📄 基于matlab的fir滤波器设计与滤波——天芯网_skychip_cn.mht
字号:
=B4=B4=EF=B5=BD=C6=B5=D3=F2=C2=CB=B2=A8=B5=C4=C4=BF=B5=C4=A1=A3=B8=F9=BE=DD=
=C6=E4=B5=A5=CE=BB=B3=E5=BC=A4=CF=EC=D3=A6=BA=AF=CA=FD=B5=C4=CA=B1=D3=F2=CC=
=D8=D0=D4=BF=C9=B7=D6=CE=AA=C1=BD=C0=E0=A3=BA=CE=DE=CF=DE=B3=E5=BC=A4=CF=EC=
=D3=A6=A3=A8IIR=A3=A9=C2=CB=B2=A8=C6=F7=BA=CD=D3=D0=CF=DE=B3=E5=BC=A4=CF=EC=
=D3=A6=A3=A8FIR=A3=A9=C2=CB=B2=A8=C6=F7=A1=A3=D3=EBIIR=C2=CB=B2=A8=C6=F7=CF=
=E0=B1=C8=A3=ACFIR=B5=C4=CA=B5=CF=D6=CA=C7=B7=C7=B5=DD=B9=E9=B5=C4=A3=AC=D7=
=DC=CA=C7=CE=C8=B6=A8=B5=C4=A3=BB=B8=FC=D6=D8=D2=AA=B5=C4=CA=C7=A3=ACFIR=C2=
=CB=B2=A8=C6=F7=D4=DA=C2=FA=D7=E3=B7=F9=C6=B5=CF=EC=D3=A6=D2=AA=C7=F3=B5=C4=
=CD=AC=CA=B1=A3=AC=BF=C9=D2=D4=BB=F1=B5=C3=D1=CF=B8=F1=B5=C4=CF=DF=D0=D4=CF=
=E0=CE=BB=CC=D8=D0=D4=A1=A3=D2=F2=B4=CB=A3=AC=CB=FC=D4=DA=B8=DF=B1=A3=D5=E6=
=B5=C4=D0=C5=BA=C5=B4=A6=C0=ED=A3=AC=C8=E7=CA=FD=D7=D6=D2=F4=C6=B5=A1=A2=CD=
=BC=CF=F1=B4=A6=C0=ED=A1=A2=CA=FD=BE=DD=B4=AB=CA=E4=A1=A2=C9=FA=CE=EF=D2=BD=
=D1=A7=B5=C8=C1=EC=D3=F2=B5=C3=B5=BD=B9=E3=B7=BA=D3=A6=D3=C3=A1=A3</P>
<P><STRONG>2 FIR=C2=CB=B2=A8=C6=F7=B5=C4=B4=B0=BA=AF=CA=FD=C9=E8=BC=C6=
=B7=A8<BR></STRONG> =20
FIR=C2=CB=B2=A8=C6=F7=B5=C4=C9=E8=BC=C6=B7=BD=B7=A8=D3=D0=D0=ED=B6=E0=D6=D6=
=A3=AC=C8=E7=B4=B0=BA=AF=CA=FD=C9=E8=BC=C6=B7=A8=A1=A2=C6=B5=C2=CA=B2=C9=D1=
=F9=C9=E8=BC=C6=B7=A8=BA=CD=D7=EE=D3=C5=BB=AF=C9=E8=BC=C6=B7=A8=B5=C8=A1=A3=
=B4=B0=BA=AF=CA=FD=C9=E8=BC=C6=B7=A8=B5=C4=BB=F9=B1=BE=D4=AD=C0=ED=CA=C7=D3=
=C3=D2=BB=B6=A8=BF=ED=B6=C8=B4=B0=BA=AF=CA=FD=BD=D8=C8=A1=CE=DE=CF=DE=C2=F6=
=B3=E5=CF=EC=D3=A6=D0=F2=C1=D0=BB=F1=B5=C3=D3=D0=CF=DE=B3=A4=B5=C4=C2=F6=B3=
=E5=CF=EC=D3=A6=D0=F2=C1=D0=A3=AC=D6=F7=D2=AA=C9=E8=BC=C6=B2=BD=D6=E8=CE=AA=
=A3=BA<BR> =20
(1) =CD=A8=B9=FD=B8=B5=C0=EF=D2=B6=C4=E6=B1=E4=BB=BB=BB=F1=B5=C3=C0=ED=
=CF=EB=C2=CB=B2=A8=C6=F7=B5=C4=B5=A5=CE=BB=C2=F6=B3=E5=CF=EC=D3=A6hd(n)=A1=
=A3</P>
<P><A=20
href=3D"http://www.skychip.cn/article/TxwUploadFiles/articleImg/200610232=
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target=3D_blank><IMG alt=3D""=20
src=3D"http://www.skychip.cn/article/TxwUploadFiles/articleImg/2006102322=
471938235.gif"=20
onload=3Dresizeimg(this); align=3DabsMiddle=20
border=3D0></A><BR> <BR> =20
(2) =D3=C9=D0=D4=C4=DC=D6=B8=B1=EA=C8=B7=B6=A8=B4=B0=BA=AF=CA=FDW(n)=
