clc
clear?all
close?all

j?=?sqrt（-1）;
pi2?=?2*pi;
c?=?3e8;

%%?radar?parameters
fc?=?10e9;
lamda?=?c?/?fc;
Tp?=?2e-6;
B?=?800e6;
K?=?B?/?Tp;
PRF?=?1000;

%%?target?parameters
L?=?13;
x?=?[0?5?10?15...?
	-5?-10?-15...
	5?10?15...
	-5?-10?-15];
y?=?[0?5?10?15...
	5?10?15...
	-5?-10?-15...
	-5?-10?-15];
%?L?=?1;
%?x?=?[15];
%?y?=?[15];

scatters?=?x?+?j*y;
y0?=?100e3;
fai0?=?10/180*pi;
v?=?7.5e3;
x0?=?y0*tan（fai0）?+?（-500:v/PRF:500）;
%?bulk?location
bulk_pos?=?x0?+?j*y0;
M?=?length（bulk_pos）;

%%?receiving?design
%?ideal?reference?distances
Rref?=?abs（bulk_pos）;
taoref?=?2*Rref/c;

%?receiving?gate
ts_min?=?-2*15*sqrt（2）/c?-?Tp/2;
ts_max?=?2*15*sqrt（2）/c?+?Tp/2;
osv?=?1.2;				
fs?=?（ts_max?-?ts_min?-?Tp）*K*osv;
ts?=?ts_min:1/fs:ts_max;
N?=?length（ts）;

%%?backwave?simulation
raw?=?zeros（N?M）;
for?i?=?1:M
	for?l?=?1:L
		R?=?abs（bulk_pos（i）+scatters（l））;
		t?=?ts?+?taoref（i）;
		tao?=?2*R/c;
		win?=?（t?-?tao?>=?-Tp/2?&?t?-?tao?		raw（:?i）?=?raw（:?i）?+?...
			win.‘?.*?exp（j*pi2*（fc*（t-tao）+1/2*K*（t-tao）.^2））.‘;
	end
	%?dechirp
	sref?=?exp（j*2*pi*fc*（t-taoref（i））+j*pi*K*（t-taoref（i））.^2）;
	raw（:?i）?=?raw（:?i）?.*?sref‘;		%‘
end

save?data1


%%?

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件?????902796??2018-03-04?09:44??ISAR成像報告.pdf

?????文件???????1277??2018-01-24?04:36??code\backwave.m

?????文件?????647150??2018-01-27?12:15??code\data1.mat

?????文件?????649394??2018-01-27?12:27??code\data2.mat

?????文件???????2783??2018-01-24?03:59??code\ideal_case.m

?????文件????????831??2018-01-24?03:35??code\imagesc_data.m

?????文件???????1339??2018-01-27?12:23??code\movebackwave.m

?????文件???????3520??2018-01-27?12:22??code\move_case.m

?????文件????????333??2018-01-27?12:38??code\readme.txt

?????文件????????355??2018-01-21?13:30??code\sinc_interpl.m

?????目錄??????????0??2018-01-27?12:38??code

-----------?---------??----------?-----??----

??????????????2209778????????????????????11