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GrHilbert.h

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00001 /* -*- Mode: c++ -*- */ 00002 /* 00003 * Copyright 2001 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 00024 #ifndef _GRHILBERT_H_ 00025 #define _GRHILBERT_H_ 00026 00027 #include <VrHistoryProc.h> 00028 #include <VrComplex.h> 00029 #include <gr_fir.h> 00030 #include <gr_firdes.h> 00031 00032 template<class iType> 00033 class GrHilbert : public VrHistoryProc<iType,VrComplex> { 00034 private: 00035 gr_fir<float,iType,float> hilb; 00036 unsigned int taps; 00037 public: 00038 virtual const char *name() { return "GrHilbert"; } 00039 virtual int work(VrSampleRange output, void *o[], 00040 VrSampleRange inputs[], void *i[]); 00041 GrHilbert(unsigned int taps); 00042 }; 00043 00044 template<class iType> int 00045 GrHilbert<iType>::work(VrSampleRange output, void *ao[], 00046 VrSampleRange inputs[], void *ai[]) 00047 { 00048 iType **i = (iType **)ai; 00049 VrComplex **o = (VrComplex **)ao; 00050 int size = output.size; 00051 for(int x = 0; x<size; x++) 00052 { 00053 o[0][x].real(i[0][x+taps/2]); 00054 o[0][x].imag(hilb.filter(&i[0][x])); 00055 } 00056 return output.size; 00057 } 00058 00059 template<class iType> 00060 GrHilbert<iType>::GrHilbert(unsigned int taps) 00061 : VrHistoryProc<iType,VrComplex>(1), 00062 hilb(gr_firdes::hilbert(taps)),taps(taps) 00063 { 00064 history = taps; 00065 } 00066 #endif

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