可重构智能表面辅助的联合空间和码索引调制通信系统  

Reconfigurable Intelligent Surface-Aided Joint Spatial and Code Index Modulation Communication System

作　　者：陈平平 张云馨 杜伟庆[2] CHEN Pingping;ZHANG Yunxin;DU Weiqing(School of Advanced Manufacturing,Fuzhou University,Quanzhou 362251,China;College of Physics and Information Engineering,Fuzhou University,Fuzhou 350108,China)

机构地区：[1]福州大学先进制造学院,泉州362251 [2]福州大学物理与信息工程学院,福州350108

出　　处：《电子与信息学报》2025年第2期439-448,共10页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(62171135)。

摘　　要：传统的可重构智能表面辅助的空间调制(RIS-SM)通信系统利用接收天线的索引来传输额外的信息比特,因此该系统数据传输速率的提升是以增加接收机天线数为代价。为了提高RIS-SM系统的数据传输速率和能量效率,该文提出可重构智能表面辅助的联合空间和码索引调制(RIS-JSCIM)通信系统。该系统利用多元正交幅度调制(M-QAM)符号、空域的接收天线索引和码索引传输信息比特。天线索引和码索引传输的信息比特不需要消耗能量,因此RIS-JSCIM系统能够获得良好的能量效率。该文对比了RIS-JSCIM系统和其他系统的能量效率、系统复杂度和误码率性能。对比结果表明,所提RIS-JSCIM系统以增加一定复杂度为代价,能够获得相比于其他系统更优异的能量效率和误码率性能。Objective The rapid growth of wireless communication traffic is pushing existing networks toward greener,more energy-efficient solutions.Therefore,research into wireless communication systems that balance low complexity with high energy efficiency is of significant importance.Index Modulation(IM)technology,which offers advantages in low complexity and high energy efficiency,has emerged as a promising candidate for future systems.Reconfigurable Intelligent Surfaces(RIS)provide benefits such as reconfigurability,simple hardware,and low energy consumption,presenting new opportunities for wireless communication development.However,traditional RIS-aided Spatial Modulation(RIS-SM)and RIS-aided Code Index Modulation(RIS-CIM)systems use the index of the receiver antenna or code to transmit additional information bits.Therefore,the data transmission rates of RIS-SM systems improve at the cost of increasing the number of receiver antennas.To enhance the data transmission rates and energy efficiency of RIS-SM systems,this paper proposes a RIS-Aided Joint Spatial and Code Index Modulation(RIS-JSCIM)communication system.Methods The proposed system utilizes M-ary Quadrature Amplitude Modulation(M-QAM)symbols,spatial antenna index,and code index to transmit information bits.The information bits transmitted through the antenna and code indices of RIS-JSCIM do not consume energy,enabling RIS-JSCIM to achieve high energy efficiency.At the receiver,both Maximum Likelihood Detection(MLD)and low-complexity Greedy Detection(GD)algorithms are employed.The MLD algorithm,although high in complexity,provides excellent Bit Error Rate(BER)performance,while the GD algorithm offers a better trade-off between complexity and BER performance.Furthermore,this paper analyzes the energy efficiency and complexity of the proposed RIS-JSCIM system and uses Monte Carlo simulations to evaluate its BER performance.The performance metrics of the RIS-JSCIM system are also compared with those of other systems.The results show that,despite a slight increase

关 键 词：可重构智能表面 码索引调制 空间调制 扩频 多元正交振幅调制 

分 类 号：TN914.4[电子电信—通信与信息系统]