两种典型中继处理策略环境下天线选择性能比较  

Performance comparison of antenna selection under two different typical relay strategies

作　　者：黄晓晖[1] 束锋[1,2,3] 刘婷婷[1,4] 胡锦松[1] 陆锦辉[1] HUANG Xiaohui;SHU Feng;LIU Tingting;HU Jinsong;LU Jinhui(College of Electronic Engineering and Optical Technology,Nanjing University of Science and Technology,Nanjing Jiangsu 210094,China;National Mobile Communications Research Laboratory,Southeast University, Nanjing Jiangsu 210096,China;Key Laboratory of Radio Environment and Modular Technology,China Research Institute of Radio Wave Propagation, Qingdao Shandong 266107,China;College of Communication Engineering,Nanjing Institute of Technology, Nanjing Jiangsu 211167, China)

机构地区：[1]南京理工大学电子工程与光电技术学院,江苏南京210094 [2]东南大学移动通信国家重点实验室,江苏南京210096 [3]中国电波传播研究所电波环境及模化技术重点实验室,山东青岛266107 [4]南京工程学院通信工程学院,江苏南京211167

出　　处：《太赫兹科学与电子信息学报》2017年第2期211-214,共4页Journal of Terahertz Science and Electronic Information Technology

摘　　要：考虑到天线选择(AS)具有实现简单和性能好等优点,通过仿真评估在不同中继策略场景下天线选择的性能。评估方法如下:中继站第1时隙采用最大比合并算法(MRC),第2时隙选择中继处理后具有最大信道增益的单天线进行信号传输。仿真结果表明:与现有的分布式空时码(DSTBC)和最大比合并、最大比合并和匹配滤波(MF)算法相比,最大比合并加天线选择混合方案在转发重传(AF)和译码重传(DF)策略下都能够提供更优的合速率与误码性能;并且在中继站采用译码转发策略时,该方案表现出优于采用放大转发策略的情形。例如,当误码率(SER)等于10-3时,译码转发策略具有1 d B的信噪比(SNR)增益。Antenna Selection(AS)has the advantages of simple implementation and good performance.The performance of AS in the relay networks with Amplify-and-Forward(AF)and Decode-and-Forward(DF)strategies is evaluated.The evaluation method is as following:the first time slot of the relay station adopts the Maximum Ratio Combining(MRC)algorithm and the second time slot selects the optimal channel which has the maximum channel gain for signal transmission.Simulation results show that the MRC plus AS can provide better information rate and Signal Noise Ratio(SNR)performance compared to the Distributed Space-Time Block Coding(DSTBC)plus Maximum Ratio Combining(MRC)or MRC plus MF.When Symbol Error Rate(SER)=10-3,the scheme in the DF based relay network achieves a1dB SNR gain over the scheme in the AF based network.

关 键 词：天线选择 最大比合并 信道增益 放大转发 译码转发 

分 类 号：TN92[电子电信—通信与信息系统]