GNU Radio Manual and C++ API Reference 3.7.14.0
The Free & Open Software Radio Ecosystem
rotator.h
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1/* -*- c++ -*- */
2/*
3 * Copyright 2003,2008,2013 Free Software Foundation, Inc.
4 *
5 * This file is part of GNU Radio
6 *
7 * GNU Radio is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3, or (at your option)
10 * any later version.
11 *
12 * GNU Radio is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with GNU Radio; see the file COPYING. If not, write to
19 * the Free Software Foundation, Inc., 51 Franklin Street,
20 * Boston, MA 02110-1301, USA.
21 */
22
23#ifndef _GR_ROTATOR_H_
24#define _GR_ROTATOR_H_
25
26#include <gnuradio/blocks/api.h>
27#include <gnuradio/gr_complex.h>
28#include <volk/volk.h>
29#include <cmath>
30
31namespace gr {
32namespace blocks {
33
35{
36private:
37 gr_complex d_phase;
38 gr_complex d_phase_incr;
39 unsigned int d_counter;
40
41public:
42 rotator() : d_phase(1), d_phase_incr(1), d_counter(0) {}
43
44 void set_phase(gr_complex phase) { d_phase = phase / std::abs(phase); }
45 void set_phase_incr(gr_complex incr) { d_phase_incr = incr / std::abs(incr); }
46
48 {
49 d_counter++;
50
51 gr_complex z = in * d_phase; // rotate in by phase
52 d_phase *= d_phase_incr; // incr our phase (complex mult == add phases)
53
54 if ((d_counter % 512) == 0)
55 d_phase /=
56 std::abs(d_phase); // Normalize to ensure multiplication is rotation
57
58 return z;
59 }
60
61 void rotateN(gr_complex* out, const gr_complex* in, int n)
62 {
63 volk_32fc_s32fc_x2_rotator_32fc(out, in, d_phase_incr, &d_phase, n);
64 }
65};
66
67} /* namespace blocks */
68} /* namespace gr */
69
70#endif /* _GR_ROTATOR_H_ */
Definition: rotator.h:35
void set_phase(gr_complex phase)
Definition: rotator.h:44
gr_complex rotate(gr_complex in)
Definition: rotator.h:47
rotator()
Definition: rotator.h:42
void set_phase_incr(gr_complex incr)
Definition: rotator.h:45
void rotateN(gr_complex *out, const gr_complex *in, int n)
Definition: rotator.h:61
std::complex< float > gr_complex
Definition: gr_complex.h:27
Include this header to use the message passing features.
Definition: basic_block.h:45