function?mychirp
h=1.25*10^-8;?%采樣間隔時(shí)間1/80us
ptwidth=10^-6;%脈沖寬度1us
pcr=2*ptwidth;%脈沖周期2us
tcr=0:h:pcr;
pbwidth=10^7;%chirp信號(hào)帶寬
y=chirp（tcr0ptwidthpbwidth）;%產(chǎn)生chirp信號(hào)
pluse=rectpuls（tcrpcr）.*y;%rectpuls產(chǎn)生矩形脈沖，占空比0.5pcr/（tcr-0.5pcr）
circle=10;%脈沖個(gè)數(shù)10
cirpluse=zeros（1circle*length（pluse））;%存放周期脈沖的初始數(shù)組
for?i=1:circle
cirpluse（（（i-1）*length（pluse）+1）:i*length（pluse））=pluse;%得到周期脈沖
end
figure（1）;
subplot（211）
tt=0:（circle*pcr）/（（circle*length（pluse））-1）:（circle*pcr）;
plot（ttcirpluse）;
ffty=fft（cirpluse2*10^4?）/100;%對(duì)chirp序列進(jìn)行fft變換，幅度減小100倍2*10^4是FFT點(diǎn)數(shù)
f=tt/h;%各頻率點(diǎn)
subplot（212）
%plot（ffty）;
plot（f（1:floor（length（f）/2））10*log10（abs（ffty（1:floor（length（f）/2）））））;
%可以修改各參數(shù)值，得到不同的信號(hào)

?屬性????????????大小?????日期????時(shí)間???名稱
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?????文件????????754??2008-04-27?16:22??chirp\chirp\mychirp.asv

?????文件????????805??2008-04-27?16:26??chirp\chirp\mychirp.m

?????文件??????20498??2008-04-26?23:57??chirp\chirp\mychirpmdl.mdl

?????文件??????20369??2008-04-27?16:31??chirp\chirp\lfm.mdl

?????文件????????152??2008-04-27?12:59??chirp\chirp\mypluse.m

?????文件????????227??2008-04-27?12:06??chirp\chirp\mypluse.asv

?????文件????????323??2008-04-27?13:00??chirp\chirp\mychirp2.m

?????文件??????24496??2008-04-27?13:53??chirp\chirp\mychirp.fig

?????目錄??????????0??2008-04-26?23:57??chirp\chirp

?????目錄??????????0??2008-04-27?10:42??chirp

?????文件??????24485??2008-04-27?16:26??chirp\chirp\mychirpmatlab.fig

?????文件????????466??2008-04-27?16:48??chirp\chirp\讀我.txt

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????????????????92793????????????????????13