代码搜索：Fir 开发教程
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www.eeworm.com/read/391151/8419262
c fir.c
//Fir.c FIR filter. Include coefficient file with length N
#include "bs2700.cof" //coefficient file BS @ 2700Hz
int yn = 0; //initialize filter's output
short dly[N];
www.eeworm.com/read/389982/8490499
fig fir.fig
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asv fir.asv
wc=0.25*pi;N=33;
alpha=(N-1)/2;
n=0:1:N-1;
m=n-alpha+eps;
hd=sin(wc*m)./(pi*m);
wd2=hanning(N)';b2=hd.*wd2;
[H2,w]=freqz(b2,1);
subplot(2,2,1)
plot(w,abs(H2),'-.g')
legend('升余弦窗低通滤波器')
subpl
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m fir.m
wc=0.25*pi;N=33;
alpha=(N-1)/2;
n=0:1:N-1;
m=n-alpha+eps;
hd=sin(wc*m)./(pi*m);
wd2=hanning(N)';b2=hd.*wd2;
[H2,w]=freqz(b2,1);
subplot(2,2,1)
plot(w,abs(H2),'-.g')
legend('升余弦窗低通滤波器')
subpl
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m fir.m
%利用Hamming窗设计FIR数字低通滤波器
ap=3;as=30;
fp=30; fs=50;
Fs=200;
Wp=0.3*pi;Ws=0.5*pi;
%确定滤波器阶数
f=(fs-fp)/Fs;
N=3.3/f;
M=N-1;
fprintf('滤波器阶数=% .0f\n',M);
%理想低通截频
Wc=(Wp+Ws)/2;
%窗函数的值
k=0:M;
Wk=0
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jad fir.jad
MIDlet-1: FIR, /logo.png, FIRMIDlet
MIDlet-Jar-Size: 100
MIDlet-Jar-URL: FIR.jar
MIDlet-Name: FIR
MIDlet-Vendor: Unknown
MIDlet-Version: 1.0
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile:
www.eeworm.com/read/289068/8581570
m fir.m
% fir.m - sample processing algorithm for FIR filter.
%
% [y, w] = fir(M, h, w, x)
%
% h = order-M filter (row vector)
% w = filter state (row vector)
% x = scalar input
% y = scalar output
% based on
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obj fir.obj
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mak fir.mak
/************* Code Composer V1 Project Data ********************
The following section contains data generated by Code Composer
to store project information like build options, source filenames
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cmd fir.cmd
MEMORY
{
PAGE 0:
VECT : o = 0000h , l = 0040h
EX_ROM : o = 0040h , l = 7fc0h
PAGE 1:
B2 : o = 0060h , l = 0020h
B1 : o = 0300h , l = 0100h