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Results tagged with ifft
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user 50567
2
votes
Accepted
computing convolution via zero, Periodic padding and FFT - confused about pad length and inf...
I did it here for illustration.
hp = circshift([h;zeros(R-(N+K-1),1)],-(N-1)); % Eq. (3)
% Compute convolution
vp = ifft(fft(gp,R). …
- 589
2
votes
Accepted
How to perform the OFDM frequency-domain oversampling in time domain
The MATLAB code below shows how to do time-domain interpolation
N = 5;
u = 2;
x = rand(N,1);
% Zero-padding in frequency domain
xpad = [x(1:(N+1)/2);zeros((u-1)*N,1);x((N+1)/2+1:end)];
xi_freq = ifft … (xpad);
% Interpolation in time domain
% Dirichlet kernel
dsinc = diric(2*pi*(0:u*N-1)/(u*N),N)/u;
% Circular convolution
xi_time = cconv(upsample(ifft(x),u),dsinc,u*N);
fprintf("L-inf of error = %.2e …
- 589