jens
0fd40e13b2
git-svn-id: http://moon:8086/svn/matlab/trunk@8 801c6759-fa7c-4059-a304-17956f83a07c
27 lines
661 B
Matlab
27 lines
661 B
Matlab
function ofdm_rx(x)
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close all;
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CP_SIZE = 256;
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FFT_SIZE = 1024;
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fa = 48000;
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fo = 0.0;
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k_fft = 2*sqrt(FFT_SIZE);
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% Introduce frequency offset
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x = 0.5*exp(i*2*pi.*(0:length(x)-1)*fo/fa)' .* x;
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figure;
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Ns = (CP_SIZE + FFT_SIZE);
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Nf = length(x)/Ns;
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for k=1:Nf
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Xs = fft(x((k-1)*Ns+CP_SIZE+1:(k-1)*Ns+CP_SIZE+FFT_SIZE), FFT_SIZE)/k_fft;
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mag = abs(Xs(1:FFT_SIZE/8));
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phase = angle(Xs(1:FFT_SIZE/8));
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subplot(2, 1, 1)
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plot(fa*(0:lge(mag)-1)/FFT_SIZE, mag, '-*'); grid;
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subplot(2, 1, 2)
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plot(fa*(0:lge(phase)-1)/FFT_SIZE, phase, '-*'); axis([0, fa*(lge(phase)-1)/FFT_SIZE, -pi, +pi]);grid;
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pause (0.001);
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end
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