=BA=CD=B4=B0=BF=DA=B3=A4=B6=C8N=A1=A3<BR> =20
(3) =C7=F3=B5=C3=CA=B5=BC=CA=C2=CB=B2=A8=C6=F7=B5=C4=B5=A5=CE=BB=C2=F6=
=B3=E5=CF=EC=D3=A6h(n)=A3=AC =
h(n)=BC=B4=CE=AA=CB=F9=C9=E8=BC=C6FIR=C2=CB=B2=A8=C6=F7=CF=B5=CA=FD=CF=F2=
=C1=BFb(n)=A1=A3<BR> =20
<A=20
href=3D"http://www.skychip.cn/article/TxwUploadFiles/articleImg/200610232=
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target=3D_blank><IMG alt=3D""=20
src=3D"http://www.skychip.cn/article/TxwUploadFiles/articleImg/2006102322=
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onload=3Dresizeimg(this); align=3DabsMiddle =
border=3D0></A><BR> =20
(4) =BC=EC=D1=E9=C2=CB=B2=A8=C6=F7=D0=D4=C4=DC=A1=A3<BR> =
=20
=B1=BE=CE=C4=BD=AB=D5=EB=B6=D4=D2=BB=B8=F6=BA=AC=D3=D05Hz=A1=A215Hz=BA=CD=
30Hz=B5=C4=BB=EC=BA=CD=D5=FD=CF=D2=B2=A8=D0=C5=BA=C5=A3=AC=C9=E8=BC=C6=D2=
=BB=B8=F6FIR=B4=F8=CD=A8=C2=CB=B2=A8=C6=F7=A3=AC=B8=F8=B3=F6=C0=FB=D3=C3M=
ATLAB=CA=B5=CF=D6=B5=C4=C8=FD=D6=D6=B7=BD=B7=A8=A3=BA=B3=CC=D0=F2=C9=E8=BC=
=C6=B7=A8=A1=A2FDATool=C9=E8=BC=C6=B7=A8=BA=CDSPTool=C9=E8=BC=C6=B7=A8=A1=
=A3=B2=CE=CA=FD=D2=AA=C7=F3=A3=BA=B2=C9=D1=F9=C6=B5=C2=CAfs=3D100Hz=A3=AC=
=CD=A8=B4=F8=CF=C2=CF=DE=BD=D8=D6=B9=C6=B5=C2=CAfc1=3D10=20
Hz=A3=AC=CD=A8=B4=F8=C9=CF=CF=DE=BD=D8=D6=B9=C6=B5=C2=CAfc2=3D20 =
Hz=A3=AC=B9=FD=B6=C9=B4=F8=BF=ED6 =
Hz=A3=AC=CD=A8=D7=E8=B4=F8=B2=A8=B6=AF0.01=A3=AC=B2=C9=D3=C3=BF=AD=C8=FB=B4=
=B0=C9=E8=BC=C6=A1=A3</P>
<P><STRONG>2 =
=B3=CC=D0=F2=C9=E8=BC=C6=B7=A8</STRONG><BR> =20
MATLAB=D0=C5=BA=C5=B4=A6=C0=ED=B9=A4=BE=DF=CF=E4=CC=E1=B9=A9=C1=CB=B8=F7=D6=
=D6=B4=B0=BA=AF=CA=FD=A1=A2=C2=CB=B2=A8=C6=F7=C9=E8=BC=C6=BA=AF=CA=FD=BA=CD=
=C2=CB=B2=A8=C6=F7=CA=B5=CF=D6=BA=AF=CA=FD=A1=A3=B1=BE=CE=C4=B5=C4=B4=F8=CD=
=A8=C2=CB=B2=A8=C6=F7=C9=E8=BC=C6=BC=B0=C2=CB=B2=A8=B3=CC=D0=F2=C8=E7=CF=C2=
=A3=BA<BR> =20
[n,Wn,beta,ftype]=3Dkaiserord([7 13 17 23],[0 1 0],[0.01 0.01 =
0.01],100);=20
<BR> =
%=B5=C3=B3=F6=C2=CB=B2=A8=C6=F7=B5=C4=BD=D7=CA=FDn=3D38=A3=ACbeta=3D3.4<B=
R> w1=3D2*fc1/fs;=20
w2=3D2*fc2/fs;%=BD=AB=C4=A3=C4=E2=C2=CB=B2=A8=C6=F7=B5=C4=BC=BC=CA=F5=D6=B8=
=B1=EA=D7=AA=BB=BB=CE=AA=CA=FD=D7=D6=C2=CB=B2=A8=C6=F7=B5=C4=BC=BC=CA=F5=D6=
=B8=B1=EA<BR> =20
window=3Dkaiser(n+1,beta);%=CA=B9=D3=C3kaiser=B4=B0=BA=AF=CA=FD<BR> =
