一种中继辅助下SISO系统的干扰对齐算法  

Interference alignment algorithm for single relay SISO system based on chordal distance

作　　者：施赵媛[1] 雷维嘉[1] 谢显中[1] 

机构地区：[1]重庆邮电大学个人通信研究所,重庆400065

出　　处：《重庆邮电大学学报（自然科学版）》2012年第4期411-415,共5页Journal of Chongqing University of Posts and Telecommunications(Natural Science Edition)

基　　金：重庆市自然科学基金(CSTC;2010BB2415);重庆市自然科学基金(cstc2011jjA40006);重庆邮电大学博士启动基金(A2011-03)~~

摘　　要：通过研究含中继的单输入单输出(single input single output,SISO)对称无线干扰网络,分析了在SISO对称网络中进行干扰对齐(interference alignment,IA)时使用中继的必要性。综合考虑所有用户的最大弦距离给出了优化的分布式干扰对齐算法。基于此优化算法并使用中继,只需要进行2个时隙的信道扩展就可对SISO干扰网络实现干扰对齐,使每个用户对达到1/2的自由度。仿真结果表明,在增加中继并应用优化算法后,系统的容量、能量效率都有了显著的改善。In this paper, we introduce a relay to the SISO symmetric wireless interference network, and apply interference alignment technology to this network. By comprehensively considering all the users＇ performances, we propose an optimized distributed interference alignment algorithm based on the biggest chordal distance criterion. Applying the optimization algo- rithm, we can realize interference alignment only requiring two time slots extension for the three users SISO interference net- work, and achieve 1/2 Degree of freedom for each user. Simulation results justify that using relay and optimization algo- rithm can significantly improve the capacity and energy efficiency of the system.

关 键 词：干扰对齐 弦距离 中继 预编码 干扰压缩 单输入单输出(SISO) 

分 类 号：TN929.53[电子电信—通信与信息系统]