public DemodulatedBlock DemodulateBlock(Block b, DemodulationConfig config)
{
// *** copy across the metadata ***
DemodulatedBlock db = new DemodulatedBlock();
db.TimeStamp = b.TimeStamp;
db.Config = b.Config;
db.DemodulationConfig = config;
// *** extract the gated detector data using the given config ***
List<GatedDetectorData> gatedDetectorData = new List<GatedDetectorData>();
int ind = 0;
foreach (string d in b.detectors)
{
GatedDetectorExtractSpec gdes;
config.GatedDetectorExtractSpecs.TryGetValue(d, out gdes);
if (gdes != null)
{
gatedDetectorData.Add(GatedDetectorData.ExtractFromBlock(b, gdes));
db.DetectorIndices.Add(gdes.Name, ind);
ind++;
db.DetectorCalibrations.Add(gdes.Name,
((TOF)((EDMPoint)b.Points[0]).Shot.TOFs[gdes.Index]).Calibration);
}
}
//foreach (KeyValuePair<string, GatedDetectorExtractSpec> spec in config.GatedDetectorExtractSpecs)
//{
// GatedDetectorExtractSpec gate = spec.Value;
// gatedDetectorData.Add(GatedDetectorData.ExtractFromBlock(b, gate));
// db.DetectorIndices.Add(gate.Name, ind);
// ind++;
// db.DetectorCalibrations.Add(gate.Name,
// ((TOF)((EDMPoint)b.Points[0]).Shot.TOFs[gate.Index]).Calibration);
//}
// ** normalise the top detector **
gatedDetectorData.Add(
gatedDetectorData[db.DetectorIndices["top"]] / gatedDetectorData[db.DetectorIndices["norm"]]);
db.DetectorIndices.Add("topNormed", db.DetectorIndices.Count);
// *** extract the point detector data ***
List<PointDetectorData> pointDetectorData = new List<PointDetectorData>();
foreach (string channel in config.PointDetectorChannels)
{
pointDetectorData.Add(PointDetectorData.ExtractFromBlock(b, channel));
// for the moment all single point detector channels are set to have a calibration
// of 1.0 .
db.DetectorCalibrations.Add(channel, 1.0);
}
// *** build the list of detector data ***
List<DetectorData> detectorData = new List<DetectorData>();
for (int i = 0; i < gatedDetectorData.Count; i++) detectorData.Add(gatedDetectorData[i]);
for (int i = 0; i < config.PointDetectorChannels.Count; i++)
{
detectorData.Add(pointDetectorData[i]);
db.DetectorIndices.Add(config.PointDetectorChannels[i], i + gatedDetectorData.Count);
}
// calculate the norm FFT
db.NormFourier = DetectorFT.MakeFT(gatedDetectorData[db.DetectorIndices["norm"]], kFourierAverage);
// *** demodulate channels ***
// ** build the list of modulations **
List<string> modNames = new List<string>();
List<Waveform> modWaveforms = new List<Waveform>();
foreach (AnalogModulation mod in b.Config.AnalogModulations)
{
modNames.Add(mod.Name);
modWaveforms.Add(mod.Waveform);
}
foreach (DigitalModulation mod in b.Config.DigitalModulations)
{
modNames.Add(mod.Name);
modWaveforms.Add(mod.Waveform);
}
foreach (TimingModulation mod in b.Config.TimingModulations)
{
modNames.Add(mod.Name);
modWaveforms.Add(mod.Waveform);
}
// ** work out the switch state for each point **
int blockLength = modWaveforms[0].Length;
List<bool[]> wfBits = new List<bool[]>();
foreach (Waveform wf in modWaveforms) wfBits.Add(wf.Bits);
List<uint> switchStates = new List<uint>(blockLength);
for (int i = 0; i < blockLength; i++)
{
uint switchState = 0;
for (int j = 0; j < wfBits.Count; j++)
{
if (wfBits[j][i]) switchState += (uint)Math.Pow(2, j);
}
switchStates.Add(switchState);
}
// pre-calculate the state signs for each analysis channel
// the first index selects the analysis channel, the second the switchState
int numStates = (int)Math.Pow(2, modWaveforms.Count);
int[,] stateSigns = new int[numStates, numStates];
for (uint i = 0; i < numStates; i++)
{
for (uint j = 0; j < numStates; j++)
{
stateSigns[i, j] = stateSign(j, i);
}
}
// ** the following needs to be done for each detector **
for (int detector = 0; detector < detectorData.Count; detector++)
{
DetectorChannelValues dcv = new DetectorChannelValues();
for (int i = 0; i < modNames.Count; i++) dcv.SwitchMasks.Add(modNames[i], (uint)(1 << i));
// * divide the data up into bins according to switch state *
List<List<double>> statePoints = new List<List<double>>(numStates);
for (int i = 0; i < numStates; i++) statePoints.Add(new List<double>(blockLength / numStates));
for (int i = 0; i < blockLength; i++)
{
statePoints[(int)switchStates[i]].Add(detectorData[detector].PointValues[i]);
}
// * calculate the channel values *
int subLength = blockLength / numStates;
double[,] channelValues = new double[numStates, subLength];
for (int channel = 0; channel < numStates; channel++)
{
for (int subIndex = 0; subIndex < subLength; subIndex++)
{
double chanVal = 0;
for (int i = 0; i < numStates; i++) chanVal +=
stateSigns[channel, i] * statePoints[i][subIndex];
chanVal /= (double)numStates;
channelValues[channel, subIndex] = chanVal;
}
}
//* calculate the channel means *
double[] channelMeans = new double[numStates];
for (int channel = 0; channel < numStates; channel++)
{
double total = 0;
for (int i = 0; i < subLength; i++) total += channelValues[channel, i];
total /= blockLength / numStates;
channelMeans[channel] = total;
}
dcv.Values = channelMeans;
//* calculate the channel errors *
double[] channelErrors = new double[numStates];
for (int channel = 0; channel < numStates; channel++)
{
double total = 0;
for (int i = 0; i < subLength; i++)
total += Math.Pow(channelValues[channel, i] - channelMeans[channel], 2);
total /= subLength * (subLength - 1);
total = Math.Sqrt(total);
channelErrors[channel] = total;
}
dcv.Errors = channelErrors;
db.ChannelValues.Add(dcv);
}
return db;
}
