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Diffstat (limited to 'gr-digital/lib/mpsk_receiver_cc_impl.h')
| -rw-r--r-- | gr-digital/lib/mpsk_receiver_cc_impl.h | 242 |
1 files changed, 0 insertions, 242 deletions
diff --git a/gr-digital/lib/mpsk_receiver_cc_impl.h b/gr-digital/lib/mpsk_receiver_cc_impl.h deleted file mode 100644 index 48a9e43e58..0000000000 --- a/gr-digital/lib/mpsk_receiver_cc_impl.h +++ /dev/null @@ -1,242 +0,0 @@ -/* -*- c++ -*- */ -/* - * Copyright 2004,2007,2011,2012 Free Software Foundation, Inc. - * - * This file is part of GNU Radio - * - * GNU Radio is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 3, or (at your option) - * any later version. - * - * GNU Radio is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with GNU Radio; see the file COPYING. If not, write to - * the Free Software Foundation, Inc., 51 Franklin Street, - * Boston, MA 02110-1301, USA. - */ - -#ifndef INCLUDED_DIGITAL_MPSK_RECEIVER_CC_IMPL_H -#define INCLUDED_DIGITAL_MPSK_RECEIVER_CC_IMPL_H - -#include <gnuradio/digital/mpsk_receiver_cc.h> -#include <gnuradio/attributes.h> -#include <gnuradio/gr_complex.h> -#include <fstream> -#include <gnuradio/filter/mmse_fir_interpolator_cc.h> - -namespace gr { - namespace digital { - - class mpsk_receiver_cc_impl : public mpsk_receiver_cc - { - public: - mpsk_receiver_cc_impl(unsigned int M, float theta, - float loop_bw, - float fmin, float fmax, - float mu, float gain_mu, - float omega, float gain_omega, float omega_rel); - ~mpsk_receiver_cc_impl(); - - void forecast(int noutput_items, gr_vector_int &ninput_items_required); - int general_work(int noutput_items, - gr_vector_int &ninput_items, - gr_vector_const_void_star &input_items, - gr_vector_void_star &output_items); - - //! Returns the modulation order (M) currently set - float modulation_order() const { return d_M; } - - //! Returns current value of theta - float theta() const { return d_theta; } - - //! Returns current value of mu - float mu() const { return d_mu; } - - //! Returns current value of omega - float omega() const { return d_omega; } - - //! Returns mu gain factor - float gain_mu() const { return d_gain_mu; } - - //! Returns omega gain factor - float gain_omega() const { return d_gain_omega; } - - //! Returns the relative omega limit - float gain_omega_rel() const {return d_omega_rel; } - - //! Sets the modulation order (M) currently - void set_modulation_order(unsigned int M); - - //! Sets value of theta - void set_theta(float theta) { d_theta = theta; } - - //! Sets value of mu - void set_mu(float mu) { d_mu = mu; } - - //! Sets value of omega and its min and max values - void set_omega(float omega) { - d_omega = omega; - d_min_omega = omega*(1.0 - d_omega_rel); - d_max_omega = omega*(1.0 + d_omega_rel); - d_omega_mid = 0.5*(d_min_omega+d_max_omega); - } - - //! Sets value for mu gain factor - void set_gain_mu(float gain_mu) { d_gain_mu = gain_mu; } - - //! Sets value for omega gain factor - void set_gain_omega(float gain_omega) { d_gain_omega = gain_omega; } - - //! Sets the relative omega limit and resets omega min/max values - void set_gain_omega_rel(float omega_rel); - - protected: - void make_constellation(); - void mm_sampler(const gr_complex symbol); - void mm_error_tracking(gr_complex sample); - void phase_error_tracking(gr_complex sample); - - /*! - * \brief Phase error detector for MPSK modulations. - * - * \param sample the I&Q sample from which to determine the phase error - * - * This function determines the phase error for any MPSK signal - * by creating a set of PSK constellation points and doing a - * brute-force search to see which point minimizes the Euclidean - * distance. This point is then used to derotate the sample to - * the real-axis and a atan (using the fast approximation - * function) to determine the phase difference between the - * incoming sample and the real constellation point - * - * This should be cleaned up and made more efficient. - * - * \returns