干扰对齐技术研究综述

Research on Interference Alignment Technique

随着用户数的增大,干扰制约着无线通信网络的容量。在资源有限的情况下,干扰对齐的提出为系统容量的提高提供了新的方法,成为当前降低通信系统干扰的研究热点。对齐主要指使接收端多个干扰信号重叠或抵消,压缩干扰所占资源。本文首先重点分析了基于信号空间、信道时隙、和信号编码级等典型的干扰对齐算法及其优缺点。然后根据这些算法在实际应用中的限制,给出反馈、中继、分组和接纳控制等改进机制;最后介绍了干扰对齐算法衡量的主要性能指标自由度,并分析比较了现有干扰对齐算法及改进机制的性能。

Nowadays,the capacity of the network seriously suffers from the interference with the users increasing. To deal with this problem,the interference alignment is provided to improve the system capability,though the wireless resource is limited. The basic idea of it is to structural multiple interference overlapped at the receiver and compression occupied resource of interference. In this paper,several related topics are discussed,e. g.,signal space alignment,channel time slot alignment and signal scale alignment. The corresponding enhanced methods are sequently introduced such as feedback,relay,partition and admission. Finally,some measures are given to test the performances of the interference alignment. And the analysis results are also shown with the comparison among these methods.