说明：  这是采用esprit算法、music算法和MINnorm算法实现目标一维角度测量。输入为多接收阵元接收的回波信号，仅是伪代码，便于理解原理。
(This is to use ESPRIT algorithm, music algorithm and minnorm algorithm to achieve one-dimensional angle measurement. The input is the echo signal received by multiple receiving elements, which is only pseudo code, so it is easy to understand the principle.)