采用最优放大因子的全双工中继选择方案  

Full-Duplex Relay Selection Scheme Applying the Optimal Amplify Factor

作　　者：吴晓龙[1] 赵睿[1] 周林[1] 简贵胄[2] 

机构地区：[1]华侨大学信息科学与工程学院,福建厦门361021 [2]北京微电子技术研究所,北京市100076

出　　处：《信号处理》2014年第5期583-590,共8页Journal of Signal Processing

基　　金：国家自然科学基金(61271383;61201264;61302095);中央高校基本科研业务费专项资金资助(JB-ZR1205);福建省科技创新平台建设项目(2012H2002);泉州市科技计划项目(2013Z36)

摘　　要：在多中继协作通信系统中,提出一种基于放大转发协议的全双工中继选择算法并进行了相应的理论分析。由于全双工中继中自干扰的存在,为保证通信的质量,首先利用传统的最大化边界信干噪比算法选择一个中继,然后利用中继的最优功率放大因子来减小自干扰对系统的不利影响。采用最优放大因子的全双工中继选择方案虽然在复杂度和选择时延上都有一定增加,但是在系统中断概率、中继节点功率消耗、目的节点接收信干噪比方面都优于采用最大化边界信干噪比的系统。最后,我们利用蒙特卡洛仿真结果验证了该选择算法的优势。We propose a full-duplex relay selection algorithm based on amplify-and-forward protocol and conduct the the- oretical analysis in the cooperative communication system with multiple relays. Because of the existence of the loop interfer- ence in duplex relay, to guarantee the quality of communications, we select a relay based on maximizing the margin signal to interference and noise ratio first, and then alleviate the impact of loop interference on the system by using the optimal amplify factor of relay. Although the relay selection algorithm applying the optimal amplify factor has a slightly increase in complexity and selecting delay, but this it can provide a better performance than the traditional algorithm maximizing the margin signal to interference and noise ratio in terms of outage probability, power consumption of relay, and received signal to interference and noise ratio at the destination. Finally, we demonstrate the advantages of the proposed algorithm with Monte Carlo simulations.

关 键 词：全双工中继 中继选择 自干扰 系统中断概率 接收信干噪比 

分 类 号：TN929.5[电子电信—通信与信息系统]