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Space-Time Block Coded Differential Spatial Modulation With Permutations
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DOI：10.1109/TCOMM.2026.3672167.png)
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Abstract
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Differential spatial modulation (DSM) is a noncoherent multi-antenna technique that conveys additional information by selecting transmit antennas. Space-time block coded DSM (STBC-DSM) combines DSM with STBC to achieve a transmit diversity order of two. Recently, we proposed a new STBC-DSM scheme that improves spectral efficiency through temporal permutations, termed bandwidth-efficient generalized DSM (BE-GDSM). This paper enhances BE-GDSM in two key aspects: either reducing detection complexity or increasing spectral efficiency. We propose a maximum-likelihood (ML) detector with significantly lower computational complexity for BE-GDSM. Besides, we introduce spatial permutations for STBC-DSM and demonstrate that such permutations require differential encoding. Building on this observation, we propose STBC-DSM with joint spatial and temporal permutations (STBC-DSM-JSTP), which achieves the maximal number of antenna bits among all STBC-DSM schemes. Numerical results show that STBC-DSM-JSTP improves error performance compared with BE-GDSM at the same data rate.
Keywords:
Differential spatial modulation
low-complexity detection
space-time block coding
spectral efficiency
Journal
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8.3
Papers:
1.2W
Citations:
3.6W
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