Hi, everyone! I'm trying to use demod11 for offline test and the protocol I use is protocol 802.11a. But I have some questions.
First, as I comprehend, TestMod11A reads one frame from input file, implenments OFDM modulation and then writes the modulated symbols to output file (***.tx). ConvertModFile2DumpFile converts tx file to rx signal file (***.dmp). If this rx
signal file is obtained, I can call CsFrameDemod to demodulate the original data. Here, I have a question. If I reads several frames from input file, OFDM-modulate them and writes to output file, and then I convert the file to rx signal file,
can I simply call CsFrameDemod to demodulated all these frames? I wonder after PrepareSigStream is called, BB11ARxFrameDemod will separate these frames or not.
Second, I have no idea what the segment codes below performs.
// Possible the scan pointer wraps to the buffer header
dReq = buffer_span(pbSPTemp, SoraRadioGetRxStreamPos(&RxStream), SoraRadioGetRxStreamSize(&RxStream)) * 28.0 / 40;
dCost = TimerRead(&ti) * 1000;
dRatio = dCost / dReq;
printf("[noise] req: %9.3fus cost: %9.3fus \n", dReq, dCost);
iNoiseCounter++;
dNoiseAverage += dRatio;
dNosieSD += dRatio * dRatio;
dNoiseMax = (dNoiseMax >= dRatio)?dNoiseMax : dRatio;
if (dRatio >= 0.8)
{
dNoiseAbove0_8Counter++;
if (dRatio >= 1.0)
{
dNoiseAboveCounter++;
}
}
Waiting for your answer. Thanks.
