D2D辅助的协作中继NOMA系统中TSRS策略及其中断性能分析 |
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引用本文: | 吴舒婷,贺玉成,张良梅,周林.D2D辅助的协作中继NOMA系统中TSRS策略及其中断性能分析[J].信号处理,2022,38(5):1001-1008. |
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作者姓名: | 吴舒婷 贺玉成 张良梅 周林 |
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作者单位: | 华侨大学厦门市移动多媒体通信重点实验室,福建 厦门 361021 |
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基金项目: | 福建省自然科学基金2018J01096 |
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摘 要: | 该文研究了D2D辅助的协作中继NOMA(DC-NOMA)网络,在中继用户(RU)转发信息的第二时隙,利用RU到蜂窝中心用户(CCU)的D2D通信链路传输新的信号。为了提高传输可靠性,设计了新的信号检测策略,通过完全利用边缘信息消除了用户间的干扰。基于新的信号检测策略,提出了一种两阶段中继选择策略(TSRS)。在满足蜂窝边缘用户(CEU)可靠接收的中继集合中,选择使CCU成功解码概率最大的中继。为了评估所提出的DC-NOMA方案,推导了每个用户的确切中断概率且通过仿真得到验证。仿真结果表明,在高信噪比区域,该文所提出的基于新的信号检测策略的DC-NOMA在TSRS方案下的中断性能优于部分中继选择方案(PRSS)和传统的DC-NOMA。特别地,增大中继数量可有效提高DC-NOMA系统的中断性能。
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关 键 词: | ??:??非正交多址接入 D2D通信 中继选择 中断概率 |
收稿时间: | 2021-08-26 |
TSRS Strategy and Outage Performance Analysis of D2D Aided Cooperative Relaying NOMA System |
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Affiliation: | Xiamen Key Laboratory of Mobile Multimedia Communications,Huaqiao University,Xiamen,Fujian 361021,China |
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Abstract: | ? ?In this paper, a D2D aided cooperative relaying system using non-orthogonal multiple access (DC-NOMA) is investigated, D2D communication link from relaying user (RU) to cell-center user (CCU) is exploited to transmit a new signal during the information forwarding of RU in the second phase. To improve the transmission reliability, a novel signal detection strategy is designed, which the side information is fully utilized to eliminate the inter-user interference. Based on the novel signal detection strategy, a two-stage relay selection strategy (TSRS) is proposed. In the subset of relays that satisfy cell-edge user (CEU) reliable reception, the relay with the greatest the successful decoding probability of CCU is selected. To evaluate the proposed DC-NOMA scheme, exact outage probabilities are derived for each user and verified by computer simulations. Simulation results demonstrate the outage performance of the proposed DC-NOMA using the TSRS based on the novel signal detection strategy outperforms that a partial relay selection scheme (PRSS) and the conventional DC-NOMA in the high signal-to-noise region. In particular, the increase in the number of relays can effectively improve the outage performance of the proposed system. |
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