www.pudn.com > programradarsystemdisign.zip > fig2_10.m

% This program is used to reproduce Fig. 2.10 
%close all 
clear all 
pfa = 1e-9; 
nfa = log(2) / pfa; 
b = sqrt(-2.0 * log(pfa)); 
index = 0; 
for snr = 0:.01:22 
   index = index +1; 
   a = sqrt(2.0 * 10^(.1*snr)); 
   pro(index) = marcumsq(a,b); 
   prob(index) =  pd_swerling2 (nfa, 1, snr); 
end 
x = 0:.01:22; 
%figure(10) 
plot(x, pro,'k',x,prob,'k:'); 
axis([2 22 0 1]) 
xlabel ('SNR - dB') 
ylabel ('Probability of detection') 
legend('Swerling V','Swerling I') 
grid