dec2filter3.h

各种工程计算的库函数

/*

    Decimation filter for rate 2
    Copyright (C) 2001 Jussi Laako

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Low pass FIR filter derived using FFT method with Kaiser window (247 terms).
    Generated by SYSTOLIX Filter Synthesis at 23:24:56 on 10/12/00.
    Specification:
    F1 = 0.225
    F2 = 0.25
    Passband Ripple = 0.1dB
    Stopband Ripple = 96dB

*/


#ifdef _MSC_VER
#pragma warning(disable:4305)
#endif


static const long lDec2FilterLen = 247l;

static const float fDec2FilterGain =  1.0f;
static const float fpDec2FilterCoeffs[] = {
1.2804760603354E-06,
-2.93114320145835E-07,
-2.53249566798398E-06,
5.31945132380323E-19,
4.24364729057348E-06,
8.34763048005216E-07,
-6.40265769584443E-06,
-2.47818085866748E-06,
8.92454809529896E-06,
5.23246202860919E-06,
-1.16280671517797E-05,
-9.41582257781083E-06,
1.42148438962957E-05,
1.53349515698484E-05,
-1.62526932668285E-05,
-2.324917357939E-05,
1.71657672156667E-05,
3.33270571156641E-05,
-1.62343408001224E-05,
-4.55970247501868E-05,
1.26069166513122E-05,
5.98943752413358E-05,
-5.32699328709485E-06,
-7.58079734768297E-05,
-6.62374359229283E-06,
9.2630635160229E-05,
2.42648828644758E-05,
-1.09317859672483E-04,
-4.85395449805537E-05,
1.2445997604886E-04,
8.02208360442279E-05,
-1.36272898047124E-04,
-1.19805297115059E-04,
1.42612479688295E-04,
1.6739760493905E-04,
-1.41016882896816E-04,
-2.22592210338242E-04,
1.28780394853903E-04,
2.84358902153267E-04,
-1.03060769645194E-04,
-3.50940352745776E-04,
6.10204489395269E-05,
4.19770432254912E-04,
-5.0499775016058E-17,
-4.87422378760595E-04,
-8.22801162462087E-05,
5.4959570243643E-04,
1.87495657106879E-04,
-6.01149929475539E-04,
-3.16481088142235E-04,
6.361919316868E-04,
4.68989057763648E-04,
-6.48221650573612E-04,
-6.43459240786764E-04,
6.30338558662855E-04,
8.36810235957201E-04,
-5.75508292914642E-04,
-1.0442688923809E-03,
4.76885669716104E-04,
1.2592514086382E-03,
-3.28186906364254E-04,
-1.47330971800047E-03,
1.24100515662487E-04,
1.67615500544563E-03,
1.39276786824196E-04,
-1.85576770481732E-03,
-4.63995504732204E-04,
1.99860005459662E-03,
8.498184762716E-04,
-2.08987335550309E-03,
-1.29381520852237E-03,
2.1139676273249E-03,
1.79000507564783E-03,
-2.05489660296755E-03,
-2.32906795086075E-03,
1.89685615538286E-03,
2.89813845040549E-03,
-1.62482958107587E-03,
-3.48069616577783E-03,
1.22522892498984E-03,
4.05655896891886E-03,
-6.86547983278262E-04,
-4.60197960359811E-03,
2.70018511220326E-16,
5.08983717378289E-03,
8.39888416827941E-04,
-5.48990451095648E-03,
-1.83475584182895E-03,
5.76915916133569E-03,
2.98198455466883E-03,
-5.89208874948685E-03,
-0.004274403981902,
5.82091860956964E-03,
5.70014008086622E-03,
-5.51565682471692E-03,
-7.24262653939337E-03,
4.93380163259423E-03,
8.88078748319122E-03,
-4.02947405609452E-03,
-0.010589394425977,
2.75159596309383E-03,
1.23395927758908E-02,
-1.04047162665087E-03,
-1.40995856724079E-02,
-1.17837813270827E-03,
1.58354556372589E-02,
4.00532836908473E-03,
-1.75120978472304E-02,
-7.58721686375434E-03,
1.90942331228785E-02,
