Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
34 lines
774 B
Matlab
Executable File
34 lines
774 B
Matlab
Executable File
function retvalue=variouspowers(s)
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W=25;
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fftsize=2^ceil(log2(length(s)));
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powspectrum=fftshift(abs(fft(s-mean(s),fftsize)/sqrt(fftsize)));
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powspectrumfilt=conv(powspectrum,ones(1,2*W+1));
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[sigpower carrier_idx]=max(powspectrumfilt);
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if (carrier_idx<=3*W)
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carrier_idx=3*W+1;
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end
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sigpower_dB=20*log10(sigpower);
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if (carrier_idx>3*W)
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noiseplusintfspectrum=powspectrum;
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noiseplusintfspectrum(carrier_idx+(-W:W)-2*W)=zeros(1,2*W+1);
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noiseplusintfpower_dB=10*log10(sum(noiseplusintfspectrum.^2));
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noiseplusintfspectrum_dB=20*log10(noiseplusintfspectrum);
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noiseplusintfspectrum_dB(carrier_idx+(-W:W)-2*W)=-20;
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%plot([ 20*log10(powspectrum) noiseplusintfspectrum_dB])
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%pause
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retvalue=[sigpower_dB noiseplusintfpower_dB];
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else
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retvalue=[sigpower_dB +Inf];
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end
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