Cedric Roux
56c66c09aa
Pre-ci test passed git-svn-id: http://svn.eurecom.fr/openair4G/trunk@4000 818b1a75-f10b-46b9-bf7c-635c3b92a50f
73 lines
2.2 KiB
Matlab
Executable File
73 lines
2.2 KiB
Matlab
Executable File
function mat2wv(vfcSignal, sFilename, fSampleRate, bNormalize)
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% mat2wv(vfcSignal, sFilename, fSampleRate, bNormalize)
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% MAT2WV creates an SMU waveform file from a Matlab vector.
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%
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% Input parameters:
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% vfcSignal: Input data vector
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% sFilename: Filename of the generated waveform file
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% fSampleRate: Sample rate of the signal in Hz
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% bNormalize:
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% True: The signal is normalized by the max. magnitude
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% False: The signal is not normalized. The maximum magnitude
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% of the signal shall not exceed 1.0.
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% Copyright : Rohde & Schwarz GmbH & Co. KG, Munich, Germany
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% File version : \main\4 21 Jul 2008 16:20:08 ramian
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% Revision : V2.0
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% Date : 2008/08/18 12:03:56
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% Force row vector
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vfcSignal = vfcSignal(:).';
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% Number of samples
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iNOfSamples = length(vfcSignal);
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% Normalize signal
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if bNormalize
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fprintf('Normalize signal\n');
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vfcSignal = vfcSignal / max(abs(vfcSignal));
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% Remark:
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% We do not normalize to max RE/IM to allow arbitrary phase offsets
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% or frequency shifts without overflow
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vfcSignal = vfcSignal / max(abs(vfcSignal));
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% Calculate the peak value
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fPeakPower = max(abs(vfcSignal).^2);
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fPeakPowerdBfs = -10*log10(fPeakPower);
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% Calculate the RMS value
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fMeanPower = mean(abs(vfcSignal).^2);
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fRMSdBfs = -10*log10(fMeanPower);
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else
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% Do not normalize the signal
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fPeakPowerdBfs = 0;
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fRMSdBfs = 0;
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end
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% Quantization to 16 bit
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iMaxInt = 32767;
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vicData = vfcSignal*iMaxInt;
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clear vfcSignal;
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viDataInterleaved = reshape([real(vicData);imag(vicData)],1,2*iNOfSamples);
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clear vicData;
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viDataInterleaved = int16(viDataInterleaved);
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% Write waveform file
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fid = fopen(sFilename,'w');
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fprintf(fid,'%s','{TYPE: SMU-WV,0}');
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fprintf(fid,'%s','{COMMENT: Generated by mat2wv.m}');
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fprintf(fid,'%s',['{DATE: ' datestr(now,'yyyy-mm-dd;HH:MM:SS') '}']);
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fprintf(fid,'%s',['{LEVEL OFFS: ' num2str(fRMSdBfs) ', ' num2str(fPeakPowerdBfs) '}']);
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fprintf(fid,'%s',['{CLOCK: ' num2str(fSampleRate) '}']);
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fprintf(fid,'%s',['{SAMPLES: ' num2str(iNOfSamples) '}']);
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fprintf(fid,'%s',['{WAVEFORM-' num2str(4*iNOfSamples+1) ':#']);
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fwrite(fid,viDataInterleaved,'int16');
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fprintf(fid,'%s','}');
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fclose(fid);
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