代码搜索结果

n=[-5:5]; x=(-0.9).^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'); subplot(2,1,

n=[-5:5]; x=(-0.9).^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'); subplot(2,1,

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

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

function [db,mag,pha,grd,w]=freqz_m(b,a); [H,w]=freqz(b,a,1000,'whole'); H=(H(1:1:501))';w=(w(1:1:501))'; mag=abs(H); db=20*log10((mag+eps)/max(mag)); pha=angle(H); grd=grpdelay(b,a,w); subplot

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|'

%----------------------------------------------------------------------------- % example6_19 % to test butter.m %----------------------------------------------------------------------------- clea

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)');

n=[-1:3]; x=1:5; k=0:500;w=(pi/500)*k; X=x*exp(-j*pi/500.*(n'*k)); magX=abs(X);angX=angle(X); realX=real(X);imagX=imag(X); subplot(2,2,1);plot(w/pi,magX);grid; xlabel('Frequency');ylabel('ampli