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Low Complexity Detection for Spatial Modulation Aided Sparse Code Division Multiple Access
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DOI：10.1109/TVT.2021.3121128.png)
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Abstract
En 中文
Low-complexity detectors are conceivedfor the spatial modulation-aided sparse code-division multiple-access (SM-SCDMA). Firstly, the approximate message passing (AMP) algorithm is adapted for the detection of SM-SCDMA, which has less than 1% detection complexity of the state-of-the-art message passing-aided (MPA) detection albeit at a bit error ratio (BER) degradation. Therefore, inspired by the benefits of interference cancellation (IC) and the unique characteristics of SM, an enhanced AMP (EAMP) detector is proposed for mitigating BER degradation without increasing the detection complexity. Finally, the classic expectation propagation (EP) is intrinsically amalgamated with our EAMP detector, leading to a novel EAMP-EP detector, which further reduces the detection complexity of the EAMP algorithm. The three detectors are compared both in terms of their coded and uncoded BER, as well as complexity.
Keywords:
Detectors
Complexity theory
Multiaccess communication
Decoding
Quadrature amplitude modulation
Degradation
Codes
Spatial modulation (SM)
sparse code-division multiple-access (SCDMA)
nonorthogonal multiple access (NOMA)
approximate message passing (AMP) detection
Journal
IF:
7.1
Papers:
1.8W
Citations:
6.6W