dec3filter2.h

各种工程计算的库函数

/*

    Decimation filter for rate 3
    Copyright (C) 2002 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

    Specification:
    F1 = 0.15
    F2 = 0.16667
    Passband Ripple = 0.5dB
    Stopband Ripple = 72dB

*/


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


static const long lDec3FilterLen = 269l;

static const float fDec3FilterGain = 1.0f;
static const float fpDec3FilterCoeffs[] = {
    1.4096372904008E-5,
    6.20864138759773E-6,
    -1.1962729404551E-5,
    -2.3778279419585E-5,
    -1.37988638657019E-5,
    1.42982964890982E-5,
    3.57611210679811E-5,
    2.56583454617911E-5,
    -1.41019848338753E-5,
    -4.95645715823098E-5,
    -4.25975916104745E-5,
    9.86972330349088E-6,
    6.4292642910095E-5,
    6.52173292050969E-5,
    1.07411756764564E-7,
    -7.85777822549059E-5,
    -9.37833399642397E-5,
    -1.7655835525004E-5,
    9.05491555062634E-5,
    0.000128095280529279,
    4.4599340609907E-5,
    -9.78329041648437E-5,
    -0.000167358149248424,
    -8.26081518714629E-5,
    9.75912356810728E-5,
    0.000210066418135909,
    0.000133021622317071,
    -8.66056523613292E-5,
    -0.000253911694810618,
    -0.000196651646121069,
    6.1407475603902E-5,
    0.000295724989629861,
    0.00027357634309151,
    -1.84561614124296E-5,
    -0.000331464146959595,
    -0.000362935731804699,
    -4.56371428365029E-5,
    0.000356255708620847,
    0.000462742768716115,
    0.000133846612821439,
    -0.000364498414627643,
    -0.000569724116403903,
    -0.00024843842203411,
    0.000350032769301898,
    0.00067920517388833,
    0.000390659232116752,
    -0.000306377724260953,
    -0.000785053156055708,
    -0.000560421275268845,
    0.000227031722387706,
    0.000879690300667851,
    0.000756000752341839,
    -0.000105831325587101,
    -0.000954186623634888,
    -0.000973767333923201,
    -6.26433305530141E-5,
    0.000998438113774386,
    0.00120796255638057,
    0.000282630668000598,
    -0.00100143199873018,
    -0.0014505437201697,
    -0.00055673483320841,
    0.00095159592487695,
    0.00169110744617701,
    0.000885477472904616,
    -0.000837222826838131,
    -0.00191690330465025,
    -0.00126687461894528,
    0.000646958204700424,
    0.00211294292648631,
    0.00169605864878857,
    -0.000370331787776399,
    -0.00226220379715888,
    -0.00216496304557647,
    -1.68854662082256E-6,
    0.00234591958025032,
    0.00266208348086279,
    0.000476145920036037,
    -0.00234394033095523,
    -0.00317232229120777,
    -0.00105757399938588,
    0.00223513621360957,
    0.00367691429794633,
    0.00174753491673876,
    -0.00199780692233268,
    -0.00415341942405608,
    -0.00254424267576005,
    0.00161004497604152,
    0.00457575041203517,
    0.0034422967559576,
    -0.00104998247996542,
    -0.00491417972577139,
    -0.00443254672984049,
    0.000295824008691556,
    0.0051352337843152,
    0.0055021034584392,
    0.00067447445104106,
    -0.00520132592895121,
    -0.00663450605464705,
    -0.00188409376107094,
    0.00506988365615844,
    0.00781004660571238,
    0.0033591541480259,
    -0.00469155241522291,
    -0.00900624699133973,
    -0.00513203790842882,
    0.00400672388255265,
    0.0101984744288057,
    0.00724736861721566,
    -0.00293894622061084,
    -0.0113606750456741,
    -0.00977294137547623,
    0.00138223980575868,
    0.0124661982412304,
    0.0128206286698581,
    0.000824370577933274,
    -0.0134886792341002,
    -0.0165893640917177,
    -0.00395177519413615,
    0.0144029433334805,
    0.021463049433415,
    0.00851253006822971,
    -0.0151858933651067,
    -0.0282679100770945,
    -0.0156304647552868,
