模糊函数仿真.zip

% 简单脉冲信号的模糊函数 clc close all; clear all; T = 1; t = -T:5e-2:T; fd = -10*T:2e-1:10*T; fd = fd + eps; [xx,yy] = meshgrid(t,fd); AF = abs((sin(pi*yy.*(T-abs(xx))))./(T*pi*yy)); figure(1) mesh(xx,yy,AF); title('脉宽为T，具有单位能量简单脉冲的模糊函数'); xlabel('时延'); ylabel('多普勒频移'); zlabel('模糊函数AF'); figure(2) v = [10^(-0.5/20),10^(-3/20),10^(-10/20),10^(-20/20)];%%%%%%%% contour(xx,yy,AF,v); text(0.5,-8,{'-0.5,-3,-10和','-20dB等高线图'},'Edgecolor',[0 0 0]);%%%%%% title('简单脉冲模糊函数的等高线图'); xlabel('时延'); ylabel('多普勒频移'); t = -T:1e-6:T; At = 1-abs(t); figure(3) plot(t,At); title('简单脉冲AF的零多普勒截线'); xlabel('时延'); ylabel('幅值'); fd = -10*T:1e-2:10*T; fd = fd + eps; Af = abs((sin(pi*fd*T))./(T*pi*fd)); figure(4) plot(fd,Af); title('零延迟截线'); xlabel('多普勒频移'); ylabel('幅值'); % t = -T:1e-6:T; figure(5) fd = 0.31; Atf = abs((sin(pi*fd*(T-abs(t))))./(T*pi*fd)); plot(t,Atf,'r') hold on fd = 1.72; Atf = abs((sin(pi*fd*(T-abs(t))))./(T*pi*fd)); plot(t,Atf,'g') hold on fd = 7.5; Atf = abs((sin(pi*fd*(T-abs(t))))./(T*pi*fd)); plot(t,Atf,'b') title('时延剖面叠加'); xlabel('时延'); ylabel('幅值');