一种改进的用户选择算法在NOMA系统下的应用
首发时间:2017-12-18
摘要:随着业务种类和需求的日趋多样,用户数量的急剧增加,5G通信已经走进人们的视野里。由于移动端数量的爆炸性增长,频谱资源越加稀缺,频谱效率已经成为5G的一个技术瓶颈。在这样的背景下,非正交多址接入(NOMA)技术应运而生。本文改进一种基于用户数目变化的比例公平调度算法,使其应用在NOMA场景下,并且结合迭代注水功率分配算法和FTPA功率分配算法实现用户间的功率分配。通过仿真分析,与传统的比例公平调度算法比较,在损失一定公平性的情况下,显著提升NOMA系统容量。
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Application of an Improved User Selection Algorithm in NOMA System
Abstract:With the increasing diversity of business types and needs, the number of users has dramatically increased, and 5G communications has entered into people's horizons. Due to the explosive growth of the number of mobile terminals, spectrum resources become more scarce and spectral efficiency has become a technical bottleneck of 5G. Under this background, non-orthogonal multiple access (NOMA) arises at the historic moment. In this paper, an improved proportional fairness scheduling algorithm is proposed based on the number of users to apply it in the NOMA scenario, and combine the iterative water-filling power allocation algorithm and the FTPA power allocation algorithm to realize the power allocation among users. Through the simulation results, compared with the traditional proportional fairness scheduling algorithm, the NOMA system capacity is significantly improved under the condition of little fairness loss.
Keywords: communication technology noma user selection power allocation
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