A low-complexity viterbi decoder for space-time trellis codes
IEEE Transactions on Circuits and Systems Part I: Regular Papers
Interlevel-correlated orthogonal space–time block codes based on the expanded signal constellation
Wireless Communications & Mobile Computing
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This paper proposes improved space-time multiple TCM (ST-MTCM) codes via a systematic expansion of space- time block code (STBC) for two transmit antennas. Starting from the orthogonal STBC, the STBC set is expanded into super- orthogonal STBC, and further expanded up to spatial multiplexing in the case of BPSK and QPSK constellations. Exploiting the expanded set of STBCs as the number of states increase, improved full diversity ST-MTCM codes can be designed by increasing the coding gain and Euclidean distance of the pairwise errors.