Uplink Non-Orthogonal Multiple Access With Golden Codeword Constellation

Non-orthogonal multiple access (NOMA) is a technique to improve spectral efficiency. In uplink NOMA (UL-NOMA) systems, mobile multiusers are globally synchronized to share the same time and frequency resources, and transmit their own independent symbols to the base station (BS). This paper proposes...

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Autores principales:	Hongjun Xu, Narushan Pillay
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Dynamic signal detection subset fast essentially ML detection golden code golden codeword non-orthogonal multiple access QR decomposition based detection Electrical engineering. Electronics. Nuclear engineering TK1-9971
Acceso en línea:	https://doaj.org/article/0c519395cc6c4610b014abb68e3dd9d1
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id	oai:doaj.org-article:0c519395cc6c4610b014abb68e3dd9d1
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spelling	oai:doaj.org-article:0c519395cc6c4610b014abb68e3dd9d12021-11-18T00:06:41ZUplink Non-Orthogonal Multiple Access With Golden Codeword Constellation2169-353610.1109/ACCESS.2021.3126454https://doaj.org/article/0c519395cc6c4610b014abb68e3dd9d12021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9606715/https://doaj.org/toc/2169-3536Non-orthogonal multiple access (NOMA) is a technique to improve spectral efficiency. In uplink NOMA (UL-NOMA) systems, mobile multiusers are globally synchronized to share the same time and frequency resources, and transmit their own independent symbols to the base station (BS). This paper proposes an UL-NOMA system with Golden codeword constellation (GCC). In the proposed UL-NOMA system, two users, the center user and the edge user, transmit their own independent Golden codewords to the BS. Compared to the conventional UL-NOMA systems, the proposed UL-NOMA system not only preserves the spectral efficiency, but also improves error performance. The fast essentially maximum likelihood (FE-ML) detection with dynamic signal detection subset (DSDS) is proposed to decode the Golden codewords. A lower bound on error performance for both the center user and edge user is further derived. Simulation results show that the derived lower bound well predicts the error performance of UL-NOMA with GCC. Simulation results also show that the proposed UL-NOMA system outperforms the conventional UL-NOMA system by at least 2 dB signal-to-noise ratio (SNR) for both the center user and edge user at a bit error rate of <inline-formula> <tex-math notation="LaTeX">$2 \times 10^{-5}$ </tex-math></inline-formula>. Finally, both complexity analysis and simulation results show that the proposed FE-ML with DSDS result in a 68% complexity reduction compared to the FE-ML with SDS at an SNR of 23 dB for the center user transmitting 64QAM and the edge user transmitting 16QAM.Hongjun XuNarushan PillayIEEEarticleDynamic signal detection subsetfast essentially ML detectiongolden codegolden codewordnon-orthogonal multiple accessQR decomposition based detectionElectrical engineering. Electronics. Nuclear engineeringTK1-9971ENIEEE Access, Vol 9, Pp 150966-150974 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Dynamic signal detection subset fast essentially ML detection golden code golden codeword non-orthogonal multiple access QR decomposition based detection Electrical engineering. Electronics. Nuclear engineering TK1-9971
spellingShingle	Dynamic signal detection subset fast essentially ML detection golden code golden codeword non-orthogonal multiple access QR decomposition based detection Electrical engineering. Electronics. Nuclear engineering TK1-9971 Hongjun Xu Narushan Pillay Uplink Non-Orthogonal Multiple Access With Golden Codeword Constellation
description	Non-orthogonal multiple access (NOMA) is a technique to improve spectral efficiency. In uplink NOMA (UL-NOMA) systems, mobile multiusers are globally synchronized to share the same time and frequency resources, and transmit their own independent symbols to the base station (BS). This paper proposes an UL-NOMA system with Golden codeword constellation (GCC). In the proposed UL-NOMA system, two users, the center user and the edge user, transmit their own independent Golden codewords to the BS. Compared to the conventional UL-NOMA systems, the proposed UL-NOMA system not only preserves the spectral efficiency, but also improves error performance. The fast essentially maximum likelihood (FE-ML) detection with dynamic signal detection subset (DSDS) is proposed to decode the Golden codewords. A lower bound on error performance for both the center user and edge user is further derived. Simulation results show that the derived lower bound well predicts the error performance of UL-NOMA with GCC. Simulation results also show that the proposed UL-NOMA system outperforms the conventional UL-NOMA system by at least 2 dB signal-to-noise ratio (SNR) for both the center user and edge user at a bit error rate of <inline-formula> <tex-math notation="LaTeX">$2 \times 10^{-5}$ </tex-math></inline-formula>. Finally, both complexity analysis and simulation results show that the proposed FE-ML with DSDS result in a 68% complexity reduction compared to the FE-ML with SDS at an SNR of 23 dB for the center user transmitting 64QAM and the edge user transmitting 16QAM.
format	article
author	Hongjun Xu Narushan Pillay
author_facet	Hongjun Xu Narushan Pillay
author_sort	Hongjun Xu
title	Uplink Non-Orthogonal Multiple Access With Golden Codeword Constellation
title_short	Uplink Non-Orthogonal Multiple Access With Golden Codeword Constellation
title_full	Uplink Non-Orthogonal Multiple Access With Golden Codeword Constellation
title_fullStr	Uplink Non-Orthogonal Multiple Access With Golden Codeword Constellation
title_full_unstemmed	Uplink Non-Orthogonal Multiple Access With Golden Codeword Constellation
title_sort	uplink non-orthogonal multiple access with golden codeword constellation
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/0c519395cc6c4610b014abb68e3dd9d1
work_keys_str_mv	AT hongjunxu uplinknonorthogonalmultipleaccesswithgoldencodewordconstellation AT narushanpillay uplinknonorthogonalmultipleaccesswithgoldencodewordconstellation
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Uplink Non-Orthogonal Multiple Access With Golden Codeword Constellation

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