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Raspberry Pi 的代码
sy3_fft_bp.m
%滤除1+cos((2*pi*n)/3),保留cos((pi*n)/4)
omegap1=(3*pi)/16;omegap2=(5*pi)/16;Apmax=1;
omegar1=(1*pi)/16;omegar2=(5*pi)/9;Armin=50;
T=5*pi*10^(-6);
wp=[omegap1/pi,omegap2/pi];wr=[omegar1/pi,omegar2/pi]
sy3_fft_bs.m
%滤除cos((pi*n)/4),保留1+cos((2*pi*n)/3)
omegap1=(3*pi)/16;omegap2=(5*pi)/16;Apmax=1;
omegar1=(1*pi)/16;omegar2=(5*pi)/9;Armin=50;
T=5*pi*10^(-6);
wp=[omegap1/pi,omegap2/pi];wr=[omegar1/pi,omegar2/pi]
sy3_fft_lp.m
%滤除cos(2*pi/3*n)
omegap=pi/4;Apmax=3;
omegar=2/3*pi;Armin=50;
T=5*pi*10^(-6);
wp=[omegap/pi];wr=[omegar/pi];
[N,wc]=buttord(wp,wr,Apmax,Armin,'s');
[b,a]=butter(N,wc,'low');
sysl=tf(b,a)
w=lin
untitled4.m
N=512;
Nfft=1024;
Fs=2*pi;
f1=50;
f2=120;
fs=300;
f1=f1/fs;
f2=f2/fs;
n=0:N-1;
xn=sin(2*pi*f1*n)+sin(2*pi*f2*n)+randn(size(n));
L=input('L=');
window=boxcar(L);
noverlap=L/2;
[pxx2,f]=psd
untitled6.m
N=100;
L=512;
f1=100;
f2=110;
fs=250;
T=1/fs;
ws=2*pi*fs;
t=(0:N-1)*T;
f=cos(2*pi*f1*t)+0.75*cos(2*pi*f2*t);
wh=(hamming(N))';
f=f.*wh;
F=fftshift(fft(f,L));
w=(-ws/2+(0:L-1)*ws/L)/(2*pi);
untitled5.m
N=100;
L=512;
f1=100;
f2=110;
fs=250;
T=1/fs;
ws=2*pi*fs;
t=(0:N-1)*T;
f=cos(2*pi*f1*t)+0.75*cos(2*pi*f2*t);
wh=(kaiser(N,6))';
f=f.*wh;
F=fftshift(fft(f,L));
w=(-ws/2+(0:L-1)*ws/L)/(2*pi)
untitle3.m
N=50;
f1=50;
f2=120;
fs=300;
T=1/fs;
ws=2*pi*fs;
t=(0:N-1)*T;
f=sin(2*pi*f1*t)+sin(2*pi*f2*t)+randn(1,N);
wh=(hamming(N))';
f=f.*wh;
F=fftshift(fft(f,L));
w=(-ws/2+(0:L-1)*ws/L)/(2*pi);
pl
untitled2.m
N=256;
L=256;
fs=16;
T=1/fs;
ws=2*pi*fs;
t=(0:N-1)*T;
f=exp((-2)*t);
F=fftshift(fft(f,L));
w=(-ws/2+(0:L-1)*ws/L)/2*pi;
plot(w,abs(F));
xlabel('w');
ylabel('exp((-2*t))的幅度谱')
gamicheval.m
function [sol,val] = gaMichEval(sol,options)
val = 21.5 + sol(1) * sin(4*pi*sol(1)) + sol(2)*sin(20*pi*sol(2));
%G=zeros(0);
%val = sqrt(sol(1)) * sin(2*sol(1)) + sqrt(sol(1))*cos(5*sol(1))+5;
gamicheval.m
function [sol,val] = gaMichEval(sol,options)
val = 21.5 + sol(1) * sin(4*pi*sol(1)) + sol(2)*sin(20*pi*sol(2));
%G=zeros(0);
%val = sqrt(sol(1)) * sin(2*sol(1)) + sqrt(sol(1))*cos(5*sol(1))+5;