b=3Dfir1(n,[w1=20
w2],window);=CA=B9=D3=C3=B1=EA=D7=BC=C6=B5=C2=CA=CF=EC=D3=A6=B5=C4=BC=D3=B4=
=B0=C9=E8=BC=C6=BA=AF=CA=FDfir1<BR> =20
freqz(b,1,512);%=CA=FD=D7=D6=C2=CB=B2=A8=C6=F7=C6=B5=C2=CA=CF=EC=D3=A6<BR=
> t =3D=20
(0:100)/Fs;<BR> s =3D=20
sin(2*pi*t*5)+sin(2*pi*t*15)+sin(2*pi*t*30);%=BB=EC=BA=CD=D5=FD=CF=D2=B2=A8=
=D0=C5=BA=C5<BR> sf =3D=20
filter(b,1,s);=A3=A5=B6=D4=D0=C5=BA=C5s=BD=F8=D0=D0=C2=CB=B2=A8<BR> =
=
=B3=CC=D0=F2=D6=B4=D0=D0=B5=C4=BD=E1=B9=FB=C8=E7=CD=BC1=CB=F9=CA=BE=A3=BA=
</P>
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onload=3Dresizeimg(this); align=3DabsMiddle border=3D0></A><BR> =20
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p; =20
=A3=A82=A3=A9=C2=CB=B2=A8=C7=B0=BA=F3=B5=C4=B2=A8=D0=CE<BR>=CD=BC1 =
=C2=CB=B2=A8=C6=F7=CC=D8=D0=D4=BA=CD=C2=CB=B2=A8=D0=A7=B9=FB=CD=BC</P>
<P><BR><STRONG>4 FDATool=C9=E8=BC=C6=B7=A8</STRONG><BR> &=
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Design & Analysis=20
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=C4=C2=CB=B2=A8=C6=F7=C9=E8=BC=C6=B7=D6=CE=F6=B9=A4=BE=DF=A3=AC=B2=D9=D7=F7=
=BC=F2=B5=A5=A1=A2=C1=E9=BB=EE=A3=AC=BF=C9=D2=D4=B2=C9=D3=C3=B6=E0=D6=D6=B7=
=BD=B7=A8=C9=E8=BC=C6FIR=BA=CDIIR=C2=CB=B2=A8=C6=F7=A1=A3=D4=DAMATLAB=C3=FC=
=C1=EE=B4=B0=BF=DA=CA=E4=C8=EBFDATool=BA=F3=BB=D8=B3=B5=BE=CD=BB=E1=B5=AF=
=B3=F6FDATool=BD=E7=C3=E6=A1=A3<BR><STRONG>4.1=20
=B4=F8=CD=A8=C2=CB=B2=A8=C6=F7=C9=E8=BC=C6</STRONG><BR> =
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=D2=D1=D6=AA=C2=CB=B2=A8=C6=F7=B5=C4=BD=D7=CA=FDn=3D38=A3=ACbeta=3D3.4=A1=
=A3=B1=BE=C0=FD=D6=D0=A3=AC=CA=D7=CF=C8=D4=DAFilter=20
Type=D6=D0=D1=A1=D4=F1Bandpass=A3=BB=D4=DADesign =
Method=D1=A1=CF=EE=D6=D0=D1=A1=D4=F1FIR=20
Window=A3=AC=BD=D3=D7=C5=D4=DAWindow=D1=A1=CF=EE=D6=D0=D1=A1=C8=A1Kaiser=A3=
=ACBeta=D6=B5=CE=AA3.4=A3=BB=D6=B8=B6=A8Filter =
Order=CF=EE=D6=D0=B5=C4Specify=20
order=CE=AA38=A3=BB=B2=C9=D1=F9=C6=B5=C2=CAFs=3D100Hz,=BD=D8=D6=B9=C6=B5=C2=
=CAFc1=3D10Hz,Fc2=3D20Hz=A1=A3=C9=E8=D6=C3=CD=EA=D2=D4=BA=F3=B5=E3=BB=F7=B4=
=B0=BF=DA=CF=C2=B7=BD=B5=C4Design=20
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=D6=C3=B5=C8=A1=A3=C9=E8=BC=C6=CD=EA=B3=C9=BA=F3=BD=AB=BD=E1=B9=FB=B1=A3=B4=
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