实现代码LFM远程接收信号

 close all,clc,clear all

    
 z = 1.5;
    
 f1 = 2.5e3;
    
 f2 = 15e3;
    
 B1  = f2-f1;    % 带宽15-2.5=12.5KHz
    
 T  = 0.719e-3;  % 脉宽0.719ms
    
 k = 1.7e7;      % K=B/T
    
 Fs = 10*15e4;   % 采样率
    
 N = 1;          %控制窗口长度
    
 c = 1480;       %Speed of sound in water
    
 t = 0:1/Fs:N*T-1/Fs;
    
 z_temp = 0:z/length(t):z;
    
 A = 1;
    
 P0 = 1;
    
 w = 2*pi*5*f2;
    
 % K = B/T;S
    
 Beta = 1.2;     % Coefficient of non-linearity
    
 c = 1480;       % Speed of sound in water
    
 rho = 1.07;     % Density of medium
    
 alpha = 0.4;    % Absorption Co