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Raspberry Pi 的代码
ex4_19.m
% 切比雪夫-2带阻滤波器设计
% CHEBY2函数的应用
%
% 数字低通滤波器指标: % 切比雪夫-2型带阻:
ws = [0.4*pi 0.7*pi]; % 数字阻带边缘频率
wp = [0.25*pi 0.8*pi]; % 数字通带
fir.txt
%....... FIR数字滤波器设计..........%
clc,clear
% wp=0.2*pi;Rp=0.25dB; ws=0.3*pi;As=50dB;
% 查第237页表7.1可知用Hamming窗、Blackman窗均可(最小阻带衰减>=50dB)，
% 但Hamming窗具有较小的过渡带(6.6pi/M)，故选择Hamming窗。
wp=0.2*pi;ws=0.3*pi
phispan.m
function T=phispan(x,phitype,dilation,uo,a,bord1,bord2,Family,par);
% USAGE T=phispan(x,phitype,dilation,uo,a,bord1,bord2)
%
% This function returns a matrix Tij that contains elements
% \phi_
test7.c
#include "stdio.h"
#include "math.h"
double fun();
void main()
{
double pi;
pi=2*fun();
printf("\b=%lf\n",pi);
return ;
}
double fun()
{
double result=1;
float i=1;
double t,
cai6.m
a=7.865;
ap=0.5;
as=50;
wp=0.6*pi;
ws=0.5*pi;
for n=0:63
b=a*sqrt(1-((2*n/63-1))^2);
x=1;
for k=1:20
s=1;
for i=1:k
s=s*i;
end
x=
kechen4.m
fp=100;fs=120;ap=2;as=60;
wp=fp*2*pi;ws=fs*2*pi;
vp=1;vs=fs/fp;
k1=sqrt((10^(0.1*as)-1)/(10^(0.1*ap)-1));
N1=log(k1+sqrt(k1^2-1));
N2=log(vs+sqrt(vs^2-1));
N=ceil(N1/N2);
E=sqrt(10^(0.1*ap)-1);
cai5.m
Ws=0.6*pi;Wp=0.4*pi;ap=0.5;as=50;T=2;
Us=2*tan(0.5*Ws)/T;
Up=2*tan(0.5*Wp)/T;
Kp=1;Ksp=Us/Up;
ksp=sqrt((10^(0.1*ap)-1)/(10^(0.1*as)-1));
N=-log10(ksp)/log10(Ksp);
N=fix(N)+1;
Uc=Up*(10^(0.1*ap)
iir.m
%wp=0.2*pi; ws=0.3*pi; ap=1; as=15; T=1;
function IIR(wp,ws,ap,as,T)
x=[-4,-2,0,-4,-6,-4,-2,-4,-6,-6,-4,-4,-6,-6,-2,6,12,8,0,-16,-38,-60,-38,-60,-84,-90,-66,-32,-4,-2,-4,8,12,12,10,6,6,6,4,0,0,0,0,0
iir.c
#include"math.h"
#define IIRNUMBER 2
#define SIGNAL1F 1000
#define SIGNAL2F 4500
#define SAMPLEF 10000
#define PI 3.1415926
float InputWave();
float IIR();
float fBn[IIRNUMBER]={ 0.0,0.
iir.c
#include"math.h"
#define IIRNUMBER 2
#define SIGNAL1F 1000
#define SIGNAL2F 4500
#define SAMPLEF 10000
#define PI 3.1415926
float InputWave();
float IIR();
float fBn[IIRNUMBER]={ 0.0,0.