Open AccessRF mirror media‐based space‐time block coded spatial modulation techniques for two time‐slots
Author(s) -
Adejumobi Babatunde S.,
Pillay Narushan
Publication year - 2019
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2018.5161
Subject(s) - space–time block code , detector , block code , algorithm , computer science , modulation (music) , spatial modulation , computational complexity theory , quadrature amplitude modulation , bit error rate , mimo , electronic engineering , telecommunications , physics , beamforming , decoding methods , engineering , acoustics
Space‐time block coded spatial modulation (STBC‐SM) with cyclic structure (STBC‐CSM) employs cyclical rotation of activated transmit antenna pairs to transmit Alamouti codewords taken from two different constellation sets to improve the spectral efficiency of STBC‐SM. Furthermore, existing literature has shown that media‐based modulation (MBM), which employs radio frequency (RF) mirrors demonstrate significant improvement in error performance of wireless systems. Hence, this study proposes the application of MBM to STBC‐CSM and STBC‐SM in the form of media‐based STBC‐CSM (MBSTBC‐CSM) and MBSTBC‐SM, respectively. The theoretical framework of the union‐bound on average bit‐error probability of M ‐QAM MBSTBC‐CSM and MBSTBC‐SM, for the maximum‐likelihood (ML) detector is formulated and agrees well with Monte Carlo simulations. Furthermore, due to the large computational complexity of the ML detector, the authors propose a low‐complexity near‐ML detector for MBSTBC‐CSM and MBSTBC‐SM, which achieves a near‐ML bit error rate performance with 41 % reduction in computational complexity.