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Combined Variable Active Antenna Spatial Modulation and NOMA to Enhance Spectral Efficiency for Multiple Users MIMO Systems

Vinh, T.V. and Hiep, P.T. and Phuong, N.T. (2022) Combined Variable Active Antenna Spatial Modulation and NOMA to Enhance Spectral Efficiency for Multiple Users MIMO Systems. In: Conference of 15th International Conference on Advanced Technologies for Communications, ATC 2022, 20 October 2022 Through 22 October 2022, Hanoi.

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Abstract

In multi-user multiple input multiple output (MIMO) systems, the non-orthogonal multiple access (NOMA) method based spatial modulation (SM) and generalized spatial modulation (GSM) can mitigate inter-user interference. However, the spectral efficiency of these methods is restricted because of antenna configuration. In this paper, a combination of the variable active antenna spatial modulation (VASM) scheme with the downlink power domain NOMA system, so-called NOMA-VASM, is proposed to improve spectral efficiency while main-taining mitigation of inter-user interference. In the novel NOMA-VASM, the antenna configuration is arbitrary and the number of enabled transmitting antennas (TAs) can be altered, so it is easier to increase spectral efficiency compared to NOMA-SM and NOMA-GSM. Monte Carlo simulations were performed under various scenarios, and the results showed that NOMA-VASM outperformed conventional NOMA-SM and NOMA-GSM in terms of spectral efficiency, average bit-error-rate (ABER) performance, and required number of TAs. © 2022 IEEE.

Item Type: Conference or Workshop Item (Paper)
Divisions: Faculties > Faculty of Radio-Electronic Engineering
Identification Number: 10.1109/ATC55345.2022.9943045
Uncontrolled Keywords: Antennas; Bit error rate; Intelligent systems; MIMO systems; Modulation; Monte Carlo methods; Multiple access interference, Active antennas; Average bit-error rates; Average bit-error-rate; Multiple access; Multiple-Input Multiple- Output systems; Non-orthogonal; Non-orthogonal multiple access; Spatial modulations; Spectral efficiencies; Variable active antenna spatial modulation, Spectrum efficiency
Additional Information: Conference of 15th International Conference on Advanced Technologies for Communications, ATC 2022 ; Conference Date: 20 October 2022 Through 22 October 2022; Conference Code:184412
URI: http://eprints.lqdtu.edu.vn/id/eprint/10616

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