代码搜索结果

subplot(1,1,1) 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 axis([-2,

w = [0:1:500]*pi/500; % [0, pi] axis divided into 501 points. X = exp(j*w) ./ (exp(j*w) - 0.9*ones(1,501)); magX = abs(X); angX = angle(X); subplot(2,1,1); plot(w/pi,magX); grid; axis([0,1,0,10])

n = 0:100; x = cos(pi*n/2); k = -100:100; w = (pi/100)*k; % frequency between -pi and +pi X = x * (exp(-j*pi/100)).^(n'*k); % DTFT of x % y = exp(j*pi*n/4).*x; % signal mu

w = [-100:100]*pi/100; % frequency between -pi and +pi N = 5; X1 = sin((w+eps)*N/2)./sin((w+eps)/2); N = 15; X2 = sin((w+eps)*N/2)./sin((w+eps)/2); N = 25; X3 = sin((w+eps)*N/2)./sin((w+eps)/2);

w = [0:1:500]*pi/500; % [0, pi] axis divided into 501 points. 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(

% Chapter 3: Example 3.4: % DTFT of finite duration seq using mat-vec operation % n = -1:3; x = 1:5; % sequence x(n) k = 0:500; w = (pi/500)*k; % [0, pi] axis divided in

subplot(1,1,1) 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 axis([-2,2,0,15]) x

n = -5:10; x = rand(1,length(n)) + j*rand(1,length(n)); k = -100:100; w = (pi/100)*k; % frequency between -pi and +pi X = x * (exp(-j*pi/100)).^(n'*k); % DTFT of x % conjugation property

% Chapter 05: Example 05.08: HiRes Spectrum % % High resolution spectrum based on 100 samples of the signal x(n) subplot(1,1,1) n=[0:1:99]; x=cos(0.48*pi*n)+cos(0.52*pi*n); subplot(2,1,1);stem(n

% Chapter 05: Example 05.06: Simple DFT Example % x = [1,1,1,1]; subplot(1,1,1); % % a) DTFT w = [0:1:500]*2*pi/500; [H] = freqz(x,1,w); magH = abs(H); phaH = angle(H); phaH(126)=-47.5841*pi/1