非理想串行干扰消除下的非正交多址接入系统性能可控的中继选择技术

doi:10.1007/s12204-022-2529-z

J Shanghai Jiaotong Univ Sci ›› 2024, Vol. 29 ›› Issue (6): 1181-1190.doi: 10.1007/s12204-022-2529-z

非理想串行干扰消除下的非正交多址接入系统性能可控的中继选择技术

杜云海，李恩玉，马隆

（青岛理工大学信息与控制工程学院，山东青岛266525）

收稿日期:2021-06-07 接受日期:2022-01-07 出版日期:2024-11-28 发布日期:2024-11-28

Performance-Controlled Relay Selection for Non-Orthogonal Multiple Access System Under Imperfect Successive Interference Cancellation

DU Yunhai (杜云海), LI Enyu^∗ (李恩玉), MA Long (马隆)

(School of Information and Control Engineering, Qingdao University of Technology, Qingdao 266525, Shandong, China)

Received:2021-06-07 Accepted:2022-01-07 Online:2024-11-28 Published:2024-11-28

摘要/Abstract

摘要： 为了提高非正交多址（NOMA）系统的性能，研究了具有两个非对称用户的下行NOMA系统。针对在一些实际传输场景中两个用户对可靠性的要求可能不同的情况，提出了远近两用户性能可控的最大-最小中继选择策略。在该策略中，根据实际的传输要求，两个用户的中断性能可以通过该系统的不同设置来控制。鉴于实际场景中非理想串行干扰消除的影响，分析了系统远近两用户的精确中断性能，并得到了高信噪比下的近似结果。在近似结果分析的基础上，得到了这两个用户中断性能最优的功率分配因子。最后，通过仿真分析验证了理论结果的正确性。

关键词: 非正交多址接入, 协作通信, 中断概率, 功率分配, 瑞利衰落

Abstract: In order to improve the performance of non-orthogonal multiple access (NOMA) system, a downlink NOMA system with two symmetric users is investigated. By noting that the requirement of reliability for these two users is different in some practical transmission scenarios, a performance-controlled max-min relay selection scheme for near-user and far-user is proposed. According to the practical transmission requirements, the outage performance of these two users can be controlled by different settings in the considered system. Considering the influence of the imperfect successive interference cancellation (SIC) in the practical scenarios, the exact outage performance of the far and near users in the system is analyzed, and the approximation results in high signalto-noise ratio are also obtained. Based on the analysis of the approximate results, the optimal power allocation factor for the outage performance of these two users is obtained. Finally, the correctness of the theoretical results is verified by simulation analysis.

中图分类号:

TN929.5

杜云海, 李恩玉, 马隆. 非理想串行干扰消除下的非正交多址接入系统性能可控的中继选择技术[J]. J Shanghai Jiaotong Univ Sci, 2024, 29(6): 1181-1190.

DU Yunhai (杜云海), LI Enyu^∗ (李恩玉), MA Long (马隆). Performance-Controlled Relay Selection for Non-Orthogonal Multiple Access System Under Imperfect Successive Interference Cancellation[J]. J Shanghai Jiaotong Univ Sci, 2024, 29(6): 1181-1190.

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非理想串行干扰消除下的非正交多址接入系统性能可控的中继选择技术

Performance-Controlled Relay Selection for Non-Orthogonal Multiple Access System Under Imperfect Successive Interference Cancellation

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