A Self-interference Cancellation and Interference Alignment Algorithm for Full-duplex Relay Networks with Maximum Mutual Information and Low Complexity
XIE Xianzhong WANG Chuang LEI Weijia LAN Shunfu
(Institute of Personal Communications, Chongqing University of Posts and Telecommunications,Chongqing 400065, China)
This paper considers a multi-user full-duplex relay interference channel where self- interference and user interference exist. Firstly, a self-interference cancellation and interference alignment algorithm based on maximum global mutual information is proposed, and then the concrete algorithm and scheme of self-interference cancellation matrix is given. Furthermore, this paper investigates the feasibility conditions of the signal alignment and interference suppression, so as to analyze the mutual information, the interference plus noise power and the degree of freedom of the system. Theoretical analysis and simulation results show that the proposed algorithm can improve the mutual information and the degree of freedom of the system, and reduce the bit error rate compared with the existing typical full-duplex relay scheme. In addition, the relay only needs to do simple power constraints, and it is not necessary to do complex signal processing which reduces the complexity of signal processing for the whole system.
谢显中,王闯,雷维嘉,兰顺福. 互信息量最大化和低复杂度的全双工中继网络自干扰消除和干扰对齐算法[J]. 电子与信息学报, 2016, 38(5): 1186-1193.
XIE Xianzhong, WANG Chuang, LEI Weijia, LAN Shunfu. A Self-interference Cancellation and Interference Alignment Algorithm for Full-duplex Relay Networks with Maximum Mutual Information and Low Complexity. JEIT, 2016, 38(5): 1186-1193.
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