access icon free Simple near-maximum-likelihood low-complexity detection scheme for Alamouti space-time block coded spatial modulation

Space-time block coded spatial modulation (STBC–SM) has been proposed to exploit the advantages of both spatial modulation and space-time block codes. The first objective of this study is to introduce a very simple near-maximum-likelihood (ML) low-complexity detection scheme for N t × N r M-ary quadrature amplitude modulation (M-QAM) STBC–SM. Simulation results validate that the proposed simple detection scheme achieves near-ML detection error performance. Furthermore, in comparison to existing schemes, the computational complexity of the proposed detector was demonstrated to be independent of the modulation size, hence exhibiting a very low computational complexity. The second objective of this study is to present an asymptotic bound to quantify the average bit-error rate performance of M-QAM STBC–SM over independent and identically distributed Rayleigh flat fading channels. The analytical frameworks are validated by Monte Carlo simulations.

Inspec keywords: error statistics; maximum likelihood detection; Monte Carlo methods; computational complexity; space-time block codes; quadrature amplitude modulation; Rayleigh channels

Other keywords: asymptotic bound; M-ary quadrature amplitude modulation; modulation size; average bit-error rate performance; independent-identically distributed Rayleigh flat fading channel; Alamouti space-time block coded spatial modulation; M-QAM STBC-SM; simple-near-maximum-likelihood low-complexity detection scheme; computational complexity; Monte Carlo simulation; near-ML detection error performance

Subjects: Radio links and equipment; Codes; Signal detection; Monte Carlo methods

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