Designing enhanced multi-dimensional constellations for code-domain NOMA
Designing enhanced multi-dimensional constellations for code-domain NOMA
This letter presents an enhanced design of multi-dimensional (MD) constellations which play a pivotal role in many communication systems such as code-domain non-orthogonal multiple access (CD-NOMA). MD constellations are attractive as their structural properties, if properly designed, lead to signal space diversity and hence improved error rate performance. Unlike the existing works which mostly focus on MD constellations with large minimum Euclidean distance (MED), we look for new MD constellations with additional feature that the minimum product distance (MPD) is also large. To this end, a non-convex optimization problem is formulated and then solved by the convex-concave procedure (CCCP). Compared with the state-of-the-art literature, our proposed MD constellations lead to significant error performance enhancement over Rayleigh fading channels whilst maintaining almost the same performance over the Gaussian channels. To demonstrate their application, we also show that these MD constellations give rise to good codebooks in sparse code multiple access systems.
2130-2134
Wen, Haifeng
53884694-3c13-40dc-a9ab-8eceaa798a63
Liu, Zilong
43660480-cfa6-4045-97b6-3860330914af
Luo, Qu
0ed56b87-2a2c-4d94-83d2-3c2d9847b966
Shi, Chuang
c46f72bd-54c7-45ee-ac5d-285691fccf81
Xiao, Pei
4fe33422-75e3-44d1-a2d2-8feb12f28d66
Wen, Haifeng
53884694-3c13-40dc-a9ab-8eceaa798a63
Liu, Zilong
43660480-cfa6-4045-97b6-3860330914af
Luo, Qu
0ed56b87-2a2c-4d94-83d2-3c2d9847b966
Shi, Chuang
c46f72bd-54c7-45ee-ac5d-285691fccf81
Xiao, Pei
4fe33422-75e3-44d1-a2d2-8feb12f28d66
Wen, Haifeng, Liu, Zilong, Luo, Qu, Shi, Chuang and Xiao, Pei
(2022)
Designing enhanced multi-dimensional constellations for code-domain NOMA.
IEEE Wireless Communications Letters, 11 (10), .
(doi:10.1109/LWC.2022.3194604).
Abstract
This letter presents an enhanced design of multi-dimensional (MD) constellations which play a pivotal role in many communication systems such as code-domain non-orthogonal multiple access (CD-NOMA). MD constellations are attractive as their structural properties, if properly designed, lead to signal space diversity and hence improved error rate performance. Unlike the existing works which mostly focus on MD constellations with large minimum Euclidean distance (MED), we look for new MD constellations with additional feature that the minimum product distance (MPD) is also large. To this end, a non-convex optimization problem is formulated and then solved by the convex-concave procedure (CCCP). Compared with the state-of-the-art literature, our proposed MD constellations lead to significant error performance enhancement over Rayleigh fading channels whilst maintaining almost the same performance over the Gaussian channels. To demonstrate their application, we also show that these MD constellations give rise to good codebooks in sparse code multiple access systems.
Text
Design_MC_v5WCL
- Accepted Manuscript
More information
Accepted/In Press date: 21 July 2022
e-pub ahead of print date: 28 July 2022
Identifiers
Local EPrints ID: 483690
URI: http://eprints.soton.ac.uk/id/eprint/483690
ISSN: 2162-2337
PURE UUID: dfdcc87e-b3c1-423c-971c-4666a5ba2e85
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Date deposited: 03 Nov 2023 17:54
Last modified: 18 Mar 2024 04:13
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Contributors
Author:
Haifeng Wen
Author:
Zilong Liu
Author:
Qu Luo
Author:
Chuang Shi
Author:
Pei Xiao
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