Spatial Modulation-Aided Cooperative NOMA: Performance Analysis and Comparative Study

The combination of non-orthogonal multiple access (NOMA) and multiple-input multiple-output (MIMO) signaling is capable of providing significantly improved spectral efficiency and effective multiple access. However, conventional MIMO-NOMA entails significantly increased power consumption and impleme...

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Bibliographic Details
Published in:IEEE journal of selected topics in signal processing 2019-06, Vol.13 (3), p.715-728
Main Authors: Li, Qiang, Wen, Miaowen, Basar, Ertugrul, Poor, H. Vincent, Chen, Fangjiong
Format: Article
Language:English
Subjects:
Antennas
Bit error rate
Codes
Comparative studies
cooperative relaying
Error detection
Interference
MIMO communication
Modulation
NOMA
non-orthogonal multiple access
Nonorthogonal multiple access
Power consumption
Relaying
Relays
Silicon carbide
spatial modulation
sum rate
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Summary:The combination of non-orthogonal multiple access (NOMA) and multiple-input multiple-output (MIMO) signaling is capable of providing significantly improved spectral efficiency and effective multiple access. However, conventional MIMO-NOMA entails significantly increased power consumption and implementation complexity. Inspired by the essence of spatial modulation (SM), in this paper, a novel three-node cooperative relaying system (CRS) using SM-aided NOMA, termed CRS-SM-NOMA, is proposed, in which the messages for two users are conveyed by two different information-bearing units of SM. As the reference scheme, conventional CRS-NOMA is further re-investigated with multiple receive antennas. Besides the achievable rate, which is adopted by most of the existing NOMA works as the performance metric, the bit error rate (BER) of CRS-SM-NOMA and CRS-NOMA is analyzed assuming maximum-likelihood detection. Approximate bit error probability expressions are derived in closed form for both users. Simulation results verify the analysis and show that the proposed CRS-SM-NOMA outperforms conventional CRS-NOMA and SM-OMA in terms of the BER as well as ergodic sum rate.
ISSN:1932-4553
1941-0484
DOI:10.1109/JSTSP.2019.2898099