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SAR signal processing with MATLAB 書籍和對(duì)應(yīng)代碼 matlab

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代碼片段和文件信息


????????%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
????????%????????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

?屬性????????????大小?????日期????時(shí)間???名稱
-----------?---------??----------?-----??----

?????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

............此處省略34個(gè)文件信息

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