%?demo?of?LFM?pulse?radar
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%???????????????????????參數
%?T：chirp信號的持續脈寬
%?B：chirp信號的調頻帶寬
%?Rmin：觀測目標距雷達的最近位置
%?Rmax：觀測目標距雷達的最遠位置
%?R：一維數組，數組值表示每個目標相對雷達的斜距
%?RCS：一維數組，數組值表示每個目標的雷達散射截面
%
%?%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%?function?LFM_radar（TBRminRmaxRRCS）
%?if?nargin==0
????T=10e-6;
????B=30e6;
????Rmin=10000;
????Rmax=15000;
????R=[105001100012000120081300013002];
????RCS=[1?1?1?1?1?1];
%?end
%???????????????????parameter
c=3e8;
K=B/T;
Rwid=Rmax-Rmin;??%?接收到的?距離窗
Twid=2*Rwid/c;???%?時延
Fs=5*B;??????????%?采樣頻率
Ts=1/Fs;?
Nwid=ceil（Twid/Ts）;?????????????%?5000
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%?雷達回波
t=linspace（2*Rmin/c2*Rmax/cNwid）;???%?t的有效時間范圍
M=length（