private unsafe void Configure()
{
this._osc.SampleRate = this._sampleRate;
this._osc.Frequency = 57000.0;
int i;
for (i = 0; this._sampleRate >= (double)(20000 << i); i++)
{
}
this._decimationFactor = 1 << i;
this._demodulationSampleRate = this._sampleRate / (double)this._decimationFactor;
this._decimator = new DownConverter(this._demodulationSampleRate, this._decimationFactor);
float[] coefficients = FilterBuilder.MakeLowPassKernel(this._demodulationSampleRate, 200, 2500.0, WindowType.BlackmanHarris4);
this._baseBandFilter = new IQFirFilter(coefficients, 1);
this._pll->SampleRate = (float)this._demodulationSampleRate;
this._pll->DefaultFrequency = 0f;
this._pll->Range = 12f;
this._pll->Bandwidth = 1f;
this._pll->Zeta = 0.707f;
this._pll->LockTime = 0.5f;
this._pll->LockThreshold = 3.2f;
int length = (int)(this._demodulationSampleRate / 1187.5) | 1;
coefficients = FilterBuilder.MakeSin(this._demodulationSampleRate, 1187.5, length);
this._matchedFilter = new FirFilter(coefficients, 1);
this._syncFilter->Init(IirFilterType.BandPass, 1187.5, this._demodulationSampleRate, 500.0);
}
private unsafe void Configure()
{
this._osc->SampleRate = this._sampleRate;
this._osc->Frequency = 57000.0;
int i;
for (i = 0; this._sampleRate >= 20000.0 * Math.Pow(2.0, (double)i); i++)
{
}
this._decimator = new IQDecimator(i, this._sampleRate, true, false);
this._decimationFactor = (int)Math.Pow(2.0, (double)i);
this._demodulationSampleRate = this._sampleRate / (double)this._decimationFactor;
float[] coefficients = FilterBuilder.MakeLowPassKernel(this._demodulationSampleRate, 200, 2500.0, WindowType.BlackmanHarris4);
this._baseBandFilter.SetCoefficients(coefficients);
this._pll->SampleRate = (float)this._demodulationSampleRate;
this._pll->DefaultFrequency = 0f;
this._pll->Range = 12f;
this._pll->Bandwidth = 1f;
this._pll->Zeta = 0.707f;
this._pll->LockTime = 0.5f;
this._pll->LockThreshold = 3.2f;
int length = (int)(this._demodulationSampleRate / 1187.5) | 1;
coefficients = FilterBuilder.MakeSin(this._demodulationSampleRate, 1187.5, length);
this._matchedFilter.SetCoefficients(coefficients);
this._syncFilter->Init(IirFilterType.BandPass, 1187.5, this._demodulationSampleRate, 500);
}
private void Configure()
{
_osc->SampleRate = _sampleRate;
_osc->Frequency = PllDefaultFrequency;
var decimationStageCount = 0;
while (_sampleRate >= 20000 * Math.Pow(2.0, decimationStageCount))
{
decimationStageCount++;
}
_decimator = new IQDecimator(decimationStageCount, _sampleRate, true, false);
_decimationFactor = (int)Math.Pow(2.0, decimationStageCount);
_demodulationSampleRate = _sampleRate / _decimationFactor;
var coefficients = FilterBuilder.MakeLowPassKernel(_demodulationSampleRate, 200, 2500, WindowType.BlackmanHarris4);
_baseBandFilter.SetCoefficients(coefficients);
_pll->SampleRate = (float)_demodulationSampleRate;
_pll->DefaultFrequency = 0;
_pll->Range = PllRange;
_pll->Bandwidth = PllBandwith;
_pll->Zeta = PllZeta;
_pll->LockTime = PllLockTime;
_pll->LockThreshold = PllLockThreshold;
var matchedFilterLength = (int)(_demodulationSampleRate / RdsBitRate) | 1;
coefficients = FilterBuilder.MakeSin(_demodulationSampleRate, RdsBitRate, matchedFilterLength);
_matchedFilter.SetCoefficients(coefficients);
_syncFilter->Init(IirFilterType.BandPass, RdsBitRate, _demodulationSampleRate, 500);
}