codes and layered space-time codes as special cases. When the number of transmit antennas is not larger than the number of receive antennas our scheme can be efficiently decoded by min-imum mean-square error (MMSE) decision-feedback interfer-ence cancellation coupled with Viterbi decoding through the use of per-survivor processing (PSP). We discuss the code design for the new scheme, and show that finding codes with optimal diversity is much easier than for conventional trellis space-time codes. Our scheme yields a large performance gain with respect to coded V-BLAST of similar complexity, and it can be easily coupled with the recently proposed linear-dispersion precoding to handle the case of a number of receive antennas smaller than the number of transmit antennas.

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Systèmes de Communication
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