www.pudn.com > programradarsystemdisign.zip > Fig4_6.m

% Use this program to reproduce Fig. 4.6 of text 
close all 
clear all 
taup = 1; 
b =20.; 
up_down = 1.; 
taux = -1.5*taup:.01:1.5*taup; 
fd = 0.; 
mu = up_down * b / 2. / taup; 
ii = 0.; 
for tau = -1.5*taup:.01:1.5*taup 
   ii = ii + 1; 
   val1 = 1. - abs(tau) / taup; 
   val2 = pi * taup * (1.0 - abs(tau) / taup); 
   val3 = (fd + mu * tau); 
   val = val2 * val3; 
   x(ii) = abs( val1 * (sin(val+eps)/(val+eps))); 
end 
figure(1) 
plot(taux,x) 
grid 
xlabel ('Delay - seconds') 
ylabel ('Uncertainty') 
figure(2) 
plot(taux,x.^2) 
grid 
xlabel ('Delay - seconds') 
ylabel ('Ambiguity')