1.21573842146379E-02,
-2.05474642828664E-02,
-1.81197440078389E-02,
2.18393365899631E-02,
2.62450679337394E-02,
-2.29403617914147E-02,
-3.82035053755644E-02,
2.38249658305568E-02,
5.83742267241757E-02,
-0.024472322685988,
-0.10289121833182,
0.024867040895913,
0.317229034843501,
0.474993824559772,
0.317229034843501,
0.024867040895913,
-0.10289121833182,
-0.024472322685988,
5.83742267241757E-02,
2.38249658305568E-02,
-3.82035053755644E-02,
-2.29403617914147E-02,
2.62450679337394E-02,
2.18393365899631E-02,
-1.81197440078389E-02,
-2.05474642828664E-02,
1.21573842146379E-02,
1.90942331228785E-02,
-7.58721686375434E-03,
-1.75120978472304E-02,
4.00532836908473E-03,
1.58354556372589E-02,
-1.17837813270827E-03,
-1.40995856724079E-02,
-1.04047162665087E-03,
1.23395927758908E-02,
2.75159596309383E-03,
-0.010589394425977,
-4.02947405609452E-03,
8.88078748319122E-03,
4.93380163259423E-03,
-7.24262653939337E-03,
-5.51565682471692E-03,
5.70014008086622E-03,
5.82091860956964E-03,
-0.004274403981902,
-5.89208874948685E-03,
2.98198455466883E-03,
5.76915916133569E-03,
-1.83475584182895E-03,
-5.48990451095648E-03,
8.39888416827941E-04,
5.08983717378289E-03,
2.70018511220326E-16,
-4.60197960359811E-03,
-6.86547983278262E-04,
4.05655896891886E-03,
1.22522892498984E-03,
-3.48069616577783E-03,
-1.62482958107587E-03,
2.89813845040549E-03,
1.89685615538286E-03,
-2.32906795086075E-03,
-2.05489660296755E-03,
1.79000507564783E-03,
2.1139676273249E-03,
-1.29381520852237E-03,
-2.08987335550309E-03,
8.498184762716E-04,
1.99860005459662E-03,
-4.63995504732204E-04,
-1.85576770481732E-03,
1.39276786824196E-04,
1.67615500544563E-03,
1.24100515662487E-04,
-1.47330971800047E-03,
-3.28186906364254E-04,
1.2592514086382E-03,
4.76885669716104E-04,
-1.0442688923809E-03,
-5.75508292914642E-04,
8.36810235957201E-04,
6.30338558662855E-04,
-6.43459240786764E-04,
-6.48221650573612E-04,
4.68989057763648E-04,
6.361919316868E-04,
-3.16481088142235E-04,
-6.01149929475539E-04,
1.87495657106879E-04,
5.4959570243643E-04,
-8.22801162462087E-05,
-4.87422378760595E-04,
-5.0499775016058E-17,
4.19770432254912E-04,
6.10204489395269E-05,
-3.50940352745776E-04,
-1.03060769645194E-04,
2.84358902153267E-04,
1.28780394853903E-04,
-2.22592210338242E-04,
-1.41016882896816E-04,
1.6739760493905E-04,
1.42612479688295E-04,
-1.19805297115059E-04,
-1.36272898047124E-04,
8.02208360442279E-05,
1.2445997604886E-04,
-4.85395449805537E-05,
-1.09317859672483E-04,
2.42648828644758E-05,
9.2630635160229E-05,
-6.62374359229283E-06,
-7.58079734768297E-05,
-5.32699328709485E-06,
5.98943752413358E-05,
1.26069166513122E-05,
-4.55970247501868E-05,
-1.62343408001224E-05,
3.33270571156641E-05,
1.71657672156667E-05,
-2.324917357939E-05,
-1.62526932668285E-05,
1.53349515698484E-05,
1.42148438962957E-05,
-9.41582257781083E-06,
-1.16280671517797E-05,
5.23246202860919E-06,
8.92454809529896E-06,
-2.47818085866748E-06,
-6.40265769584443E-06,
8.34763048005216E-07,
4.24364729057348E-06,
5.31945132380323E-19,
-2.53249566798398E-06,
-2.93114320145835E-07,
1.2804760603354E-06
};

