diff options
| author | Thomas Tsou <tom@tsou.cc> | 2013-08-20 21:17:19 -0400 |
|---|---|---|
| committer | Thomas Tsou <tom@tsou.cc> | 2013-10-18 13:10:17 -0400 |
| commit | 8181b0104acd78f8e4a1ddb6df105cab24bba4c1 (patch) | |
| tree | 37bd022dc8e8278f08087b3e9fd6dfb1181744fb /Transceiver52M/Transceiver.cpp | |
| parent | 9471d7635abeb9b5c87227d64e452890da0e65bd (diff) | |
Transceiver52M: Disable energy detector
The adaptive energy threshold gating suffers a near-far problem
at certain gain levels. This is due to exponential threshold
raising, but linear decreases. A large signal level followed by
a period low signal level causes (comparatively) weak signals to
go undetected. Additionally, the algorithm performs differently
at multiple RF gain levels.
This patch switches solely to correlation based gating for burst
detection. The main computational load with this approach is
sub-sample width peak interpolation, which we disable for intial
detection and run after threshold passing.
Signed-off-by: Thomas Tsou <tom@tsou.cc>
Diffstat (limited to 'Transceiver52M/Transceiver.cpp')
| -rw-r--r-- | Transceiver52M/Transceiver.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/Transceiver52M/Transceiver.cpp b/Transceiver52M/Transceiver.cpp index f09f036..ad048ee 100644 --- a/Transceiver52M/Transceiver.cpp +++ b/Transceiver52M/Transceiver.cpp @@ -327,6 +327,7 @@ SoftVector *Transceiver::pullRadioVector(GSM::Time &wTime, complex amplitude = 0.0; float TOA = 0.0; float avgPwr = 0.0; +#ifdef ENERGY_DETECT if (!energyDetect(*vectorBurst, 20 * mSPS, mEnergyThreshold, &avgPwr)) { LOG(DEBUG) << "Estimated Energy: " << sqrt(avgPwr) << ", at time " << rxBurst->getTime(); double framesElapsed = rxBurst->getTime()-prevFalseDetectionTime; @@ -341,7 +342,7 @@ SoftVector *Transceiver::pullRadioVector(GSM::Time &wTime, return NULL; } LOG(DEBUG) << "Estimated Energy: " << sqrt(avgPwr) << ", at time " << rxBurst->getTime(); - +#endif // run the proper correlator bool success = false; if (corrType==TSC) { |