利用最小二乘法进行拟合多元非线性方程，线性调频脉冲压缩的Matlab程序,这是第二能量熵的matlab代码。- Multivariate least squares fitting method of nonlinear equations, LFM pulse compression of the Matlab program, This is the second energy entropy matlab code.

This is the second energy entropy matlab code, Using common plane wave expansion method, FIG simulation speed, distance, amplitude three-dimensional image.