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Space-time coded generalized spatial modulation for sparse code division multiple access

Space-time coded generalized spatial modulation for sparse code division multiple access
Space-time coded generalized spatial modulation for sparse code division multiple access
Space-time coded generalized spatial modulationaided sparse code division multiple access (STC/GSM-SCDMA) is proposed, which exploits the two-dimensional transmit diversity potential of both the spatial and of the frequency domain. Hence, it constitutes a promising solution for the pervasive connectivity of devices in next-generation nonorthogonal multiple access (NOMA) systems. More explicitly, our STC/GSM scheme achieves diversity in the spatial-domain, while the sparse signalspreading action of SCDMA results in frequency-domain (FD) diversity. A single-user bit error rate (BER) bound is derived as the benchmark of the BER performance of our STC/GSMSCDMA system. Furthermore, a pair of novel detectors, namely a bespoke message passing aided (MPA) detector and a tailormade approximate message passing (AMP) detector are conceived by designing a new factor graphs for our proposed STC/GSMSCDMA
system. The performance of these detectors is characterized in terms of their BER vs. complexity. Our simulation results show that the proposed AMP detector is capable of operating within 2 dB of the MPA detector’s signal-to-noise ratio (SNR) requirement, while supporting a normalized user load of 150%, despite its appealing low complexity, which is about 1000 times lower than the MPA detector.
1536-1276
Liu, Yusha
711a72e8-e8be-4be4-a79d-ea1413e7012a
Xiang, Luping
56d951c0-455e-4a67-b167-f6c8233343b1
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1
Liu, Yusha
711a72e8-e8be-4be4-a79d-ea1413e7012a
Xiang, Luping
56d951c0-455e-4a67-b167-f6c8233343b1
Yang, Lie-Liang
ae425648-d9a3-4b7d-8abd-b3cfea375bc7
Hanzo, Lajos
66e7266f-3066-4fc0-8391-e000acce71a1

Liu, Yusha, Xiang, Luping, Yang, Lie-Liang and Hanzo, Lajos (2021) Space-time coded generalized spatial modulation for sparse code division multiple access. IEEE Transactions on Wireless Communications. (In Press)

Record type: Article

Abstract

Space-time coded generalized spatial modulationaided sparse code division multiple access (STC/GSM-SCDMA) is proposed, which exploits the two-dimensional transmit diversity potential of both the spatial and of the frequency domain. Hence, it constitutes a promising solution for the pervasive connectivity of devices in next-generation nonorthogonal multiple access (NOMA) systems. More explicitly, our STC/GSM scheme achieves diversity in the spatial-domain, while the sparse signalspreading action of SCDMA results in frequency-domain (FD) diversity. A single-user bit error rate (BER) bound is derived as the benchmark of the BER performance of our STC/GSMSCDMA system. Furthermore, a pair of novel detectors, namely a bespoke message passing aided (MPA) detector and a tailormade approximate message passing (AMP) detector are conceived by designing a new factor graphs for our proposed STC/GSMSCDMA
system. The performance of these detectors is characterized in terms of their BER vs. complexity. Our simulation results show that the proposed AMP detector is capable of operating within 2 dB of the MPA detector’s signal-to-noise ratio (SNR) requirement, while supporting a normalized user load of 150%, despite its appealing low complexity, which is about 1000 times lower than the MPA detector.

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GSM-SCMA - Accepted Manuscript
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Accepted/In Press date: 17 March 2021

Identifiers

Local EPrints ID: 447881
URI: http://eprints.soton.ac.uk/id/eprint/447881
ISSN: 1536-1276
PURE UUID: e21903b7-5dea-4015-b39d-b73ec1e506a6
ORCID for Luping Xiang: ORCID iD orcid.org/0000-0003-1465-6708
ORCID for Lie-Liang Yang: ORCID iD orcid.org/0000-0002-2032-9327
ORCID for Lajos Hanzo: ORCID iD orcid.org/0000-0002-2636-5214

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Date deposited: 25 Mar 2021 18:19
Last modified: 26 Mar 2021 03:02

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