代码搜索结果

n=[0:1:99];x=cos(0.48*pi*n)+cos(0.52*pi*n); subplot(2,1,1);stem(n,x);title('signal 0

n=[0:10]; x=(0.9*exp(j*pi/3)).^n; k=-200:200;w=(pi/100)*k; X=x*exp(-j*pi/100.*(n'*k)); magX=abs(X);angX=angle(X); subplot(2,1,1);plot(w/pi,magX);grid; xlabel('Frequency');ylabel('amplitude'); s

n=[0:1:99];x=cos(0.48*pi*n)+cos(0.52*pi*n); n1=[0:1:9];x1=x(1:1:10); subplot(2,2,1);stem(n1,x1);title('signal 0

w=[0:1:500]*pi/500; X=exp(j*w)./(exp(j*w)-0.5*ones(1,501)); magX=abs(X);angX=angle(X); realX=real(X);imagX=imag(X); subplot(2,2,1);plot(w/pi,magX);grid; xlabel('frequency');ylabel('amplitude');ti

Wp=0.2*pi;Ws=0.3*pi;Rp=7;As=16; Ripple=10^(-Rp/20);Attn=10^(-As/20); % Analog filter design; [b,a]=afd_butt(Wp,Ws,Rp,As) %***Butterworth Filter Order=3 %Calculation of second-order sections: [C,

% example 9 x=linspace(0,2*pi,30); y=sin(x); z=cos(x); plot(x,y,'g:',x,z,'r-',x,y,'bo',x,y,'c+')

n=0:100;x=cos(pi*n/2); k=-100:100;w=(pi/100)*k; X=x*(exp(-j*pi/100)).^(n'*k); y=exp(j*pi*n/4).*x; Y=y*(exp(-j*pi/100)).^(n'*k); subplot(2,2,1);plot(w/pi,abs(X)); xlabel('frequency');ylabel('|X|'

Wp=0.2*pi;Ws=0.3*pi;Rp=1;As=16; Ripple=10^(-Rp/20);Attn=10^(-As/20); %Analog filter design: [b,a]=afd_chb1(Wp,Ws,Rp,As) %Chebyshev-1 Filter Order=4 % Calculation of second-order sections: [C,B,A

% eg 1-6 n=0:50; x=3*cos(0.1*pi*n+pi/3); close all stem(n,x); title('余弦序列'); xlabel('n');ylabel('x(n)');

x=rand(1,11);n=0:10; k=0:500; w=(pi/500)*k; X=x*(exp(-j*pi/500)).^(n'*k); [y,m]=sigshift(x,n,2); Y=y*(exp(-j*pi/500)).^(m'*k); error=max(abs(Y-exp(-j*2*w).*X)); disp(error);