    0.0158173414863161,
    0.0391074487429995,
    0.0283611944633451,
    -0.0162807483877078,
    -0.0612003887785374,
    -0.0589548036814126,
    0.0165638365420887,
    0.145252077169374,
    0.266842355959178,
    0.316588591101213,
    0.266842355959178,
    0.145252077169374,
    0.0165638365420887,
    -0.0589548036814126,
    -0.0612003887785374,
    -0.0162807483877078,
    0.0283611944633451,
    0.0391074487429995,
    0.0158173414863161,
    -0.0156304647552868,
    -0.0282679100770945,
    -0.0151858933651067,
    0.00851253006822971,
    0.021463049433415,
    0.0144029433334805,
    -0.00395177519413615,
    -0.0165893640917177,
    -0.0134886792341002,
    0.000824370577933274,
    0.0128206286698581,
    0.0124661982412304,
    0.00138223980575868,
    -0.00977294137547623,
    -0.0113606750456741,
    -0.00293894622061084,
    0.00724736861721566,
    0.0101984744288057,
    0.00400672388255265,
    -0.00513203790842882,
    -0.00900624699133973,
    -0.00469155241522291,
    0.0033591541480259,
    0.00781004660571238,
    0.00506988365615844,
    -0.00188409376107094,
    -0.00663450605464705,
    -0.00520132592895121,
    0.00067447445104106,
    0.0055021034584392,
    0.0051352337843152,
    0.000295824008691556,
    -0.00443254672984049,
    -0.00491417972577139,
    -0.00104998247996542,
    0.0034422967559576,
    0.00457575041203517,
    0.00161004497604152,
    -0.00254424267576005,
    -0.00415341942405608,
    -0.00199780692233268,
    0.00174753491673876,
    0.00367691429794633,
    0.00223513621360957,
    -0.00105757399938588,
    -0.00317232229120777,
    -0.00234394033095523,
    0.000476145920036037,
    0.00266208348086279,
    0.00234591958025032,
    -1.68854662082256E-6,
    -0.00216496304557647,
    -0.00226220379715888,
    -0.000370331787776399,
    0.00169605864878857,
    0.00211294292648631,
    0.000646958204700424,
    -0.00126687461894528,
    -0.00191690330465025,
    -0.000837222826838131,
    0.000885477472904616,
    0.00169110744617701,
    0.00095159592487695,
    -0.00055673483320841,
    -0.0014505437201697,
    -0.00100143199873018,
    0.000282630668000598,
    0.00120796255638057,
    0.000998438113774386,
    -6.26433305530141E-5,
    -0.000973767333923201,
    -0.000954186623634888,
    -0.000105831325587101,
    0.000756000752341839,
    0.000879690300667851,
    0.000227031722387706,
    -0.000560421275268845,
    -0.000785053156055708,
    -0.000306377724260953,
    0.000390659232116752,
    0.00067920517388833,
    0.000350032769301898,
    -0.00024843842203411,
    -0.000569724116403903,
    -0.000364498414627643,
    0.000133846612821439,
    0.000462742768716115,
    0.000356255708620847,
    -4.56371428365029E-5,
    -0.000362935731804699,
    -0.000331464146959595,
    -1.84561614124296E-5,
    0.00027357634309151,
    0.000295724989629861,
    6.1407475603902E-5,
    -0.000196651646121069,
    -0.000253911694810618,
    -8.66056523613292E-5,
    0.000133021622317071,
    0.000210066418135909,
    9.75912356810728E-5,
    -8.26081518714629E-5,
    -0.000167358149248424,
    -9.78329041648437E-5,
    4.4599340609907E-5,
    0.000128095280529279,
    9.05491555062634E-5,
    -1.7655835525004E-5,
    -9.37833399642397E-5,
    -7.85777822549059E-5,
    1.07411756764564E-7,
    6.52173292050969E-5,
    6.4292642910095E-5,
    9.86972330349088E-6,
    -4.25975916104745E-5,
    -4.95645715823098E-5,
    -1.41019848338753E-5,
    2.56583454617911E-5,
    3.57611210679811E-5,
    1.42982964890982E-5,
    -1.37988638657019E-5,
    -2.3778279419585E-5,
    -1.1962729404551E-5,
    6.20864138759773E-6,
    1.4096372904008E-5
};


