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Space-time trellis code (STTC) has been widely applied to coded multiple-input multiple-output (MIMO) systems because of its gains in coding and diversity; however, its great decoding complexity makes it less promising in chip realization compared to the space-time block code (STBC). The complexity of STTC decoding lies in the branch metric calculation in the Viterbi algorithm and increases significantly...
Viterbi algorithm is the basic technique for space- time trellis codes (STTC) decoding. The received information affected by the channel impairments can be corrected by the path record determined by accumulating the branch metrics in the state transitions. However, the computation complexity of the branch metric accumulation in STTC Viterbi decoding is extremely high in spite of the well error-correction...
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