RIS辅助的多层增广空域图案索引调制方案  

Multi-Layer augmented spatial pattern index modulation assised by RIS

作　　者：刘超文 任彦磊 边嘉慧 王明哲 余飞 刘伯阳 LIU Chaowen;REN Yanlei;BIAN Jiahui;WANG Mingzhe;YU Fei;LIU Boyang(School of Communications and Information Engineering,Xi’an University of Posts and Telecommunications,Xi’an 710121,China;Shaanxi Key Laboratory of Information Communication Network and Security,Xi’an 710121,China)

机构地区：[1]西安邮电大学通信与信息工程学院,陕西西安710121 [2]陕西省信息通信网络及安全重点实验室,陕西西安710121

出　　处：《西安邮电大学学报》2024年第2期38-52,共15页Journal of Xi’an University of Posts and Telecommunications

基　　金：国家自然科学基金项目(61901366);陕西省重点研发计划项目(2023-YBGY-272);陕西省教育厅专项科研计划项目(20JK0919)。

摘　　要：面向未来网络信息高效、可靠传输的实现要求,提出了一种可重构智能表面(Reconfigurable Intelligent Surface,RIS)赋能的多层增广空域图案索引调制(Augmented Pattern Index Modulation,APIM)方案。该方案利用收发空域图案索引与RIS反射空域图案索引分别承载传输信息,以实现多路数据的高效并行传输。利用面向RIS阵元和子集相位对齐的反射策略,以最大化目的接收天线信号功率,同时满足实现不同复杂度要求。在接收信号检测方面,分别引入了最优联合检测与次优分离检测两种算法,以达成检测性能与复杂度之间均衡的设计要求。构建基于同变量矩生成函数分析的多层RIS-APIM系统误码与容量性能分析统一框架,以评估所提多层RIS-APIM系统的可达性能。仿真结果表明,与单层RIS-APIM系统相比,所提多层RIS-APIM系统成倍地提升了数据传输速率。与经典APIM方案相比,所提方案的系统误码率较低,信息传输的有效性较高。To meet the requirements of efficient and reliable transmission of network information in future-oriented networks,a multi-layer augmented spatial pattern index modulation(APIM)empowered by reconfigurable intelligent surface(RIS)is proposed.The system utilizes the transceiver spatial pattern index and RIS reflecting spatial patterns index to carry transmission information separately to achieve efficient parallel transmission of multiple data.A reflection strategy based on RIS elements phase alignment and subset phase alignment is utilized to maximize the destination receive antenna signal power while satisfying different implementation complexity requirements.In terms of the received signal detection,two algorithms,the optimal joint detection and the suboptimal detached detection,are introduced respectively to achieve different trade-offs between detection performance and complexity.A unified framework for bits error rate(BER)and capacity performance analysis of the multi-layer RIS-APIM system,which is based on the analysis of homogeneous moment generating function,is constructed to evaluate the achievable performance of the proposed multilayer RIS-APIM system.Simulation results show that the proposed multi-layer RIS-APIM system exponentially improves the data transmission rate compared with the single-layer RIS-APIM system.In addition,compared with the classical APIM scheme,the proposed scheme has a lower system error rate and higher effectiveness in information transmission.

关 键 词：可重构智能表面 空域图案索引调制 反射策略 接收信号检测 可达性能分析 

分 类 号：TN929.5[电子电信—通信与信息系统]