static const double dDec3FilterGain = 1.0;
static const double dpDec3FilterCoeffs[] = {
    1.4096372904008E-5,
    6.20864138759773E-6,
    -1.1962729404551E-5,
    -2.3778279419585E-5,
    -1.37988638657019E-5,
    1.42982964890982E-5,
    3.57611210679811E-5,
    2.56583454617911E-5,
    -1.41019848338753E-5,
    -4.95645715823098E-5,
    -4.25975916104745E-5,
    9.86972330349088E-6,
    6.4292642910095E-5,
    6.52173292050969E-5,
    1.07411756764564E-7,
    -7.85777822549059E-5,
    -9.37833399642397E-5,
    -1.7655835525004E-5,
    9.05491555062634E-5,
    0.000128095280529279,
    4.4599340609907E-5,
    -9.78329041648437E-5,
    -0.000167358149248424,
    -8.26081518714629E-5,
    9.75912356810728E-5,
    0.000210066418135909,
    0.000133021622317071,
    -8.66056523613292E-5,
    -0.000253911694810618,
    -0.000196651646121069,
    6.1407475603902E-5,
    0.000295724989629861,
    0.00027357634309151,
    -1.84561614124296E-5,
    -0.000331464146959595,
    -0.000362935731804699,
    -4.56371428365029E-5,
    0.000356255708620847,
    0.000462742768716115,
    0.000133846612821439,
    -0.000364498414627643,
    -0.000569724116403903,
    -0.00024843842203411,
    0.000350032769301898,
    0.00067920517388833,
    0.000390659232116752,
    -0.000306377724260953,
    -0.000785053156055708,
    -0.000560421275268845,
    0.000227031722387706,
    0.000879690300667851,
    0.000756000752341839,
    -0.000105831325587101,
    -0.000954186623634888,
    -0.000973767333923201,
    -6.26433305530141E-5,
    0.000998438113774386,
    0.00120796255638057,
    0.000282630668000598,
    -0.00100143199873018,
    -0.0014505437201697,
    -0.00055673483320841,
    0.00095159592487695,
    0.00169110744617701,
    0.000885477472904616,
    -0.000837222826838131,
    -0.00191690330465025,
    -0.00126687461894528,
    0.000646958204700424,
    0.00211294292648631,
    0.00169605864878857,
    -0.000370331787776399,
    -0.00226220379715888,
    -0.00216496304557647,
    -1.68854662082256E-6,
    0.00234591958025032,
    0.00266208348086279,
    0.000476145920036037,
    -0.00234394033095523,
    -0.00317232229120777,
    -0.00105757399938588,
    0.00223513621360957,
    0.00367691429794633,
    0.00174753491673876,
    -0.00199780692233268,
    -0.00415341942405608,
    -0.00254424267576005,
    0.00161004497604152,
    0.00457575041203517,
    0.0034422967559576,
    -0.00104998247996542,
    -0.00491417972577139,
    -0.00443254672984049,
    0.000295824008691556,
    0.0051352337843152,
    0.0055021034584392,
    0.00067447445104106,
    -0.00520132592895121,
    -0.00663450605464705,
    -0.00188409376107094,
    0.00506988365615844,
    0.00781004660571238,
    0.0033591541480259,
    -0.00469155241522291,
    -0.00900624699133973,
    -0.00513203790842882,
    0.00400672388255265,
    0.0101984744288057,
    0.00724736861721566,
    -0.00293894622061084,
    -0.0113606750456741,
    -0.00977294137547623,
    0.00138223980575868,
    0.0124661982412304,
    0.0128206286698581,
    0.000824370577933274,
    -0.0134886792341002,
    -0.0165893640917177,
    -0.00395177519413615,
    0.0144029433334805,
    0.021463049433415,
    0.00851253006822971,
    -0.0151858933651067,
    -0.0282679100770945,
    -0.0156304647552868,
    0.0158173414863161,
    0.0391074487429995,
    0.0283611944633451,
    -0.0162807483877078,
    -0.0612003887785374,
    -0.0589548036814126,
    0.0165638365420887,
    0.145252077169374,
