| 摘要: |
| 针对混合非正交多址接入（NOMA）的认知无线电网络的下行链路，以主用户的干扰功率阈值、次用户最小信息速率以及子信道复用用户数为约束条件，建立信道和功率资源分配的优化问题模型，提出了一种公平性可调的信道分配方法，得到信道和用户的匹配结果；采用凸近似和Charnes-Cooper变换的方法，得到复用用户的功率分配值.仿真结果表明，给定基站总功率为25 dBm时，所提信道分配算法的用户公平性指数提升了50%. |
| 关键词: 非正交多址接入(NOMA) 认知无线电 信道分配 功率分配 能效 |
| DOI：10.3969/J.ISSN.1000-5137.2021.01.010 |
| 分类号:TN929.5 |
| 基金项目:上海市科委地方院校能力建设项目（19070502900） |
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| Research on channel and power allocation of cognitive radio network based on hybrid NOMA |
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WU Jingfang, LI Li, XIONG Zhimeng, ZHOU Xiaoping
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College of Information, Mechanical and Electrical Engineering, Shanghai Normal University, Shanghai 200234, China
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| Abstract: |
| For the downlink of the cognitive radio network with hybrid non-orthogonal multiple access(NOMA), the improved model for channel and power resource allocation were established with the constraints of the primary user's interference power threshold, the secondary user's minimum information rate, and the number of subchannel multiplexing users. To optimize the problem model, a channel allocation method with adjustable fairness was proposed to obtain the matching result between the channel and the user. The convex approximation and the Charnes-Cooper transformation method were used to obtain the power allocation value of the multiplexing users. The simulation results showed that when the total power of the base station was 25 dBm, the user fairness index of the channel allocation algorithm proposed in this paper was improved by 50%. |
| Key words: non-orthogonal multiple access(NOMA) cognitive radio channel allocation power allocation energy efficiency |