static const double dDec2FilterGain =  1.0;
static const double dpDec2FilterCoeffs[] = {
1.2804760603354E-06,
-2.93114320145835E-07,
-2.53249566798398E-06,
5.31945132380323E-19,
4.24364729057348E-06,
8.34763048005216E-07,
-6.40265769584443E-06,
-2.47818085866748E-06,
8.92454809529896E-06,
5.23246202860919E-06,
-1.16280671517797E-05,
-9.41582257781083E-06,
1.42148438962957E-05,
1.53349515698484E-05,
-1.62526932668285E-05,
-2.324917357939E-05,
1.71657672156667E-05,
3.33270571156641E-05,
-1.62343408001224E-05,
-4.55970247501868E-05,
1.26069166513122E-05,
5.98943752413358E-05,
-5.32699328709485E-06,
-7.58079734768297E-05,
-6.62374359229283E-06,
9.2630635160229E-05,
2.42648828644758E-05,
-1.09317859672483E-04,
-4.85395449805537E-05,
1.2445997604886E-04,
8.02208360442279E-05,
-1.36272898047124E-04,
-1.19805297115059E-04,
1.42612479688295E-04,
1.6739760493905E-04,
-1.41016882896816E-04,
-2.22592210338242E-04,
1.28780394853903E-04,
2.84358902153267E-04,
-1.03060769645194E-04,
-3.50940352745776E-04,
6.10204489395269E-05,
4.19770432254912E-04,
-5.0499775016058E-17,
-4.87422378760595E-04,
-8.22801162462087E-05,
5.4959570243643E-04,
1.87495657106879E-04,
-6.01149929475539E-04,
-3.16481088142235E-04,
6.361919316868E-04,
4.68989057763648E-04,
-6.48221650573612E-04,
-6.43459240786764E-04,
6.30338558662855E-04,
8.36810235957201E-04,
-5.75508292914642E-04,
-1.0442688923809E-03,
4.76885669716104E-04,
1.2592514086382E-03,
-3.28186906364254E-04,
-1.47330971800047E-03,
1.24100515662487E-04,
1.67615500544563E-03,
1.39276786824196E-04,
-1.85576770481732E-03,
-4.63995504732204E-04,
1.99860005459662E-03,
8.498184762716E-04,
-2.08987335550309E-03,
-1.29381520852237E-03,
2.1139676273249E-03,
1.79000507564783E-03,
-2.05489660296755E-03,
-2.32906795086075E-03,
1.89685615538286E-03,
2.89813845040549E-03,
-1.62482958107587E-03,
-3.48069616577783E-03,
1.22522892498984E-03,
4.05655896891886E-03,
-6.86547983278262E-04,
-4.60197960359811E-03,
2.70018511220326E-16,
5.08983717378289E-03,
8.39888416827941E-04,
-5.48990451095648E-03,
-1.83475584182895E-03,
5.76915916133569E-03,
2.98198455466883E-03,
-5.89208874948685E-03,
-0.004274403981902,
5.82091860956964E-03,
5.70014008086622E-03,
-5.51565682471692E-03,
-7.24262653939337E-03,
4.93380163259423E-03,
8.88078748319122E-03,
-4.02947405609452E-03,
-0.010589394425977,
2.75159596309383E-03,
1.23395927758908E-02,
-1.04047162665087E-03,
-1.40995856724079E-02,
-1.17837813270827E-03,
1.58354556372589E-02,
4.00532836908473E-03,
-1.75120978472304E-02,
-7.58721686375434E-03,
1.90942331228785E-02,
1.21573842146379E-02,
-2.05474642828664E-02,
-1.81197440078389E-02,
2.18393365899631E-02,
2.62450679337394E-02,
-2.29403617914147E-02,
-3.82035053755644E-02,
2.38249658305568E-02,
5.83742267241757E-02,
-0.024472322685988,
-0.10289121833182,