    0.266842355959178,
    0.316588591101213,
    0.266842355959178,
    0.145252077169374,
    0.0165638365420887,
    -0.0589548036814126,
    -0.0612003887785374,
    -0.0162807483877078,
    0.0283611944633451,
    0.0391074487429995,
    0.0158173414863161,
    -0.0156304647552868,
    -0.0282679100770945,
    -0.0151858933651067,
    0.00851253006822971,
    0.021463049433415,
    0.0144029433334805,
    -0.00395177519413615,
    -0.0165893640917177,
    -0.0134886792341002,
    0.000824370577933274,
    0.0128206286698581,
    0.0124661982412304,
    0.00138223980575868,
    -0.00977294137547623,
    -0.0113606750456741,
    -0.00293894622061084,
    0.00724736861721566,
    0.0101984744288057,
    0.00400672388255265,
    -0.00513203790842882,
    -0.00900624699133973,
    -0.00469155241522291,
    0.0033591541480259,
    0.00781004660571238,
    0.00506988365615844,
    -0.00188409376107094,
    -0.00663450605464705,
    -0.00520132592895121,
    0.00067447445104106,
    0.0055021034584392,
    0.0051352337843152,
    0.000295824008691556,
    -0.00443254672984049,
    -0.00491417972577139,
    -0.00104998247996542,
    0.0034422967559576,
    0.00457575041203517,
    0.00161004497604152,
    -0.00254424267576005,
    -0.00415341942405608,
    -0.00199780692233268,
    0.00174753491673876,
    0.00367691429794633,
    0.00223513621360957,
    -0.00105757399938588,
    -0.00317232229120777,
    -0.00234394033095523,
    0.000476145920036037,
    0.00266208348086279,
    0.00234591958025032,
    -1.68854662082256E-6,
    -0.00216496304557647,
    -0.00226220379715888,
    -0.000370331787776399,
    0.00169605864878857,
    0.00211294292648631,
    0.000646958204700424,
    -0.00126687461894528,
    -0.00191690330465025,
    -0.000837222826838131,
    0.000885477472904616,
    0.00169110744617701,
    0.00095159592487695,
    -0.00055673483320841,
    -0.0014505437201697,
    -0.00100143199873018,
    0.000282630668000598,
    0.00120796255638057,
    0.000998438113774386,
    -6.26433305530141E-5,
    -0.000973767333923201,
    -0.000954186623634888,
    -0.000105831325587101,
    0.000756000752341839,
    0.000879690300667851,
    0.000227031722387706,
    -0.000560421275268845,
    -0.000785053156055708,
    -0.000306377724260953,
    0.000390659232116752,
    0.00067920517388833,
    0.000350032769301898,
    -0.00024843842203411,
    -0.000569724116403903,
    -0.000364498414627643,
    0.000133846612821439,
    0.000462742768716115,
    0.000356255708620847,
    -4.56371428365029E-5,
    -0.000362935731804699,
    -0.000331464146959595,
    -1.84561614124296E-5,
    0.00027357634309151,
    0.000295724989629861,
    6.1407475603902E-5,
    -0.000196651646121069,
    -0.000253911694810618,
    -8.66056523613292E-5,
    0.000133021622317071,
    0.000210066418135909,
    9.75912356810728E-5,
    -8.26081518714629E-5,
    -0.000167358149248424,
    -9.78329041648437E-5,
    4.4599340609907E-5,
    0.000128095280529279,
    9.05491555062634E-5,
    -1.7655835525004E-5,
    -9.37833399642397E-5,
    -7.85777822549059E-5,
    1.07411756764564E-7,
    6.52173292050969E-5,
    6.4292642910095E-5,
    9.86972330349088E-6,
    -4.25975916104745E-5,
    -4.95645715823098E-5,
    -1.41019848338753E-5,
    2.56583454617911E-5,
    3.57611210679811E-5,
    1.42982964890982E-5,
    -1.37988638657019E-5,
    -2.3778279419585E-5,
    -1.1962729404551E-5,
    6.20864138759773E-6,
    1.4096372904008E-5
};