Result: Unified approach to single- and multi-antenna Turbo-TCM : Union bound and constituent code optimization over AWGN and fading channels
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Further Information
Unified approach to distance spectrum interpretation (DS) of single- and multi-antenna Turbo trellis coded modulations (Turbo-TCMs) is introduced in this paper to analyze the performance and optimize constituent TCMs for AWGN and fading channels. The union bound (UB) on frame-error-rate (FER) and bit-error-rate (BER) appeared as rather tight. Further DS optimization produced the new set of constituent TCMs for the robust single-antenna Turbo-TCM. Compared to existing Robertson et al. Turbo-TCM, more than 1dB and 5dB gains are achieved in the error floor region over AWGN and fast fading channel, respectively. Single-antenna Turbo-TCM was further concatenated with inner space-time block code (STBC) and compared to previously optimized multi-antenna or space-time (ST) Turbo-TCM. Achieving the same spectral efficiency with lower decoding complexity, ST-Turbo-TCM offers additional 1dB and 1.5dB gains over quasi-static and fast fading channel, respectively.