中文说明： 处理信号的时频分析，进行逐步线性回归，通过虚拟阵元进行DOA估计，有较好的参考价值，采用了小波去噪的思想，有CDF三角函数曲线/三维曲线图。
English Description：
Time-frequency analysis for signal processing, stepwise linear regression based on virtual array DOA estimates, has good references, uses the idea of wavelet denoising, CDF trigonometric curve/three-dimensional graph.