java.lang.Object
likelihoodDetectionModule.thresholdDetector.Threshold

public class Threshold extends Object
This class performs the actual max likelihood detector logic. There is one per SignalBand. Basically, it checks that the SNR is above the inBandThreshold (this comparison is done in linear units, even though thresholds are specified in dB). Next, a secondary test is performed. The signal estimate in each associated GuardBand (if any were specified) is taken, and averaged. If this average level is greater than the guardBandThreshold, a detection is initiated. The detection remains active for as long as these two tests pass. When a detection begins, the startDetection() method of DetectionFilter is called, and an updateDetection() is immediately called with the data of the first data point. Any subsequent data points are passed to the DetectionFilter by calling its updateDetection() method. Finally when the detetction finished, the DetectionFilter's endDetction() method is called.
Author:
Dave Flogeras
  • Constructor Details

    • Threshold

      public Threshold(DetectionFilter detectionFilter, int signalBandIndex, SignalBand signalBand, Map<Integer,GuardBand> guardBands)
      Constructor.
      Parameters:
      detectionFilter - The post detection filter to use.
      signalBandIndex - The index (within the data blocks) of the signal band of interest for this threshold
      signalBand - The SignalBand object defining this thresholds band of interest
      guardBands - The mapping of indices (into the data blocks) and respective guardBands associated with the signalBand. This may be an empty list or null if there are no associated guardBands.