瑞利衰落信道下SCMA码本设计

doi:10.11959/j.issn.1000-436x.2022064

Abstract

Abstract:

According to the symbol error eate (SER) of the superimposed constellation, the near-optimal space code multiple access (SCMA) codebooks were explored under uplink and downlink Rayleigh fading channels, respectively.A near-optimal codebook design scheme was proposed based on the mathematical model between the superimposed constellation and the SER formula.And the proposed design procedures could be summarized as follows, design the factor graph matrix, match the best codeword pair, and find the optimal angle.Numerical results are provided to demonstrate that the proposed scheme can achieve near-optimal SER performance.

Key words: sparse code multiple access, near-optimal codebook, Rayleigh fading channel, symbol error rate

CLC Number:

TN914.5

Tuofeng LEI, Shuyan NI, Naiping CHENG, Xin SONG. SCMA codebooks design for Rayleigh fading channel[J]. Journal on Communications, 2022, 43(4): 107-113.

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References 19

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参数	值
频率数目K	4
用户数目L	6
调制阶数M	4（QPSK）
用户节点度数d_v	2
频率节点度数d_f	3
信道模型	瑞利衰落信道
解码算法	MPA
帧长度/bit	100
仿真次数/次	10 000

SCMA codebooks design for Rayleigh fading channel

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