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Practical soft demapper-based decoder for sparse code multiple access

Existing SCMA systems presented for multiuser detection has high computational complexity. The complexity is a prime concern considering its implementation in a machine-to-machine (M2M) communication involving limited capacity devices. Since these devices have low processing power, so practical impl...

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Main Authors:	Hussain, Syed Aamer, Ahmad, Norulhusna, Anwar, Khoirul
Format:	Conference or Workshop Item
Published:	2022
Subjects:	T Technology (General)
Online Access:	http://eprints.utm.my/id/eprint/100466/ http://dx.doi.org/10.1109/APCC55198.2022.9943721
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id	my.utm.100466
record_format	eprints
spelling	my.utm.1004662023-04-14T01:59:26Z http://eprints.utm.my/id/eprint/100466/ Practical soft demapper-based decoder for sparse code multiple access Hussain, Syed Aamer Ahmad, Norulhusna Anwar, Khoirul T Technology (General) Existing SCMA systems presented for multiuser detection has high computational complexity. The complexity is a prime concern considering its implementation in a machine-to-machine (M2M) communication involving limited capacity devices. Since these devices have low processing power, so practical implementation of SCMA needs to be optimised for better performance. This paper proposes an SCMA decoder with a soft demapping technique to reduce the computational complexity, providing better performance. To improve the stability of SCMA system for M2M communication, this paper proposes the use of noise variance threshold ?, to handle the system's stability. Results confirmed that the proposed soft demapper-based SCMA reduced the execution time to 33% and the iteration number to 63% compared to the conventional SCMA scheme deploying message passing algorithm (MPA)-based decoding. The proposed SCMA provides an improvement of 2.5 dB at a BER of 10-3 under the block Rayleigh fading channels and an improvement of approximately 1.1 dB at a BER of 10-5 dB under the fast Rayleigh fading channels. The improvements come from the fast convergence of iterative decoding using a soft demapper supported by a variance threshold ? that avoids the duality decision at the border of the decision area. 2022 Conference or Workshop Item PeerReviewed Hussain, Syed Aamer and Ahmad, Norulhusna and Anwar, Khoirul (2022) Practical soft demapper-based decoder for sparse code multiple access. In: 27th Asia-Pacific Conference on Communications, APCC 2022, 19 - 21 October 2022, Jeju Island, South Korea. http://dx.doi.org/10.1109/APCC55198.2022.9943721
institution	Universiti Teknologi Malaysia
building	UTM Library
collection	Institutional Repository
continent	Asia
country	Malaysia
content_provider	Universiti Teknologi Malaysia
content_source	UTM Institutional Repository
url_provider	http://eprints.utm.my/
topic	T Technology (General)
spellingShingle	T Technology (General) Hussain, Syed Aamer Ahmad, Norulhusna Anwar, Khoirul Practical soft demapper-based decoder for sparse code multiple access
description	Existing SCMA systems presented for multiuser detection has high computational complexity. The complexity is a prime concern considering its implementation in a machine-to-machine (M2M) communication involving limited capacity devices. Since these devices have low processing power, so practical implementation of SCMA needs to be optimised for better performance. This paper proposes an SCMA decoder with a soft demapping technique to reduce the computational complexity, providing better performance. To improve the stability of SCMA system for M2M communication, this paper proposes the use of noise variance threshold ?, to handle the system's stability. Results confirmed that the proposed soft demapper-based SCMA reduced the execution time to 33% and the iteration number to 63% compared to the conventional SCMA scheme deploying message passing algorithm (MPA)-based decoding. The proposed SCMA provides an improvement of 2.5 dB at a BER of 10-3 under the block Rayleigh fading channels and an improvement of approximately 1.1 dB at a BER of 10-5 dB under the fast Rayleigh fading channels. The improvements come from the fast convergence of iterative decoding using a soft demapper supported by a variance threshold ? that avoids the duality decision at the border of the decision area.
format	Conference or Workshop Item
author	Hussain, Syed Aamer Ahmad, Norulhusna Anwar, Khoirul
author_facet	Hussain, Syed Aamer Ahmad, Norulhusna Anwar, Khoirul
author_sort	Hussain, Syed Aamer
title	Practical soft demapper-based decoder for sparse code multiple access
title_short	Practical soft demapper-based decoder for sparse code multiple access
title_full	Practical soft demapper-based decoder for sparse code multiple access
title_fullStr	Practical soft demapper-based decoder for sparse code multiple access
title_full_unstemmed	Practical soft demapper-based decoder for sparse code multiple access
title_sort	practical soft demapper-based decoder for sparse code multiple access
publishDate	2022
url	http://eprints.utm.my/id/eprint/100466/ http://dx.doi.org/10.1109/APCC55198.2022.9943721
_version_	1764222570956062720
score	13.211869

Practical soft demapper-based decoder for sparse code multiple access

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