| 非正交多址接入系统中的联合中继选择和用户配对算法 |
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| 引用本文： | 吴春林,李慧芳,李靖.非正交多址接入系统中的联合中继选择和用户配对算法[J].电子科技,2020,33(7):37-40. |
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| 作者姓名： | 吴春林 李慧芳 李靖 |
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| 作者单位： | 1.海军航空大学 青岛校区,山东 青岛 266041;2.西安电子科技大学 综合业务网理论及关键技术国家重点实验室,陕西 西安 710071 |
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| 基金项目： | 国家自然科学基金(61771367) |
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| 摘 要： | 针对多用户NOMA中继系统,文中提出了一种联合中继选择和用户配对算法。该算法首先利用最小距离准则选择最优次级用户与主用户配对,然后进行最优中继选择来改善系统中断性能。根据系统模型的分析,推导了系统中断概率的准确表达式,并分析了高信噪比条件下的渐近中断性能。系统分集阶数的研究说明了所提NOMA中继系统相比于传统单中继NOMA系统的优越性。最后,蒙特卡洛仿真结果验证了理论分析的正确性。
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| 关 键 词： | NOMA 中继选择 用户配对 中断概率 蒙特卡洛仿真 分集阶数 |
| 收稿时间： | 2019-05-09 |
Joint Relay Selection and User Pairing for Non-Orthogonal Multiple Access Systems |
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| WU Chunlin,LI Huifang,LI Jing.Joint Relay Selection and User Pairing for Non-Orthogonal Multiple Access Systems[J].Electronic Science and Technology,2020,33(7):37-40. |
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| Authors: | WU Chunlin LI Huifang LI Jing |
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| Affiliation: | 1. Qingdao Campus,Naval Aeronautical University,Qingdao 266041,China;2. State Key Laboratory of Integrated Services Networks,Xidian University,Xi’an 710071, China |
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| Abstract: | This paper proposed a joint relay selection and user pairing algorithm for the multi-user NOMA relay system. The algorithm firstly selected the best secondary user to pair with the primary user by using the shortest distance criterion and then performed the best relay selection to improve the system outage performance. According to the analysis of the system model, the system outage probability expression was derived in closed-form and the asymptotic outage expression was analyzed under high SNR regime. The derived system diversity order demonstrated the superiority of the proposed NOMA relay system compared to the traditional single-relay NOMA system. Finally, the correctness of theoretical analysis was validated by the Monte Carlo simulation results. |
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| Keywords: | NOMA relay selection user pairing outage probability Monte Carlo simulation diversity order |
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