作　　者： ; ; ;

机构地区： 河南科技大学

出　　处： 《电视技术》 2015年第22期104-107,共4页

摘　　要： 对于单源多中继放大转发(Amplify and forward,AF)协作网络,传统中继选择方法存在难以在性能和复杂度之间取得折中的问题。结合最佳调和平均和SR门限算法,提出了一种基于AHMT(Approximate Harmonic Mean with Threshold,AHMT)中继选择算法。该算法首先在中继节点处设置信噪比门限值,然后将源S到中继R链路的瞬时信噪比大于门限值的中继作为待选中继。最后在待选中继集合中通过最佳部分信道AHMT算法选出最佳中继。仿真结果表明:与传统算法相比,所提算法不仅降低了系统的复杂度,而且性能更优,在高信噪比和中继个数较多时均可逼近传统最佳调和平均算法。 According to monophyletic relay amplify and forward collaborative network, because of the traditional relay selection method is difficult to achieve the compromise between performance and complexity. Combining with the best harmonic mean and SR threshold algorithm, and based on approximate harmonic mean with threshold relay selection algorithm are proposed. Firstly, algorithm introduced SNR threshold on relays. Then the source-relay link instantaneous SNR more than threshoht method of relay nodes as candidate relay , and last in the candidate set of relay choose the best relay by the best part of AHMT algorithm. The simulation results show that compared with the traditional relay selection algorithm, the proposed algorithm not only reduces the complexity of the system and but also has beuer performance. And in high SNR and relay number is large close to harmonic average algorithm.

关 键 词： 中继选择 放大转发 协作网络 复杂度

领　　域： [电子电信] [电子电信]