多天线通信系统抗干扰算法的比较研究

Anti-interference Algorithm Comparison Research of Multi-antenna Communication System

多天线可以提高通信系统容量和频谱效率,从而提升传输速率和改善通信质量。将自适应波束形成中的MVDR算法应用于多天线通信系统,对干扰信号进行抑制。与之对比,采用盲源分离中的Fast ICA算法对干扰信号和期望信号进行分离,同样达到了抗干扰的效果。通过仿真比较了阵列误差和信噪比对这两种算法抗干扰性能的影响。分析了性能差异的产生原因,在此基础上给出了两种算法的适用条件和应用建议。

Multiple antennas are used to increase the capacity and spectrum efficiency of communication system, thus can improve the transmission rate and the communication quality. This paper applies the MVDR adaptive beamforming algorithm, to suppress interference signals in multi-antenna communication system. Meanwhile, one of the blind source separation algorithms, FastICA algorithm, is used to separate the interference signals and desired signals, which also achieves the effect of anti-interference. Through simulations, the paper compares the impact of array error and signal to noise ratio on these two algorithms, and analyzes the cause of their different anti-interference performances. Based on the analysis, the applicable conditions and application advice on these two algorithms are given.