0.024867040895913,
0.317229034843501,
0.474993824559772,
0.317229034843501,
0.024867040895913,
-0.10289121833182,
-0.024472322685988,
5.83742267241757E-02,
2.38249658305568E-02,
-3.82035053755644E-02,
-2.29403617914147E-02,
2.62450679337394E-02,
2.18393365899631E-02,
-1.81197440078389E-02,
-2.05474642828664E-02,
1.21573842146379E-02,
1.90942331228785E-02,
-7.58721686375434E-03,
-1.75120978472304E-02,
4.00532836908473E-03,
1.58354556372589E-02,
-1.17837813270827E-03,
-1.40995856724079E-02,
-1.04047162665087E-03,
1.23395927758908E-02,
2.75159596309383E-03,
-0.010589394425977,
-4.02947405609452E-03,
8.88078748319122E-03,
4.93380163259423E-03,
-7.24262653939337E-03,
-5.51565682471692E-03,
5.70014008086622E-03,
5.82091860956964E-03,
-0.004274403981902,
-5.89208874948685E-03,
2.98198455466883E-03,
5.76915916133569E-03,
-1.83475584182895E-03,
-5.48990451095648E-03,
8.39888416827941E-04,
5.08983717378289E-03,
2.70018511220326E-16,
-4.60197960359811E-03,
-6.86547983278262E-04,
4.05655896891886E-03,
1.22522892498984E-03,
-3.48069616577783E-03,
-1.62482958107587E-03,
2.89813845040549E-03,
1.89685615538286E-03,
-2.32906795086075E-03,
-2.05489660296755E-03,
1.79000507564783E-03,
2.1139676273249E-03,
-1.29381520852237E-03,
-2.08987335550309E-03,
8.498184762716E-04,
1.99860005459662E-03,
-4.63995504732204E-04,
-1.85576770481732E-03,
1.39276786824196E-04,
1.67615500544563E-03,
1.24100515662487E-04,
-1.47330971800047E-03,
-3.28186906364254E-04,
1.2592514086382E-03,
4.76885669716104E-04,
-1.0442688923809E-03,
-5.75508292914642E-04,
8.36810235957201E-04,
6.30338558662855E-04,
-6.43459240786764E-04,
-6.48221650573612E-04,
4.68989057763648E-04,
6.361919316868E-04,
-3.16481088142235E-04,
-6.01149929475539E-04,
1.87495657106879E-04,
5.4959570243643E-04,
-8.22801162462087E-05,
-4.87422378760595E-04,
-5.0499775016058E-17,
4.19770432254912E-04,
6.10204489395269E-05,
-3.50940352745776E-04,
-1.03060769645194E-04,
2.84358902153267E-04,
1.28780394853903E-04,
-2.22592210338242E-04,
-1.41016882896816E-04,
1.6739760493905E-04,
1.42612479688295E-04,
-1.19805297115059E-04,
-1.36272898047124E-04,
8.02208360442279E-05,
1.2445997604886E-04,
-4.85395449805537E-05,
-1.09317859672483E-04,
2.42648828644758E-05,
9.2630635160229E-05,
-6.62374359229283E-06,
-7.58079734768297E-05,
-5.32699328709485E-06,
5.98943752413358E-05,
1.26069166513122E-05,
-4.55970247501868E-05,
-1.62343408001224E-05,
3.33270571156641E-05,
1.71657672156667E-05,
-2.324917357939E-05,
-1.62526932668285E-05,
1.53349515698484E-05,
1.42148438962957E-05,
-9.41582257781083E-06,
-1.16280671517797E-05,
5.23246202860919E-06,
8.92454809529896E-06,
-2.47818085866748E-06,
-6.40265769584443E-06,
8.34763048005216E-07,
4.24364729057348E-06,
5.31945132380323E-19,
-2.53249566798398E-06,
-2.93114320145835E-07,
1.2804760603354E-06
};