00001 /* -*- c++ -*- */ 00002 /* 00003 * Copyright 2003 Free Software Foundation, Inc. 00004 * 00005 * This file is part of GNU Radio 00006 * 00007 * GNU Radio is free software; you can redistribute it and/or modify 00008 * it under the terms of the GNU General Public License as published by 00009 * the Free Software Foundation; either version 2, or (at your option) 00010 * any later version. 00011 * 00012 * GNU Radio is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00015 * GNU General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU General Public License 00018 * along with GNU Radio; see the file COPYING. If not, write to 00019 * the Free Software Foundation, Inc., 59 Temple Place - Suite 330, 00020 * Boston, MA 02111-1307, USA. 00021 */ 00022 00023 #ifndef _GR_ROTATOR_H_ 00024 #define _GR_ROTATOR_H_ 00025 00026 #include <gr_complex.h> 00027 00028 class gr_rotator { 00029 gr_complex d_phase; 00030 gr_complex d_phase_incr; 00031 00032 public: 00033 gr_rotator () : d_phase (1), d_phase_incr (0) { } 00034 00035 void set_phase (gr_complex phase) { d_phase = phase; } 00036 void set_phase_incr (gr_complex incr) { d_phase_incr = incr; } 00037 00038 gr_complex rotate (gr_complex in){ 00039 d_phase *= d_phase_incr; // incr our phase (complex mult == add phases) 00040 00041 d_phase /= abs(d_phase); // ensure multiplication is rotation 00042 // FIXME. This is expensive. Maybe workaround using 00043 // double precision complex??? 00044 00045 return in * d_phase; // rotate in by phase 00046 } 00047 00048 }; 00049 00050 #endif /* _GR_ROTATOR_H_ */
1.4.1