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62 lines
2.7 KiB
C++
62 lines
2.7 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2018 F4EXB //
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// written by Edouard Griffiths //
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// //
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// See: http://liquidsdr.org/blog/pll-howto/ //
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// Fixed filter registers saturation //
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// Added order for PSK locking. This brilliant idea actually comes from this //
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// post: https://www.dsprelated.com/showthread/comp.dsp/36356-1.php //
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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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// //
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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 SDRBASE_DSP_FREQLOCKCOMPLEX_H_
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#define SDRBASE_DSP_FREQLOCKCOMPLEX_H_
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#include "dsp/dsptypes.h"
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#include "export.h"
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/** General purpose Phase-locked loop using complex analytic signal input. */
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class SDRBASE_API FreqLockComplex
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{
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public:
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FreqLockComplex();
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~FreqLockComplex();
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void reset();
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void setSampleRate(unsigned int sampleRate);
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/** Feed PLL with a new signa sample */
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void feed(float re, float im);
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const std::complex<float>& getComplex() const { return m_y; }
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float getReal() const { return m_yRe; }
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float getImag() const { return m_yIm; }
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private:
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/** Normalize angle in radians into the [-pi,+pi] region */
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static float normalizeAngle(float angle);
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float m_a0;
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float m_a1;
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std::complex<float> m_y;
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float m_yRe;
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float m_yIm;
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float m_freq;
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float m_phi;
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float m_phiX0;
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float m_phiX1;
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float m_y1;
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};
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#endif /* SDRBASE_DSP_FREQLOCKCOMPLEX_H_ */
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