非理想信道估计下的放大转发协同通信系统性能分析  

Performance analysis of amplify-and-forward cooperative communication systems with imperfect channel estimation

作　　者：王磊[1] 蔡跃明 杨炜伟[1] 屠佳[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《通信学报》2011年第6期116-123,共8页Journal on Communications

基　　金：国家自然科学基金资助项目(60972051;61001107);国家科技计划重大专项基金资助项目(2010ZX03006-002-04);江苏省自然科学基金资助项目(BK2010101)~~

摘　　要：针对两跳多中继放大转发协同通信系统,分析了信道估计误差对系统性能的影响。考虑机会中继和全参与中继两种中继策略,分别推导了系统误码率的闭式表达式,并分析了不同信道估计质量阶数下的系统分集增益。平均信噪比损失率分析表明机会中继较全参与中继对信道估计误差更为敏感。仿真结果验证了理论分析。The impact of channel estimation errors on the performance for two-hop multi-relays assisted amplify-and-forward （AF） cooperative communication systems was investigated. Closed-form expressions of the average symbol error rate, as well as the diversity gain under different channel estimation quality orders for both opportunistic relaying （OPR） and all-participate relaying （APR） schemes were derived. Average signal-to-noise-ratio （SNR） gap ratio is investigated for the two types of cooperative communication systems, which lead to a conclusion that the OPR scheme is more susceptible to channel estimation errors than the APR scheme. Numerical results verify the theoretical analysis.

关 键 词：信道估计误差 误码率 分集增益 信噪比损失率 

分 类 号：TN911.23[电子电信—通信与信息系统]