Qucs-core
0.0.19
|
00001 /* 00002 * fourier.h - fourier transformation class definitions 00003 * 00004 * Copyright (C) 2005, 2006, 2009 Stefan Jahn <stefan@lkcc.org> 00005 * 00006 * This is free software; you can redistribute it and/or modify 00007 * it under the terms of the GNU General Public License as published by 00008 * the Free Software Foundation; either version 2, or (at your option) 00009 * any later version. 00010 * 00011 * This software is distributed in the hope that it will be useful, 00012 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00013 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00014 * GNU General Public License for more details. 00015 * 00016 * You should have received a copy of the GNU General Public License 00017 * along with this package; see the file COPYING. If not, write to 00018 * the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor, 00019 * Boston, MA 02110-1301, USA. 00020 * 00021 * $Id$ 00022 * 00023 */ 00024 00025 #ifndef __FOURIER_H__ 00026 #define __FOURIER_H__ 00027 00028 namespace qucs { 00029 00030 class vector; 00031 00032 namespace fourier { 00033 00034 // public functions 00035 qucs::vector fft_1d (qucs::vector, int isign = 1); 00036 qucs::vector ifft_1d (qucs::vector); 00037 qucs::vector dft_1d (qucs::vector, int isign = 1); 00038 qucs::vector idft_1d (qucs::vector); 00039 00040 // additional public function 00041 qucs::vector fftshift (qucs::vector); 00042 00043 // internal functions 00044 void _fft_1d (nr_double_t *, int, int isign = 1); 00045 void _ifft_1d (nr_double_t *, int); 00046 void _dft_1d (nr_double_t *, int, int isign = 1); 00047 void _idft_1d (nr_double_t *, int); 00048 00049 void _fft_1d_2r (nr_double_t *, nr_double_t *, int); 00050 void _ifft_1d_2r (nr_double_t *, nr_double_t *, int); 00051 00052 void _fft_nd (nr_double_t *, int[], int, int isign = 1); 00053 void _ifft_nd (nr_double_t *, int[], int); 00054 00055 } // namespace 00056 00057 } // namespace qucs 00058 00059 #endif /* __FOURIER_H__ */