A Reflection Modulation System Based on Reflecting Element Grouping of Active Intelligent Reflecting Surface
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摘要: 为克服智能反射面(IRS)辅助通信系统的“双重路径损耗”,进一步提升系统的可靠性和频谱效率,该文提出一种基于有源IRS反射单元分组的反射调制(RM)系统方案,利用有源反射单元分组的数量来传输额外信息。然后基于矩母函数推导了最大似然检测算法下基站发射符号与有源反射单元分组数量的平均成对错误概率,获取到系统的理论比特错误概率(BEP)上界以及可达速率。仿真结果验证了理论推导的准确性,同时表明所提方案具有更优的误码性能和频谱效率。Abstract: To overcome the “double path loss” in Intelligent Reflecting Surface (IRS) assisted communication system and further enhance the reliability and spectral efficiency, a Reflection Modulation (RM) system scheme based on grouping of active IRS reflecting elements is proposed. This scheme utilizes the number of active reflecting element groups to transmit additional information. Then the average pairwise error probability of both the symbols transmitted by base station and the number of active reflecting element groups under the maximum likelihood detection algorithm is derived based on the moment generating function, and an upper bound on the theoretical Bit Error Probability (BEP) as well as the achievable data rate of the system are obtained. Simulation results verify the accuracy of the theoretical derivation and demonstrate the superior error performance and spectral efficiency of the proposed scheme.
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表 1 $ N = 6 $, $ L = 3 $时基于RE分组的RM比特映射关系
IRS传输的信息位 00 01 10 11 有源分组数量$ l $ 0 1 2 3 IRS反射状态 -
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