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https://github.com/f4exb/sdrangel.git
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5d5b221e83
Add loop bandwidth and other PLL controls to Channel Analyzer GUI. Fix bug where PLL lock frequency would be incorrect by the decimation factor.
131 lines
4.7 KiB
C++
131 lines
4.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2019 Edouard Griffiths, F4EXB //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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// This program is distributed in the hope that it will be useful, //
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// but WITHOUT ANY WARRANTY; without even the implied warranty of //
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
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// GNU General Public License V3 for more details. //
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// //
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// You should have received a copy of the GNU General Public License //
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// along with this program. If not, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#ifndef INCLUDE_CHANALYZERSINK_H
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#define INCLUDE_CHANALYZERSINK_H
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#include "dsp/channelsamplesink.h"
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#include "dsp/interpolator.h"
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#include "dsp/decimatorc.h"
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#include "dsp/ncof.h"
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#include "dsp/fftcorr.h"
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#include "dsp/fftfilt.h"
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#include "dsp/phaselockcomplex.h"
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#include "dsp/freqlockcomplex.h"
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#include "dsp/costasloop.h"
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#include "audio/audiofifo.h"
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#include "util/movingaverage.h"
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#include "chanalyzersettings.h"
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class BasebandSampleSink;
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class ChannelAnalyzerSink : public ChannelSampleSink {
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public:
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ChannelAnalyzerSink();
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~ChannelAnalyzerSink();
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virtual void feed(const SampleVector::const_iterator& begin, const SampleVector::const_iterator& end);
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void applyChannelSettings(int channelSampleRate, int sinkSampleRate, int channelFrequencyOffset, bool force = false);
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void applySettings(const ChannelAnalyzerSettings& settings, bool force = false);
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double getMagSq() const { return m_magsq; }
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double getMagSqAvg() const { return (double) m_channelPowerAvg; }
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bool isPllLocked() const;
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Real getPllFrequency() const;
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Real getPllDeltaPhase() const;
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Real getPllPhase() const;
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void setSampleSink(BasebandSampleSink* sampleSink) { m_sampleSink = sampleSink; }
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static const unsigned int m_corrFFTLen;
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static const unsigned int m_ssbFftLen;
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private:
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int m_channelSampleRate;
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int m_channelFrequencyOffset;
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int m_sinkSampleRate;
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ChannelAnalyzerSettings m_settings;
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bool m_usb;
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double m_magsq;
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NCOF m_nco;
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Interpolator m_interpolator;
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Real m_interpolatorDistance;
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Real m_interpolatorDistanceRemain;
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PhaseLockComplex m_pll;
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FreqLockComplex m_fll;
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CostasLoop m_costasLoop;
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DecimatorC m_decimator;
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fftfilt* SSBFilter;
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fftfilt* DSBFilter;
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fftfilt* RRCFilter;
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fftcorr* m_corr;
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SampleVector m_sampleBuffer;
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MovingAverageUtil<double, double, 480> m_channelPowerAvg;
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BasebandSampleSink* m_sampleSink;
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void setFilters(int sampleRate, float bandwidth, float lowCutoff);
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void processOneSample(Complex& c, fftfilt::cmplx *sideband);
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int getActualSampleRate();
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void applySampleRate();
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inline void feedOneSample(const fftfilt::cmplx& s, const fftfilt::cmplx& pll)
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{
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switch (m_settings.m_inputType)
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{
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case ChannelAnalyzerSettings::InputPLL:
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{
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if (m_settings.m_ssb & !m_usb) { // invert spectrum for LSB
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m_sampleBuffer.push_back(Sample(pll.imag()*SDR_RX_SCALEF, pll.real()*SDR_RX_SCALEF));
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} else {
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m_sampleBuffer.push_back(Sample(pll.real()*SDR_RX_SCALEF, pll.imag()*SDR_RX_SCALEF));
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}
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}
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break;
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case ChannelAnalyzerSettings::InputAutoCorr:
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{
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std::complex<float> a = m_corr->run(s/SDR_RX_SCALEF, 0);
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if (m_settings.m_ssb & !m_usb) { // invert spectrum for LSB
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m_sampleBuffer.push_back(Sample(a.imag(), a.real()));
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} else {
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m_sampleBuffer.push_back(Sample(a.real(), a.imag()));
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}
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}
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break;
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case ChannelAnalyzerSettings::InputSignal:
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default:
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{
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if (m_settings.m_ssb & !m_usb) { // invert spectrum for LSB
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m_sampleBuffer.push_back(Sample(s.imag(), s.real()));
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} else {
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m_sampleBuffer.push_back(Sample(s.real(), s.imag()));
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}
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}
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break;
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}
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}
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};
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#endif // INCLUDE_CHANALYZERSINK_H
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