3用户MIMO干扰信道中稳健的机会干扰对齐方法

摘要

With the insights from conventional interference alignment (IA),a user selection criterion is formulated not only to reduce the chordal distance between interference spaces,but also to enlarge that between the signal-interference spaces.Besides,at the receiver side,the post-processing matrix will be selected smartly to maximize channel capacity.With all have been mentioned,a robust opportunistic interference alignment (ROIA) method in 3 user MIMO interference channels (IC) is proposed.Compared with the OIA method in [1],the proposed method promises not only robustness in instantaneous performance but also higher capacity.But the system complexity increases slightly.The effectiveness of the proposed method is verified by simulation results.%本文根据传统的干扰对齐思想,在缩小干扰空间之间弦距的同时尽量增大信号-干扰空间之间弦距,以此为目标设计用户选择准则,并在接收端采用预处理矩阵智能选取技术最大化信道容量,提出了3用户MIMO干扰信道中稳健的机会干扰对齐方法.相比文献[1]方法,所提出的方法不但具有更高的系统瞬时性能稳健性,而且还具有更高的信道容量,只是在复杂度方面略有增加.仿真结果证明了本文方法的有效性.