资源简介
SAR signal processing with MATLAB 书籍和对应代码 matlab
代码片段和文件信息
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% CROSS-RANGE IMAGING %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
colormap(gray(256))
cj=sqrt(-1);
pi2=2*pi;
%
c=3e8; % propagation speed
fc=200e6; % frequency
lambda=c/fc; % Wavelength
k=pi2/lambda; % Wavenumber
Xc=1.e3; % Range distance to center of target area
%
% Case 1:
L=400; % synthetic aperture is 2*L
Y0=100; % target area in cross-range is within [Yc-Y0Yc+Y0]
Yc=0; % Cross-range distance to center of target area
%
% Case 2:
% L=150;
% Y0=200;
% Yc=.5e3;
%
theta_c=atan(Yc/Xc); % squint angle to center of target area
Rc=sqrt(Xc^2+Yc^2); % squint range to center of target area
kus=2*k*sin(theta_c); % Doppler frequency shift in ku domain due to squint
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Program performs slow-time compression to save PRF %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
Xcc=Xc/(cos(theta_c)^2); % redefine Xc by Xcc for squint processing
%
du=(Xcc*lambda)/(4*(Y0+L)); % sample spacing in aperture domain
duc=(Xcc*lambda)/(4*Y0); % sample spacing in aperture domain
% for compressed signal
DY=(Xcc*lambda)/(4*L); % Cross-range resolution
%
L_min=max(Y0L); % Zero-padded aperture
%
% u domain parameters and arrays for compressed signal
%
mc=2*ceil(L_min/duc); % number of samples on aperture
uc=duc*(-mc/2:mc/2-1); % synthetic aperture array
dkuc=pi2/(mc*duc); % sample spacing in ku domain
kuc=dkuc*(-mc/2:mc/2-1); % kuc array
%
dku=dkuc; % sample spacing in ku domain
%
% u domain parameters and arrays for Synthetic aperture signal
%
m=2*ceil(pi/(du*dku)); % number of samples on aperture
du=pi2/(m*dku);
u=du*(-m/2:m/2-1); % synthetic aperture array
ku=dku*(-m/2:m/2-1); % ku array
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%% SIMULATION %%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
ntarget=4; % Number of targets
%
% Targets‘ coordinates and reflectivity
yn(1)=0; fn(1)=1;
yn(2)=.7*Y0; fn(2)=1;
yn(3)=yn(2)-4*DY; fn(3)=1.;
yn(4)=-.8*Y0; fn(4)=1;
%
s=zeros(1mc); % Measured Echoed Signal (baseband)
for i=1:ntarget;
dis=sqrt(Xc^2+(Yc+yn(i)-uc).^2);
s=s+fn(i)*exp(-cj*2*k*dis).*(abs(uc) <= L);
end;
%
s=s.*exp(-cj*kus*uc); % Slow-time baseband conversion for squint
fs=fty(s); % aliased aperture signal spectrum
%
plot(ucreal(s))
xlabel(‘Synthetic Aperture u meters‘)
ylabel(‘Real Part‘)
title(‘Aliased Aperture Signal‘)
axis([uc(1) uc(mc) 1.1*min(real(s)) 1.1*max(real(s))]);
axis(‘square‘)
print P2.1a.ps
pause(1)
%
plot(kuc+kusabs(fs))
xlabel(‘Synthetic Aperture Frequency ku rad/m‘)
ylabel(‘Magnitude‘)
title(‘Aliased Aperture Signal Spectrum‘)
axis(‘square‘)
prin
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
文件 6377 1999-02-19 09:10 SAR signal processing with MATLAB\soumekh\crange.m
文件 182 1999-02-19 09:10 SAR signal processing with MATLAB\soumekh\ftx.m
文件 188 1999-02-19 09:10 SAR signal processing with MATLAB\soumekh\fty.m
文件 183 1999-02-19 09:10 SAR signal processing with MATLAB\soumekh\iftx.m
文件 190 1999-02-19 09:10 SAR signal processing with MATLAB\soumekh\ifty.m
文件 10037 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P1.10a.ps
文件 35201 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P1.1a.ps
文件 36632 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P1.2a.ps
文件 29708 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P1.3a.ps
文件 29193 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P1.4a.ps
文件 29566 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P1.5a.ps
文件 10045 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P1.6a.ps
文件 30692 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P1.7a.ps
文件 8679 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P1.8a.ps
文件 35943 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P1.9a.ps
文件 13981 1999-02-19 10:44 SAR signal processing with MATLAB\soumekh\P2.10a.ps
文件 8568 1999-02-19 10:44 SAR signal processing with MATLAB\soumekh\P2.1a.ps
文件 8957 1999-02-19 10:44 SAR signal processing with MATLAB\soumekh\P2.2a.ps
文件 8633 1999-02-19 10:44 SAR signal processing with MATLAB\soumekh\P2.3a.ps
文件 9687 1999-02-19 10:44 SAR signal processing with MATLAB\soumekh\P2.4a.ps
文件 16384 1999-02-19 10:44 SAR signal processing with MATLAB\soumekh\P2.5a.ps
文件 13895 1999-02-19 10:44 SAR signal processing with MATLAB\soumekh\P2.6a.ps
文件 14380 1999-02-19 10:44 SAR signal processing with MATLAB\soumekh\P2.7a.ps
文件 13736 1999-02-19 10:44 SAR signal processing with MATLAB\soumekh\P2.8a.ps
文件 10078 1999-02-19 10:44 SAR signal processing with MATLAB\soumekh\P2.9a.ps
文件 27918 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P3.1a.ps
文件 11300 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P3.2a.ps
文件 27231 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P3.3a.ps
文件 13699 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P3.4a.ps
文件 26504 1999-02-19 10:45 SAR signal processing with MATLAB\soumekh\P3.5a.ps
............此处省略34个文件信息
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