中文说明：
分析雷达信号方向基于四阶累积量的MUSIC算法可以实现阵列扩展，提高了DOA估计精度、分辨率,降低阵列信号处理对信噪比的要求。
English Description：
Analyzing the direction of radar signal, music algorithm based on fourth-order cumulant can realize array expansion, improve the accuracy and resolution of DOA estimation, and reduce the requirement of signal-to-noise ratio in array signal processing