信道估计误差对双向中继通信的影响  

Effect of Channel Estimation Error on Two-way Relay Communications

作　　者：赵睿[1] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021

出　　处：《通信技术》2011年第10期33-35,共3页Communications Technology

基　　金：国家科技重大专项(No.2009ZX03003-004);国家自然科学基金(批准号:6090201260772164);福建省科技重大专项(No.2009HZ0008);福建省自然科学基金(No.2011J05152);华侨大学科研项目(No.10BS208)

摘　　要：在基于中继的双向无线通信系统中,分析了两时隙、三时隙和四时隙的中继传输模式的系统和速率性能。考虑到实际通信场景中,信道估计误差的存在使得两时隙和三时隙传输系统的自干扰无法完全消除,研究了信道估计误差对系统和速率性能的影响。仿真结果表明,在公平的发送总功率和信息交换的前提下,两时隙和三时隙传输的和速率在无信道估计误差时在任何信噪比情况下均优于四时隙传输,随着信道估计误差的增加,其和速率显著下降。In relay based two-way wireless communication systems,the performance of system sum rates of two time-slot,three time-slot and four time-slot transmission modes is analyzed.Considering the practical communication scenarios,the existence of channel estimation error would result in that the self-interferences of two and three time-slot transmission systems could not be totally eliminated,so the effect of channel estimation error on the system sum rate is investigated.Simulation results show that,on the premise of fair transmit sum power and information exchange,the sum rates of two and three time-slot transmissions are superior to that of four time-slot transmission at any signal-to-noise ratio values without channel estimation error,and the sum rates of two and three time-slot transmissions markedly drop with the increase of channel estimation error.

关 键 词：双向无线通信 中继传输 信道估计误差 和速率 

分 类 号：TN92[电子电信—通信与信息系统]