时间反转直扩通信系统及性能分析  

Time-Reversal DSSS Communication Systems and Performance Analysis

作　　者：雷维嘉[1,2] 邹梦婷 雷宏江[1,2] 唐宏[1,2] LEI Wei-jia;ZOU Meng-ting;LEI Hong-jiang;TANG Hong(School of Communication and Information Engineering,Chongqing University of Posts and Telecommunications,Chongqing 400065,China;Chongqing Key Laboratory of Mobile Communications Technology,Chongqing University of Posts and Telecommunications,Chongqing 400065,China)

机构地区：[1]重庆邮电大学通信与信息工程学院,重庆400065 [2]重庆邮电大学移动通信技术重庆市重点实验室,重庆400065

出　　处：《电子学报》2024年第1期69-80,共12页Acta Electronica Sinica

基　　金：国家自然科学基金(No.61971080)。

摘　　要：时间反转传输技术的空时聚焦特性能够有效地提升通信系统的性能.本文设计了一种将时间反转技术应用于直扩通信系统的方案,并对多径衰落信道下单用户和多用户系统的接收信干噪比、系统容量、误比特率等性能进行了理论分析与仿真验证.理论与仿真结果表明,通过时间反转预处理,直扩通信系统的性能得到了改善,且优于复杂度较高的多通道Rake接收的系统,且多径数目越多,优势越明显.The space-time focusing characteristics of the time-reversal transmission technology can effectively im-prove the performance of the communication system.This paper designs a scheme that applies the time-reversal technology to the direct-spread-spread-spectrum(DSSS)communication system.The performance of the system,such as receiving sig-nal-to-interference-noise ratio,system capacity,and bit error rate,is analyzed theoretically and verified by simulation.The-oretical and simulation results show that the performance of the DSSS communication system has been significantly im-proved through time-reversal preprocessing,and it is better than the system using multi-channel Rake receiver with high complexity,and the more the number of multi-paths,the more obvious the advantage.

关 键 词：直接序列扩频 时间反转 RAKE接收机 系统容量 误比特率 

分 类 号：TN918[电子电信—通信与信息系统]