基于部分信道信息的中继选择算法  

Partial Channel Information Based Relay Selection Algorithm

作　　者：吴素文[1] 赵明[1] 朱近康[1] 韩凌娟[1] 

机构地区：[1]中国科学技术大学个人通信与扩频实验室,合肥230027

出　　处：《数据采集与处理》2011年第2期172-176,共5页Journal of Data Acquisition and Processing

基　　金：国家自然科学基金(60572766)资助项目;国际科学技术合作(2008DFA12160)资助项目

摘　　要：提出了一种在放大转发协作网络中,基于部分信道信息的中继选择算法。与前人研究基于两跳瞬时信道信息的中继选择算法不同,所提的中继选择算法基于第1跳的瞬时信道信息和第2跳的统计信道信息,选择第1跳的瞬时信噪比和第2跳的统计平均信噪比乘积最大的中继节点。推导了该中继选择算法的中断概率,给出了中断概率的闭式表达。结合推导过程,进一步给出一种在已知第1跳信道信息条件下最小化系统后验中断概率的增强型选择算法。仿真结果验证了理论推导的正确性,同时表明所提算法的性能优于其他算法。The relay selection algorithm in amplify-and-forward（AF） cooperative networks is presented.Different from the previous work where the relay selection is based on the instantaneous channel state information（CSI） of two hops,the proposed relay selection algorithm is based on the instantaneous CSI of the first hop and the statistical CSI of the second one.It selects the relay with the largest multiplication of the instantaneous SNR of the first hop and the average SNR of the second hop.Then,the outage probability of the proposed relay selection algorithm is derived.Moreover,an enhanced selection algorithm is proposed.The algorithm selects the relay whose anticipant outage probability is the lowest with the priori information of the instantaneous CSI of the first hop.The simulation results confirm the analytical results of the proposed algorithm and verify that the performance of the proposed algorithm is better than those of other algorithms.

关 键 词：协作网络 中继选择 放大转发 部分信道信息 中断概率 

分 类 号：TN925[电子电信—通信与信息系统]