• 大小: 1.85MB
    文件类型: .rar
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    发布日期: 2023-09-01
  • 语言: 其他
  • 标签: SAR面目标  

资源简介

根据一个图像数据矩阵数据模拟面目标的SAR原始回波信号,然后通过成像算法实现成像

资源截图

代码片段和文件信息

%%========================================================
clear;clc;close all;
%%========================================================
%%Parameter--constant
C=3e8;                           %propagation speed
%%Parameter--radar characteristics
Fc=1e9;                          %carrier frequency 1GHz
lambda=C/Fc;                     %wavelength 
%%Parameter--target area
Xmin=0;                          %target area in azimuth is within[XminXmax]
Xmax=50;                  
Yc=10000;                        %center of imaged area
Y0=500;                          %target area in range is within[Yc-Y0Yc+Y0]
                                 %imaged width 2*Y0
%%Parameter--orbital information
V=100;                           %SAR velosity 100 m/s
H=5000;                          %height 5000 m
R0=sqrt(Yc^2+H^2);
%%Parameter--antenna
D=4;                            %antenna length in azimuth direction
Lsar=lambda*R0/D;               %SAR integration length
Tsar=Lsar/V;                     %SAR integration time
%%Parameter--slow-time domain
Ka=-2*V^2/lambda/R0;            %doppler frequency modulation rate
Ba=abs(Ka*Tsar);                %doppler frequency modulation bandwidth
PRF=Ba;                        %pulse repitition frequency
PRT=1/PRF;                     %pulse repitition time
ds=PRT;                         %sample spacing in slow-time domain
Nslow=ceil((Xmax-Xmin+Lsar)/V/ds); %sample number in slow-time domain
Nslow=2^nextpow2(Nslow);          %for fft
sn=linspace((Xmin-Lsar/2)/V(Xmax+Lsar/2)/VNslow);%discrete time array in slow-time domain
PRT=(Xmax-Xmin+Lsar)/V/Nslow;    %refresh
PRF=1/PRT;
ds=PRT;
%%Parameter--fast-time domain
Tr=5e-6;                         %pulse duration 10us
Br=30e6;                        %chirp frequency modulation bandwidth 30MHz
Kr=Br/Tr;                        %chirp slope
Fsr=3*Br;                        %sampling frequency in fast-time domain
dt=1/Fsr;                         %sample spacing in fast-time domain
Rmin=sqrt((Yc-Y0)^2+H^2);
Rmax=sqrt((Yc+Y0)^2+H^2+(Lsar/2)^2);
Nfast=ceil(2*(Rmax-Rmin)/C/dt+Tr/dt);%sample number in fast-time domain
Nfast=2^nextpow2(Nfast);                   %for fft
tm=linspace(2*Rmin/C2*Rmax/C+TrNfast); %discrete time array in fast-time domain
dt=(2*Rmax/C+Tr-2*Rmin/C)/Nfast;    %refresh
Fsr=1/dt;
%%Parameter--resolution
DY=C/2/Br;                          %range resolution
DX=D/2;                            %cross-range resolution
%%Parameter--point targets
Ntarget=2;                           %number of targets
%format [x y reflectivity]
Ptarget=[XminYc1                    %position of targets
              XminYc+10*DY1
              Xmin+20*DXYc+50*DY1];  
disp(‘Parameters:‘)
disp(‘Sampling Rate in fast-time domain‘);disp(Fsr/Br)
disp(‘Sampling Number in fast-time domain‘);disp(Nfast)
disp(‘Sampling Rate in slow-time domain‘);disp(PRF/Ba)
disp(‘Sampling Number in slow-time domain‘);disp(Nslow)
disp(‘R

 属性            大小     日期    时间   名称
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     文件       5748  2010-01-27 09:16  rawdata\dian.m

     文件         78  2010-01-31 20:05  rawdata\ftx.m

     文件         79  2010-01-31 20:05  rawdata\fty.m

     文件       3593  2010-01-28 11:03  rawdata\fwxz.m

     文件       3477  2010-01-31 20:42  rawdata\hh.m

     文件         81  2010-01-31 20:05  rawdata\iftx.m

     文件         84  2010-01-31 20:05  rawdata\ifty.m

     文件       3915  2010-01-28 10:44  rawdata\jlxz.m

     文件      14194  2010-01-27 15:20  rawdata\mian\1.jpg

     文件      24462  2010-01-27 15:27  rawdata\mian\2.jpg

     文件     112202  2010-01-27 15:27  rawdata\mian\3.jpg

     文件     122494  2010-01-27 15:28  rawdata\mian\4.jpg

     文件      45993  2010-01-27 16:30  rawdata\mian\5.jpg

     文件         78  2010-01-13 15:25  rawdata\mian\ftx.m

     文件         79  2010-01-13 15:25  rawdata\mian\fty.m

     文件         81  2010-01-13 15:25  rawdata\mian\iftx.m

     文件         84  2010-01-13 15:25  rawdata\mian\ifty.m

     文件       6012  2010-01-27 10:21  rawdata\mian\mian.m

     文件        452  2010-01-30 19:10  rawdata\mian\RCSmat.m

     文件     276084  2010-01-28 12:03  rawdata\mian\新建 Microsoft Office Word 文档.docx

     文件      14146  2010-01-27 15:23  rawdata\mian\旋转 1.jpg

     文件      45772  2010-01-27 16:30  rawdata\mian\旋转 5.jpg

     文件         78  2010-01-13 15:25  rawdata\mian1\ftx.m

     文件         79  2010-01-13 15:25  rawdata\mian1\fty.m

     文件         81  2010-01-13 15:25  rawdata\mian1\iftx.m

     文件         84  2010-01-13 15:25  rawdata\mian1\ifty.m

     文件       4511  2010-01-30 19:10  rawdata\mian1\mian1.m

     文件        462  2010-01-30 19:09  rawdata\mian1\RCSmat.m

     文件      12853  2010-01-28 16:38  rawdata\mian1\untitled.jpg

     文件      12739  2010-01-28 16:40  rawdata\mian1\旋转 untitled.jpg

............此处省略60个文件信息

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