Low-Complexity Decoder Based on Conditional ML for QOSTBC

作者：Nassaji Ehsan^*; Almasi Mojtaba Ahmadi; Fardad Mohammad

来源：IEEE Communications Letters, 2018, 22(8): 1548-1551.

DOI：10.1109/LCOMM.2018.2828825

• Quasi-orthogonal space-time code
• conditional ML decoder
• multi-input multi-output system
• bit error rate

In this letter, we present a new decoder for quasi-orthogonal space-time block code (QOSTBC) based on conditional maximum-likelihood (ML) decoder. The proposed decoder results in the decoding complexity of 0(/) ), where L is the constellation size. In addition, by decomposing the real and imaginary components of the received signals, we further reduce the complexity of the decoder. Unlike many of previous decoders proposed for QOSTBC, our decoder is compatible with any complex-valued constellation such as quadrature amplitude modulation. Furthermore, the advantage of the proposed decoder with respect to other decoders is analyzed in terms of preprocessing and detection complexity. The simulation results show the identical bit error rate performance of the proposed and conventional ML decoder.

• 出版日期2018-8