GNU Radio 3.6.4 C++ API
rotator.h
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/* -*- c++ -*- */
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/*
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* Copyright 2003,2008,2012 Free Software Foundation, Inc.
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*
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* This file is part of GNU Radio
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*
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* GNU Radio 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; either version 3, or (at your option)
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* any later version.
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*
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* GNU Radio 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 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 GNU Radio; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef _ANALOG_ROTATOR_H_
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#define _ANALOG_ROTATOR_H_
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#include <
analog/api.h
>
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#include <
gr_complex.h
>
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namespace
gr {
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namespace
analog {
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class
rotator
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{
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private
:
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gr_complex
d_phase;
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gr_complex
d_phase_incr;
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unsigned
int
d_counter;
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public
:
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rotator
() : d_phase (1), d_phase_incr (1), d_counter(0)
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{ }
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void
set_phase
(
gr_complex
phase) { d_phase = phase / abs(phase); }
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void
set_phase_incr
(
gr_complex
incr) { d_phase_incr = incr / abs(incr); }
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gr_complex
rotate
(
gr_complex
in)
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{
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d_counter++;
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gr_complex
z = in * d_phase;
// rotate in by phase
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d_phase *= d_phase_incr;
// incr our phase (complex mult == add phases)
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if
((d_counter % 512) == 0)
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d_phase /= abs(d_phase);
// Normalize to ensure multiplication is rotation
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return
z;
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}
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};
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}
/* namespace analog */
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}
/* namespace gr */
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#endif
/* _ANALOG_ROTATOR_H_ */
gnuradio
gr-analog
include
analog
rotator.h
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