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- added frequency offset

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git-svn-id: http://moon:8086/svn/matlab/trunk@24 801c6759-fa7c-4059-a304-17956f83a07c
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jens
2015-04-05 12:02:19 +00:00
parent 2063f0ec37
commit 81650fd21b
1 changed files with 3 additions and 2 deletions
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ofdm/fdet_wav.m
+3 -2
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@@ -1,4 +1,4 @@
function fdet_wav(filename, p) function fdet_wav(filename, foff, p)
% %
% Example: fdet_wav('drm-15435-if.wav', [900 1000 10]) % Example: fdet_wav('drm-15435-if.wav', [900 1000 10])
% Example: ofdm_tx(40, 1) % Example: ofdm_tx(40, 1)
@@ -28,6 +28,7 @@ else
x = xwav.*exp(-j*(2*pi*fc/fs*(0:len-1)')); x = xwav.*exp(-j*(2*pi*fc/fs*(0:len-1)'));
end end
x = x.*exp(j*(2*pi*foff/fs*(0:len-1)'));
[omega, err, dmod, omega_coarse, omega_est] = fdet(x, N, Ng, omega_min, omega_step, omega_max); [omega, err, dmod, omega_coarse, omega_est] = fdet(x, N, Ng, omega_min, omega_step, omega_max);
f_coarse = omega_coarse*fs f_coarse = omega_coarse*fs
@@ -44,4 +45,4 @@ subplot(4,1,3)
plot(1:lge(omega), omega*fs); grid; legend('f'); plot(1:lge(omega), omega*fs); grid; legend('f');
subplot(4,1,4) subplot(4,1,4)
plot(1:lge(omega), angle(dmod), '-*', 1:lge(omega), diff(angle([0 dmod])), 'r-*'); grid; legend('phi', 'dphi'); plot(1:lge(omega), angle(dmod), '-', 1:lge(omega), diff(angle([0 dmod])), 'r-'); grid; legend('phi', 'dphi');