www.pudn.com > radarsignalprocessing.zip > MTI雷达参差比取不同的值对盲速的影响.m, change:2007-12-10,size:778b

%%%%%%%%%%%%%%%%%%%  n1/n2取不同的值对盲速的影响 
clc; 
fofr=0.01:0.001:32; 
fofr1=0.01:0.001:17; 
 
a=63.0/64.0;         %%%%%%% n1/n2=63/64 
a1=33.0/34.0;        %%%%%%% n1/n2=33/34 
term1=(1-2.*cos(a*2*pi*fofr)+cos(4*pi*fofr)).^2; 
term11=(1-2.*cos(a1*2*pi*fofr1)+cos(4*pi*fofr1)).^2; 
term2=(-2*sin(a*2*pi*fofr)+sin(4*pi*fofr)).^2; 
term22=(-2*sin(a1*2*pi*fofr1)+sin(4*pi*fofr1)).^2; 
 
resp=.25.*sqrt(term1+term2); 
resp1=.25.*sqrt(term11+term22); 
 
resp=10.*log(resp); 
resp1=10.*log(resp1); 
subplot(2,1,1); 
plot(fofr,resp,'r'); 
xlabel('盲速提高的倍率，n1/n2=63/64'); 
ylabel('Filter response(dB)'); 
axis([0 32 -40 0]); 
grid; 
 
subplot(2,1,2); 
plot(fofr1,resp1); 
xlabel('盲速提高的倍率，n1/n2=33/34'); 
ylabel('Filter response(dB)'); 
axis([0 17 -40 0]); 
grid;