diff options
Diffstat (limited to 'gr-digital/include/gnuradio/digital/mpsk_receiver_cc.h')
| -rw-r--r-- | gr-digital/include/gnuradio/digital/mpsk_receiver_cc.h | 148 |
1 files changed, 0 insertions, 148 deletions
diff --git a/gr-digital/include/gnuradio/digital/mpsk_receiver_cc.h b/gr-digital/include/gnuradio/digital/mpsk_receiver_cc.h deleted file mode 100644 index 0cb1a8ba7b..0000000000 --- a/gr-digital/include/gnuradio/digital/mpsk_receiver_cc.h +++ /dev/null @@ -1,148 +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_H -#define INCLUDED_DIGITAL_MPSK_RECEIVER_CC_H - -#include <gnuradio/digital/api.h> -#include <gnuradio/block.h> -#include <gnuradio/blocks/control_loop.h> - -namespace gr { - namespace digital { - - /*! - * \brief This block takes care of receiving M-PSK modulated - * signals through phase, frequency, and symbol synchronization. - * \ingroup synchronizers_blk - * \ingroup deprecated_blk - * - * \details - * It performs carrier frequency and phase locking as well as - * symbol timing recovery. It works with (D)BPSK, (D)QPSK, and - * (D)8PSK as tested currently. It should also work for OQPSK and - * PI/4 DQPSK. - * - * The phase and frequency synchronization are based on a Costas - * loop that finds the error of the incoming signal point compared - * to its nearest constellation point. The frequency and phase of - * the NCO are updated according to this error. There are - * optimized phase error detectors for BPSK and QPSK, but 8PSK is - * done using a brute-force computation of the constellation - * points to find the minimum. - * - * The symbol synchronization is done using a modified Mueller and - * Muller circuit from the paper: - * - * "G. R. Danesfahani, T. G. Jeans, "Optimisation of modified Mueller - * and Muller algorithm," Electronics Letters, Vol. 31, no. 13, 22 - * June 1995, pp. 1032 - 1033." - * - * This circuit interpolates the downconverted sample (using the - * NCO developed by the Costas loop) every mu samples, then it - * finds the sampling error based on this and the past symbols and - * the decision made on the samples. Like the phase error - * detector, there are optimized decision algorithms for BPSK and - * QPKS, but 8PSK uses another brute force computation against all - * possible symbols. The modifications to the M&M used here reduce - * self-noise. - * - */ - class DIGITAL_API mpsk_receiver_cc - : virtual public block, - virtual public blocks::control_loop - { - public: - // gr::digital::mpsk_receiver_cc::sptr - typedef boost::shared_ptr<mpsk_receiver_cc> sptr; - - /*! - * \brief Make a M-PSK receiver block. - * - * \param M modulation order of the M-PSK modulation - * \param theta any constant phase rotation from the real axis of the constellation - * \param loop_bw Loop bandwidth to set gains of phase/freq tracking loop - * \param fmin minimum normalized frequency value the loop can achieve - * \param fmax maximum normalized frequency value the loop can achieve - * \param mu initial parameter for the interpolator [0,1] - * \param gain_mu gain parameter of the M&M error signal to adjust mu (~0.05) - * \param omega initial value for the number of symbols between samples (~number of samples/symbol) - * \param gain_omega gain parameter to adjust omega based on the error (~omega^2/4) - * \param omega_rel sets the maximum (omega*(1+omega_rel)) and minimum (omega*(1+omega_rel)) omega (~0.005) - * - * The constructor also chooses which phase detector and - * decision maker to use in the work loop based on the value of - * M. - */ - static sptr make(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); - - //! Returns the modulation order (M) currently set - virtual float modulation_order() const = 0; - - //! Returns current value of theta - virtual float theta() const = 0; - - //! Returns current value of mu - virtual float mu() const = 0; - - //! Returns current value of omega - virtual float omega() const = 0; - - //! Returns mu gain factor - virtual float gain_mu() const = 0; - - //! Returns omega gain factor - virtual float gain_omega() const = 0; - - //! Returns the relative omega limit - virtual float gain_omega_rel() const = 0; - - //! Sets the modulation order (M) currently - virtual void set_modulation_order(unsigned int M) = 0; - - //! Sets value of theta - virtual void set_theta(float theta) = 0; - - //! Sets value of mu - virtual void set_mu(float mu) = 0; - - //! Sets value of omega and its min and max values - virtual void set_omega(float omega) = 0; - - //! Sets value for mu gain factor - virtual void set_gain_mu(float gain_mu) = 0; - - //! Sets value for omega gain factor - virtual void set_gain_omega(float gain_omega) = 0; - - //! Sets the relative omega limit and resets omega min/max values - virtual void set_gain_omega_rel(float omega_rel) = 0; - }; - - } /* namespace digital */ -} /* namespace gr */ - -#endif /* INCLUDED_DIGITAL_MPSK_RECEIVER_CC_H */ |