10.htm

matlab7.0 编程基础 电子教程,大家看看有需要的吗

</span>[M,m,df]=Fftseq(m,ts)<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:forestgreen;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>%FFTSEQ<span style="mso-spacerun:
yes">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; </span><o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>fs=1/ts;<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:blue;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>if </span><span style='font-size:10.0pt;font-family:"Courier New";
mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>nargin==2<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'><span
style="mso-spacerun: yes">&nbsp;&nbsp; </span>n1=0;<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:blue;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>else<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:blue;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'><span style="mso-spacerun: yes">&nbsp;&nbsp; </span></span><span
style='font-size:10.0pt;font-family:"Courier New";mso-font-kerning:0pt;
mso-ansi-language:ZH-CN'>n1=fs/df;<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";color:blue;mso-font-kerning:0pt;mso-ansi-language:
ZH-CN'>end<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>n2=length(m);<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>n=2^(max(nextpow2(n1),nextpow2(n2)));<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>M=fft(m,n);<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>m=[m,zeros(1,n-n2)];<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>df=fs/n;<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:宋体;mso-ascii-font-family:"Courier New";mso-hansi-font-family:"Courier New";
mso-bidi-font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>下面是一个</span><span
style='font-size:10.0pt;font-family:"Courier New";mso-font-kerning:0pt;
mso-ansi-language:ZH-CN'>M</span><span style='font-size:10.0pt;font-family:
宋体;mso-ascii-font-family:"Courier New";mso-hansi-font-family:"Courier New";
mso-bidi-font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>文件调用的例子</span><span
style='font-size:10.0pt;font-family:"Courier New";mso-font-kerning:0pt;
mso-ansi-language:ZH-CN'><o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>t0=0.15;<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>ts=0.001;<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>fc=50;<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>fs=1/ts;<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>t=[0:ts:t0];<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>m=[ones(1,t0/(3*ts)),zeros(1,t0/(3*ts)),ones(1,t0/(3*ts)+1)];<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>ft1=m.*cos(2*pi*fc*t);<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>c=cos(2*pi*fc*t);<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>ft=ft1.*c;<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>df=0.25;<o:p></o:p></span></p>

<p class=MsoNormal align=left style='text-align:left;tab-stops:18.0pt 36.0pt 54.0pt 72.0pt 90.0pt 108.0pt 126.0pt 144.0pt 162.0pt 180.0pt 198.0pt 216.0pt 234.0pt 252.0pt 270.0pt 288.0pt 306.0pt 324.0pt 342.0pt 360.0pt 378.0pt 396.0pt 414.0pt 432.0pt 450.0pt 468.0pt 486.0pt 504.0pt 522.0pt 540.0pt 558.0pt 576.0pt;
mso-layout-grid-align:none;text-autospace:none'><span style='font-size:10.0pt;
font-family:"Courier New";mso-font-kerning:0pt;mso-ansi-language:ZH-CN'>[FT,ft,df1]=fftseq(ft,ts,df);<o:p></o:p></span></p>


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