太赫兹科学与电子信息学报, 2017, 15 (2): 211, 网络出版: 2017-06-06
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
天线选择 最大比合并 信道增益 放大转发 译码转发 Antenna Selection Maximum Ratio Combining channel gain Amplify -and-Forward Decode-and-Forward
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 dB的信噪比 (SNR)增益。
Abstract
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 a 1 dB SNR gain over the scheme in the AF based network.
黄晓晖, 束锋, 刘婷婷, 胡锦松, 陆锦辉. 两种典型中继处理策略环境下天线选择性能比较[J]. 太赫兹科学与电子信息学报, 2017, 15(2): 211. HUANG Xiaohui, SHU Feng, LIU Tingting, HU Jinsong, LU Jinhui. Performance comparison of antenna selection under two different typical relay strategies[J]. Journal of terahertz science and electronic information technology, 2017, 15(2): 211.