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首页> 外文期刊>Wireless Communications Letters, IEEE >User Selection and Power Allocation for Downlink NOMA Systems With Quality-Based Feedback in Rayleigh Fading Channels
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User Selection and Power Allocation for Downlink NOMA Systems With Quality-Based Feedback in Rayleigh Fading Channels

机译:用于下行链路NOMM系统的用户选择和功率分配,在瑞利渐亮通道中的质量基于反馈

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In this letter, we consider a single-cell downlink non-orthogonal multiple access (NOMA) system using greedy scheduling with quality-based channel-state information (CSI) feedback (QCF), and propose the user selection and power allocation scheme to reduce the physical-layer latency and achieve target data rates while maximizing the sum rate at high signal-to-noise power ratio (SNR). Assuming Rayleigh fading channels, we investigate the transmission time interval index, which quantifies physical-layer latency, the overhead index of CSI feedback, and the average data rate of the proposed scheme. In addition, we show that the sum rates of NOMA and orthogonal multiple access systems using greedy scheduling with QCF are equal at high SNR.
机译:在这封信中,我们考虑使用具有基于质量的信道状态信息(CSI)反馈(QCF)的贪婪调度的单个小区下行链路非正交多址(NOMA)系统,并提出用户选择和功率分配方案来减少物理层延迟和实现目标数据速率,同时以高信噪比功率比(SNR)最大化的总和速率。假设瑞利衰落频道,我们调查传输时间间隔索引,这些索引量化物理层延迟,CSI反馈的开销指数以及所提出的方案的平均数据速率。此外,我们表明,使用QCF使用贪婪调度的NOMA和正交多次访问系统的总和率在高SNR时等于。

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