Interference cancellation method based on space-time code for MIMO interference channel  

作　　者：Yang Dong Tian Xinji 

机构地区：[1]Opening Project of Key Laboratory of Mine Informatization,Henan Polytechnic University [2]School of Computer Science and Technology, Henan Polytechnic University

出　　处：《The Journal of China Universities of Posts and Telecommunications》2016年第3期45-50,共6页中国邮电高校学报（英文版）

基　　金：supported by Opening Foundation of Opening Project of Mine Informatization of Henan (KY2015-01);the Fundamental Research Funds for the Universities of Henan Province (NSFRF140126)

摘　　要：We investigate how to cancel interference by using space time code and codeword space alignment for multiple-input multiple-output （MIMO） Y channel consisting of three users and a relay. All the nodes adopt Alamouti code. During the multiple access （MA） stage, two codewords within each reciprocal codeword pair are aligned through pre-coding. The relay decodes the elements of each codeword pair using the orthogonal property of effective channel matrix of Alamouti codeword. During the broadcast （BC） stage, the interference between codeword pairs at each user is eliminated by the orthogonal property of effective channel matrix of Alamouti codeword, instead of the interference alignment （IA） pre-coding. Thus, channel state information （CSI） is not required during the BC stage, which greatly reduce the amount of feedback.We investigate how to cancel interference by using space time code and codeword space alignment for multiple-input multiple-output （MIMO） Y channel consisting of three users and a relay. All the nodes adopt Alamouti code. During the multiple access （MA） stage, two codewords within each reciprocal codeword pair are aligned through pre-coding. The relay decodes the elements of each codeword pair using the orthogonal property of effective channel matrix of Alamouti codeword. During the broadcast （BC） stage, the interference between codeword pairs at each user is eliminated by the orthogonal property of effective channel matrix of Alamouti codeword, instead of the interference alignment （IA） pre-coding. Thus, channel state information （CSI） is not required during the BC stage, which greatly reduce the amount of feedback.

关 键 词：MIMO Y channel space-time code space alignment feedback amount 

分 类 号：TN919.3[电子电信—通信与信息系统]