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SAIEE Africa Research Journal

On-line version ISSN 1991-1696
Print version ISSN 0038-2221


BALMAHOON, Tarika  and  XU, Hongjun. Instantaneous bit error rate based ASM scheme for MPSK spatial modulation. SAIEE ARJ [online]. 2018, vol.109, n.4, pp.208-216. ISSN 1991-1696.

In this paper, we propose an instantaneous bit error rate (IBER) based adaptive spatial modulation (ASM) scheme for the M-ary phase shift keying (MPSK) constellation (ASM-MPSK). In the proposed ASM-MPSK system, the combination of MPSK modulation order and number of transmit antennas is chosen based on the one that yields the smallest IBER while keeping the average transmission bit rate (TBR) constant. Furthermore, a low complexity maximum likelihood (ML) detection scheme for MPSK SM is employed which significantly reduces the complexity of the proposed system compared with other adaptive modulation schemes that use the high complexity ML detector for detection. Additionally, in this paper, we also analyse the computational complexity for the proposed ASM-MPSK. The simulation results indicate that the proposed scheme provides a significant improvement in terms of the error performance compared to conventional MPSK SM systems under a particular TBR; for TBR = 5 bits/s/Hz, a performance gain of approximately 4 dB had been achieved at a BER of 1 X 10-6.

Keywords : Adaptive spatial modulation; bit error rate; MIMO; MPSK modulation.

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