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Design of Power-Imbalanced SCMA Codebook

Li, Xudong and Gao, Zhicheng and Gui, Yiming and Liu, Zilong and Xiao, Pei and Yu, Lisu (2022) 'Design of Power-Imbalanced SCMA Codebook.' IEEE Transactions on Vehicular Technology, 71 (2). pp. 2140-2145. ISSN 0018-9545 (In Press)

2010.03329.pdf - Accepted Version

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Sparse code multiple access (SCMA) is a promising multiuser communication technique for the enabling of future massive machine-type networks. Unlike existing codebook design schemes assuming uniform power allocation, we present a novel class of SCMA codebooks which display power imbalance among different users for downlink transmission. Based on the Star-QAM mother constellation structure and with the aid of genetic algorithm, we optimize the minimum Euclidean distance (MED) and the minimum product distance (MPD) of the proposed codebooks. Numerical simulation results show that our proposed codebooks lead to significantly improved error rate performances over Gaussian channels and Rayleigh fading channels.

Item Type: Article
Uncontrolled Keywords: Sparse code multiple access (SCMA); power imbalance; near-far effect; minimum Euclidean distance (MED); minimum product distance (MPD)
Divisions: Faculty of Science and Health
Faculty of Science and Health > Computer Science and Electronic Engineering, School of
SWORD Depositor: Elements
Depositing User: Elements
Date Deposited: 12 Oct 2021 08:26
Last Modified: 23 Sep 2022 19:47

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