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Raspberry Pi 的代码
ex081400.m
% Chapter 8: Example 8.14
% Impulse Invariance Transformation
% Elliptic Lowpass Filter Design
%
% Digital Filter Specifications:
wp = 0.2*pi;
ex082800.m
% Chapter 8: Example 8.28
% Chebyshev-1 Highpass Filter Design:
% Use of the CHEBY1 function
%
% Digital Filter Specifications: % Type: Chebyshev-I highpass
ws =
ex081300.m
% Chapter 8: Example 8.13
% Impulse Invariance Transformation
% Chebyshev-2 Lowpass Filter Design
%
% Digital Filter Specifications:
wp = 0.2*pi;
ex081200.m
% Chapter 8: Example 8.12
% Impulse Invariance Transformation
% Chebyshev-1 Lowpass Filter Design
%
% Digital Filter Specifications:
wp = 0.2*pi;
freqz_m.m
function [db,mag,pha,grd,w] = freqz_m(b,a);
% Modified version of freqz subroutine
% ------------------------------------
% [db,mag,pha,grd,w] = freqz_m(b,a);
% db = Relative magnitude in dB comp
lijian.m
n=1:1024;
x=cos(0.1*2*pi*n);
%tfrsp(x');
%tfrwv(x');
%tfrpwv(x');
tfrcw(x')
%tfrspwv(x');
lijian.m
n=1:1024;
x=cos(0.1*2*pi*n);
%tfrsp(x');
%tfrwv(x');
%tfrpwv(x');
tfrcw(x')
%tfrspwv(x');
dftxinhao1.m
clear;
N=16;
n=0:N-1;
k=0:N-1;
F1=0.320;
F2=0.560;
sga=0.01;
r1=randn(1,N);
r2=randn(1,N);
Z1=sga*sqrt(-2*log(r1)).*(cos(2*pi*r2));
Z2=sga*sqrt(-2*log(r1)).*(sin(2*pi*r2));
Z=Z1+j*Z2;
Xn=3
g.asv
function g=g(x)
g(x)=sqrt(((20000*(1+x*cos(40*pi/180))/(1-x^2))^3)/())*(2*atan(sqrt((1-x)/(1+x))*tan(40*pi/180))-x*sqrt(1-x^2)*sin(40*pi/180)/(1+x*cos(40*pi/180)));
exp5_fft_1_1.m
fs = 32000;
%fs = 32000/4; %%用于研究混叠现象
t = [0:1/fs:1];
%xa = cos(2*pi*1*1 *t)+cos(2*pi*1.5*1000*t)+cos(2*pi*9000*t);
xa = cos(2*pi*6.5*1000*t)+cos(2*pi*7*1000*t)+cos(2*pi*9000*t);
%N=16 FFT
N1 =