Function scanDirection

TransceiverRAD1/PowerScanner.cpp:105–160

}

int scanDirection(RAD1Device *rad, TIMESTAMP &timestamp, GSM::GSMBand band, int startARFCN, int stopARFCN,
    FrequencyConverter arfcnToFreqKHz, SpectrumMap::LinkDirection linkDir, SpectrumMap &spectrumMap)
{
  list<ARFCNVector> results;
  float integrationTime = ((float)gConfig.getNum("PowerScanner.IntegrationTime"))/1000.0F;

  float startFreq = arfcnToFreqKHz(band, startARFCN) * 1000.0F;
  rad->setRxFreq(startFreq);

  rad->updateAlignment(40000);
  rad->updateAlignment(41000);

  rad->setRxGain(gConfig.getNum("PowerScanner.RxGain"));

  for (unsigned ARFCN=startARFCN; ARFCN <= stopARFCN; ARFCN++) {
    float currFreq = arfcnToFreqKHz(band, ARFCN) * 1000.0F;
    double sum = 0.0;
    double num = 0.0;
    rad->setRxFreq(currFreq);

    while (num < integrationTime*270833.33) {
      short readBuf[512*2];
      bool underrun;
      int rd = rad->readSamples(readBuf,512,&underrun,timestamp);
      if (rd) {
	for (int i = 0; i < rd; i++) {
	  uint32_t *wordPtr = (uint32_t *) &readBuf[2*i];
	  *wordPtr = usrp_to_host_u32(*wordPtr);
	  sum += (readBuf[2*i+1]*readBuf[2*i+1] + readBuf[2*i]*readBuf[2*i]);
	  num += 1.0;
	}
      }
      timestamp += rd;
    }

    double currPower = sum/num;
	// HACK
    printf("At freq %f (ARFCN %5d), the average power is %10.2f\n",currFreq,ARFCN,currPower);
    ARFCNVector res(currPower,ARFCN, currFreq, linkDir);
    results.push_back(res);
  }

  for (list<ARFCNVector>::iterator rp=results.begin(); rp!=results.end(); ++rp) {
    double currPower = rp->power();
    unsigned ARFCN = rp->ARFCN();
    float freq = rp->frequency();
    SpectrumMap::LinkDirection linkDir = rp->linkDirection();

    if (currPower==0.0) continue;

    double dBm = 10.0F*log10(currPower) + gConfig.getNum("PowerScanner.dBmOffset");
    spectrumMap.power(band,ARFCN,freq,linkDir,dBm);
  }

  return 0;
}

ConfigurationKeyMap getAllConfigurationKeys()