无源空时分组码  

作　　者：栾慧煦 贺晨 

机构地区：[1]西北大学信息科学与技术学院,西安710127

出　　处：《科技创新与应用》2023年第12期1-10,共10页Technology Innovation and Application

基　　金：国家自然科学基金面上项目(62271392)。

摘　　要：不同于传统通信,无源通信是一种三端结构,由查询端、标签端和接收端构成。从天线结构的角度而言,无源通信可以归纳为双基地与单基地2种结构。在双基地结构中,读写器使用2组不同的天线进行信号发射和接收,而在单基地结构中,读写器使用同一组天线进行信号发射和接收。多输入多输出技术由于其在传统通信中优良的性能表现被引入到无源通信,其中空时分组码作为一种能够有效提升系统可靠性的多输入多输出技术受到学术界的关注。然而,由于无源通信信道结构与传统通信信道结构有着根本的不同,传统信道中的空时分组码设计准则并不能够完美适用于无源信道,这为无源空时分组码的研究带来挑战。该文对关于无源空时分组码近几年的研究进行总结,对总结的无源空时分组码与经典的Alamouti code在多种信道配置下进行性能比较,为未来无源空时分组码的设计与研究提供参考依据。Different from the traditional communication,passive communication is a three-terminal structure,which consists of the query end,the tag end,and the receiving end.From the perspective of antenna configuration,passive communication can be summarized into two configurations:bistatic configuration and monostatic configuration.In bistatic configuration,the reader employs two different sets of antennas for signal transmission and reception,while in monostatic configuration,the reader employs the same set of antennas for signal transmission and reception.Multi-input multi-output(MIMO)technology has been introduced into passive communication due to its excellent performance in conventional communication,and space-time block code(STBC)has increasingly attracted academic attention as a MIMO technology that can effectively improve the reliability of the system.However,due to the fundamental difference between the passive channel structure and the conventional channel structure,the design criteria of the STBC in the conventional channel cannot be perfectly applied to the passive channel,which brings challenges to the research of passive STBC.This paper summarizes the research on passive STBC in recent years,and compares the performance of the summarized passive STBC with the classical Alamouti Code in multiple channel configurations,so as to provide a reference for future research on the design of passive STBC.

关 键 词：无源通信 多输入多输出 空时分组码 标签电路 占空比 

分 类 号：TN926[电子电信—通信与信息系统]