基于部分信道状态信息的双向中继系统性能分析  

Performance Analysis of Two-way Relay Systems Based on Partial Channel State Information

作　　者：赵睿[1] 郭荣新[1] 蔡灿辉[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：《山西大学学报（自然科学版）》2011年第4期606-611,共6页Journal of Shanxi University(Natural Science Edition)

基　　金：国家自然科学基金(60902012);福建省科技重大专项(2009HZ0008);福建省自然科学基金(2011J05152);华侨大学科研项目(10BS208)

摘　　要：在两信源均配置多天线的双向放大转发中继通信系统中,两个信源分别采用存在反馈延迟的部分信道状态信息(CSI)设计发射波束形成向量,分析了反馈延迟对系统性能产生的影响,在瑞利衰落信道下推导了系统中断概率和平均误符号率的解析表达式.仿真结果表明,天线数的增加会改善系统性能,但反馈延迟的增大会使系统性能恶化,且无反馈延迟时系统分集阶数大于存在反馈延迟时的分集阶数.数值仿真结果与解析曲线吻合验证了分析结论的正确性.In two-way amplify-and-forward relay communication systems with two multiple-antennas sources,two sources utilize partial channel state information(CSI) with feedback delay to design transmit beamforming vectors,respectively.The effect of feedback delay on system performance is investigated,and the analytical expressions of outage probability and average symbol error rate are derived over Rayleigh fading channels.The simulation results show that the increase of the number of antenna will improve the system performance,while the increase of feedback delay will degrades the system performance,and the diversity order of system without feedback delay is larger than that with feedback delay.The numerical simulations coincide with analytical results verifies the accuracy of the analysis conclusions.

关 键 词：双向放大转发中继 部分信道状态信息 反馈延迟 波束形成 误符号率 

分 类 号：N55[自然科学总论]