Spatial channel pairing-based maximum ratio combining algorithm for cooperative relay networks  

中继协作网络中基于空间信道配对的最大比合并算法（英文）

作　　者：胡锦松[1] 束锋[1,2,3,4] 许正文[3] 阙非 黄晓晖[1] 刘婷婷[1] 陆锦辉[1] 

机构地区：[1]南京理工大学电子工程与光电技术学院,南京210094 [2]东南大学移动通信国家重点实验室,南京210096 [3]中国电波传播研究所电波环境特性及模化技术国家重点实验室,青岛266107 [4]福建农林大学计算机与信息学院,福州350002

出　　处：《Journal of Southeast University(English Edition)》2016年第2期146-150,共5页东南大学学报（英文版）

基　　金：The Open Research Fund of National Mobile Communications Research Laboratory of Southeast University(No.2013D02);the Open Research Fund of National Key Laboratory of Electromagnetic Environment of China Research Institute of Radio Wave Propagation(No.201500013);the National Natural Science Foundation of China(No.61271230,61472190)

摘　　要：To improve the reliable performance of information transmission in cooperative relay networks, the scheme of the max-rate spatial channel pairing （SCP） based on maximum ratio combining （MRC） is proposed. The scheme includes three steps： channel phase cancellation, MRC, and SCP. Eventually, the solution of the scheme is modeled as convex optimization. The objective function of the optimization problem is to maximize the transmission rate and the optimization variable is the strategy of pairing between the uplink spatial sub-channels of each user and the corresponding downlink spatial ones. The theorem of the arrangement inequalities is adopted to obtain the approximate closed-form solution of the optimal pairing for this convex optimization. Simulation results demonstrate that compared to the existing distributed space-time block coding and coherent combined schemes without SCP, the proposed max-rate SCP plus MRC algorithm achieves appreciable improvements in symbol error rate in medium and high signal-to-noise ratio regimes. The achievable performance gain is due to the use of maxrate SCP.为了提高中继协作网络中信息传输的可靠性,提出了基于最大比合并的速率最大化空间信道配对的方案.该方案包括3个步骤:信道相位消除、最大比合并和空间信道配对.将该方案建模为凸优化问题,优化的目标函数是最大化传输速率,优化变量为每个用户上行链路的空间子信道与其相应的下行链路的空间子信道的配对策略.采用排序不等式定理推导并获得了该优化问题的最优空间信道配对解的近似闭合表达式.仿真结果表明,相比于已有的分布式空时分组码和相干合并的方法,所提出的基于空间信道配对的最大比合并算法的符号误码率性能在中、高信噪比区间获得了明显的提高,此性能的提高归功于所提方法充分利用了空间信道配对增益.

关 键 词：RELAY maximum ratio combining coherentcombining spatial channel pairing distributed space-timeblock coding 

分 类 号：TN929.53[电子电信—通信与信息系统]