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1. 航天工程大学研究生院,北京 101416
2. 航天工程大学电子与光学工程系,北京 101416
[ "雷拓峰(1998- ),男,陕西咸阳人,航天工程大学博士生,主要研究方向为非正交多址技术、衰落信道码字设计、启发式优化算法" ]
[ "倪淑燕(1981- ),女,河北邢台人,博士,航天工程大学副教授,主要研究方向为通信与信息系统" ]
[ "程乃平(1963- ),男,陕西咸阳人,博士,航天工程大学教授、博士生导师,主要研究方向为飞行器测控通信" ]
[ "宋鑫(1995- ),男,山西临汾人,航天工程大学博士生,主要研究方向为信道编码技术" ]
网络出版日期:2022-04,
纸质出版日期:2022-04-25
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雷拓峰, 倪淑燕, 程乃平, 等. 瑞利衰落信道下SCMA码本设计[J]. 通信学报, 2022,43(4):107-113.
Tuofeng LEI, Shuyan NI, Naiping CHENG, et al. SCMA codebooks design for Rayleigh fading channel[J]. Journal on communications, 2022, 43(4): 107-113.
雷拓峰, 倪淑燕, 程乃平, 等. 瑞利衰落信道下SCMA码本设计[J]. 通信学报, 2022,43(4):107-113. DOI: 10.11959/j.issn.1000-436x.2022064.
Tuofeng LEI, Shuyan NI, Naiping CHENG, et al. SCMA codebooks design for Rayleigh fading channel[J]. Journal on communications, 2022, 43(4): 107-113. DOI: 10.11959/j.issn.1000-436x.2022064.
为了设计近似最优的稀疏码本,以多用户叠加星座点的误符号率性能为评价指标,分别针对上行、下行传输信道,设计了适用于瑞利衰落信道的近似最优稀疏码本。基于叠加星座点与误符号率的数学模型,提出了一种近似最优稀疏码本的设计方案,码本的设计步骤包括因子图矩阵的设计、码字对的匹配以及最优旋转角度的确定。仿真结果表明,所提码本设计方案能够达到近似最优的误符号率性能。
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.
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AL-AHMADI S . On the achievable max-min rates of cooperative power-domain NOMA systems [J ] . IEEE Access , 2020 , 8 : 173112 - 173122 .
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YADAV A , QUAN C , VARSHNEY P K , et al . On performance comparison of multi-antenna HD-NOMA,SCMA,and PD-NOMA schemes [J ] . IEEE Wireless Communications Letters , 2021 , 10 ( 4 ): 715 - 719 .
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LEI T F , NI S Y , CHENG N P , et al . SCMA-OFDM codebook design based on IRM [C ] // Proceedings of 2021 International Wireless Com munications and Mobile Computing (IWCMC) . Piscataway:IEEE Press , 2021 : 735 - 739 .
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张晨晨 . 稀疏码分多址系统的多用户检测算法研究和码本设计 [D ] . 上海:上海交通大学 , 2018 .
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ZHANG C C , LUO Y , CHEN Y . A low-complexity SCMA detector based on discretization [J ] . IEEE Transactions on Wireless Communications , 2018 , 17 ( 4 ): 2333 - 2345 .
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