the approximated phase error. - */ - float phase_error_detector_generic(gr_complex sample) const; - - /*! - * \brief Phase error detector for BPSK modulation. - * - * \param sample the I&Q sample from which to determine the phase error - * - * This function determines the phase error using a simple BPSK - * phase error detector by multiplying the real and imaginary (the - * error signal) components together. As the imaginary part goes to - * 0, so does this error. - * - * \returns the approximated phase error. - */ - float phase_error_detector_bpsk(gr_complex sample) const; - - /*! - * \brief Phase error detector for QPSK modulation. - * - * \param sample the I&Q sample from which to determine the phase error - * - * This function determines the phase error using the limiter - * approach in a standard 4th order Costas loop - * - * \returns the approximated phase error. - */ - float phase_error_detector_qpsk(gr_complex sample) const; - - /*! - * \brief Decision maker for a generic MPSK constellation. - * - * \param sample the baseband I&Q sample from which to make the decision - * - * This decision maker is a generic implementation that does a - * brute-force search for the constellation point that minimizes - * the error between it and the incoming signal. - * - * \returns the index to d_constellation that minimizes the error/ - */ - unsigned int decision_generic(gr_complex sample) const; - - /*! - * \brief Decision maker for BPSK constellation. - * - * \param sample the baseband I&Q sample from which to make the decision - * - * This decision maker is a simple slicer function that makes a - * decision on the symbol based on its placement on the real - * axis of greater than 0 or less than 0; the quadrature - * component is always 0. - * - * \returns the index to d_constellation that minimizes the error/ - */ - unsigned int decision_bpsk(gr_complex sample) const; - - /*! - * \brief Decision maker for QPSK constellation. - * - * \param sample the baseband I&Q sample from which to make the decision - * - * This decision maker is a simple slicer function that makes a - * decision on the symbol based on its placement versus both - * axes and returns which quadrant the symbol is in. - * - * \returns the index to d_constellation that minimizes the error/ - */ - unsigned int decision_qpsk(gr_complex sample) const; - - private: - unsigned int d_M; - float d_theta; - - /*! - * \brief Decision maker function pointer - * - * \param sample the baseband I&Q sample from which to make the decision - * - * This is a function pointer that is set in the constructor to - * point to the proper decision function for the specified - * constellation order. - * - * \return index into d_constellation point that is the closest to the recieved sample - */ - unsigned int (mpsk_receiver_cc_impl::*d_decision)(gr_complex sample) const; - - std::vector<gr_complex> d_constellation; - unsigned int d_current_const_point; - - // Members related to symbol timing - float d_mu, d_gain_mu; - float d_omega, d_gain_omega, d_omega_rel, d_max_omega, d_min_omega, d_omega_mid; - gr_complex d_p_2T, d_p_1T, d_p_0T; - gr_complex d_c_2T, d_c_1T, d_c_0T; - - /*! - * \brief Phase error detector function pointer - * - * \param sample the I&Q sample from which to determine the phase error - * - * This is a function pointer that is set in the constructor to - * point to the proper phase error detector function for the - * specified constellation order. - */ - float (mpsk_receiver_cc_impl::*d_phase_error_detector)(gr_complex sample) const; - - //! get interpolated value - gr::filter::mmse_fir_interpolator_cc *d_interp; - - //! delay line length. - static const unsigned int DLLEN = 8; - - //! delay line plus some length for overflow protection - __GR_ATTR_ALIGNED(8) gr_complex d_dl[2*DLLEN]; - - //! index to delay line - unsigned int d_dl_idx; - }; - - } /* namespace digital */ -} /* namespace gr */ - -#endif /* INCLUDED_DIGITAL_MPSK_RECEIVER_CC_IMPL_H */ |