www.pudn.com > targer_point.zip > RCMC.m, change:2013-09-27,size:1394b


%=============================================== 
%%根据距离徙动公式,计算第一模糊区距离徙动与模糊能量的衰减情况 
%%吴铮 
%%20130927 
%================================================== 
 
clc; 
clear; 
cj=sqrt(-1); 
C=3e8;  %光速 
rad=pi/180; 
H=600; 
R0=6371.014; 
Rs=R0+H; 
Vst=100; 
%%典型雷达参数 
lamda_L=0.20; 
lamda_C=0.05; 
lamda_X=0.03; 
Fc=1e9; % 1GHz载波频率 
PRF_L=1600; 
PRF_C=1300; 
PRF_X=3400; 
DX_L=9; 
DX_C=9; 
DX_X=3.5; 
 
seta=15:1:60; 
R=(R0+H).*cos(seta*rad)-sqrt(R0^2-(R0+H)^2.*sin(seta*rad).*sin(seta*rad)) 
RCMC_L=PRF_L.*lamda_L^2.*R.*10^3./(4*Vst*DX_L); 
RCMC_C=PRF_C.*lamda_C^2.*R.*10^3./(4*Vst*DX_C); 
RCMC_X=PRF_X.*lamda_X^2.*R.*10^3./(4*Vst*DX_X); 
figure 
plot(seta,RCMC_L,seta,RCMC_C,seta,RCMC_X); 
grid on; 
legend('\fontsize{9}L频段(PRF=1600)','C频段(PRF=1300)','X频段(PRF=3400)'); 
xlabel('\fontsize{9}视角(Deg)'); 
ylabel('\fontsize{9}徙动距离(m)'); 
title('\fontsize{9}方位模糊(m=1)距离徙动距离'); 
 
%模糊能量衰减随视角的变化 
Ambiguities_L=-20.*log10(RCMC_L); 
Ambiguities_C=-20.*log10(RCMC_C); 
Ambiguities_X=-20.*log10(RCMC_X); 
figure 
plot(seta,Ambiguities_L,seta,Ambiguities_C,seta,Ambiguities_X); 
% plot(seta,Ambiguities_L); 
grid on; 
legend('\fontsize{9}L频段(PRF=1600)','C频段(PRF=1300)','X频段(PRF=3400)'); 
xlabel('\fontsize{9}视角(Deg)'); 
ylabel('\fontsize{9}模糊能量衰减(db)'); 
title('\fontsize{9}方位模糊(m=1)距离徙动引起的能量衰减');