MDecorrelator Class Reference

noise decorrelation using side pulses More...

Inheritance diagram for MDecorrelator:

Classes
struct	ChannelInfo

Public Member Functions
void	Init (Diana::QEvent &ev)
	Init method. More...
void	Do (Diana::QEvent &ev, const Diana::QEventList &neighbours)
	Do method. More...
void	Done ()
	Done method. More...

Private Member Functions
const Diana::QVector &	GetNeighbourSamples (const int channel, const Diana::QEventList &neighbours)

Private Attributes
QChannelCovariance	fCovariance
std::map< int, ChannelInfo >	fDecorrelators
Diana::QVector	fEmpty
bool	fFirstCall
bool	fUseOF

Detailed Description

noise decorrelation using side pulses

Author

C. Mancini, M. Vignati

This module reduces the noise using the waveforms from side bolometers using a QChannelCovariance complex matrix as input. Side channels are accessed by this module through neighbours, so one needs side pulses unrolled and NeighbourAlgorithm = AllSideNeighbour in the reader. The subset of side channels to be used to decorrelate each channel have to be specified in the config file. If not all side(neighbour) pulses needed are found, the waveform is not decorrelated. The output waveform (decorrelated or not) is saved into a QPulse object named "Pulse" and the decorrelation status is saved into a QBool named "Decorrelated". See also the config $DIANA_INSTALL/cfg/noisedecorr/decorrelation.cfg, files must be preprocessed with preprocess.cfg in the same dir.

• Config example:

     module Decorrelator
     verbosity = info
     enable = true
     CovarianceInput = NO_DEFAULT
     SideChannelsInput = NO_DEFAULT
     UseOF = false
     SaveSamples = true
     endmod
     

• Parameters
  • CovarianceInput [string = NO_DEFAULT]: input source of the complex covariance matrix among bolometers. The matrix is the QChannelCovariance object computed by MNoiseCrossPowerSpectrum.
  • SideChannelsInput [string = NO_DEFAULT]: selection of side channels to be used to decorrelate a single channel. The object is a Diana::QStdVector<int> with label User@CorrelatedChannels_chanXXXX. "chan" is the channel to be decorrelated and the vector stores the side channels.
  • UseOF [bool = false]: use multidimensional optimum filter. Combines thermistors on same crystal (which must be sidepulses eachother) and channels in SideChannelsInput.
  • AveragePulseInput [string = NODEFAULT]: if UseOF = true users must specify the input source of average pulses;
  • SaveSamples [bool = true]: Save decorrelated samples onto output files
• Optional parameters
  • AveragePulseOwner [string = AveragePulses]: owner of average pulses
  • ConvertTomV [bool = false]: convert filtered samples from ADC to mV units.
  • RelativeChannelsInput [string = ]: if UseOF = true determines relative channels (thermistors on same crystal) from from user specified file with object Diana::QStdVector<int> with label User@RelativeChannels_chanXXX.
• Reads:
  • DAQ@Pulse (QPulse)
  • DAQ@PulseInfo (QPulseInfo)
  • DAQ@Header (QHeader)
• Writes
  • Pulse (QVector)
  • Decorrelated (QBool)
  • OFAmplitude (QDouble) - if parameter UseOF=true

Definition at line 66 of file MDecorrelator.hh.

Member Function Documentation

Do()

void MDecorrelator::Do	(	Diana::QEvent &	ev,
		const Diana::QEventList &	neighbours
	)

Do method.

Definition at line 41 of file MDecorrelator.cc.

References amp, ap, channel, QMultiChannelDecorrelator::Filter(), QEvent::Get(), QPulseInfo::GetChannelId(), QMultiChannelDecorrelator::GetChannels(), QMultiChannelDecorrelator::GetFilteredResolution(), QPulseInfo::GetIsNoise(), QPulseInfo::GetMasterSample(), QMultiChannelDecorrelator::GetOriginalResolution(), QSampleInfo::GetSampleIndex(), QMultiChannelDecorrelator::GetSideChannels(), maxpos, Q_DOUBLE_DEFAULT, Q_INT_DEFAULT, Q_STRING_DEFAULT, rHandle, QPulse::SetSamplesADC(), QMultiChannelDecorrelator::SetScale(), and QMultiChannelDecorrelator::SetSideChannels().

Done()

void MDecorrelator::Done

(

)

Done method.

Definition at line 208 of file MDecorrelator.cc.

GetNeighbourSamples()

const QVector & MDecorrelator::GetNeighbourSamples ( const int  channel, const Diana::QEventList &  neighbours  )

private

Definition at line 217 of file MDecorrelator.cc.

References channel, QPulseInfo::GetChannelId(), QPulse::GetSamples(), and QEventList::Size().

Init()

void MDecorrelator::Init

(

Diana::QEvent &

ev

)

Init method.

Definition at line 26 of file MDecorrelator.cc.

Member Data Documentation

fCovariance

QChannelCovariance MDecorrelator::fCovariance

private

Definition at line 86 of file MDecorrelator.hh.

fDecorrelators

std::map<int,ChannelInfo> MDecorrelator::fDecorrelators

private

Definition at line 87 of file MDecorrelator.hh.

fEmpty

Diana::QVector MDecorrelator::fEmpty

private

Definition at line 88 of file MDecorrelator.hh.

fFirstCall

bool MDecorrelator::fFirstCall

private

Definition at line 89 of file MDecorrelator.hh.

fUseOF

bool MDecorrelator::fUseOF

private

Definition at line 90 of file MDecorrelator.hh.

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The documentation for this class was generated from the following files:

• pkg/modfreqdecorrelator/MDecorrelator.hh
• pkg/modfreqdecorrelator/MDecorrelator.cc