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IntHalBandFilter: added order 96

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This commit is contained in:
f4exb 2016-10-30 23:04:54 +01:00
parent f5bbbb7cab
commit 06b2c4930e
2 changed files with 47 additions and 1 deletions
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37
sdrbase/dsp/inthalfbandfilter.cpp
View File

@ -139,3 +139,40 @@ const qint32 HBFIRFilterTraits<80>::hbCoeffs[20] = {
(qint32)( 0.3176437752925042046214798574510496109724 * (1 << hbShift)),
};
const qint16 HBFIRFilterTraits<96>::hbMod[96+6] = {
95,96,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,
24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,
47,48,49,50,51,52,53,54,55,56,57,58,59,60,61,62,63,64,65,66,67,68,69,
70,71,72,73,74,75,76,77,78,79,80,81,82,83,84,85,86,87,88,89,90,91,92,
93,94,95,96,0,1,2
};
const qint32 HBFIRFilterTraits<96>::hbCoeffs[24] = {
//* Remez as in https://www.dsprelated.com/showcode/270.php */
(qint32)(-0.0000243052463317893968695708462046667364 * (1 << hbShift)),
(qint32)( 0.0000503567741519847557611806732058568059 * (1 << hbShift)),
(qint32)(-0.0001002354600628052128195172310043403741 * (1 << hbShift)),
(qint32)( 0.0001801275832684542921834081052878673290 * (1 << hbShift)),
(qint32)(-0.0003014864432246496970743687704441526876 * (1 << hbShift)),
(qint32)( 0.0004783148860127731604417744559754055445 * (1 << hbShift)),
(qint32)(-0.0007274200147704492930983422027679807798 * (1 << hbShift)),
(qint32)( 0.0010686503612886001472748187524075547117 * (1 << hbShift)),
(qint32)(-0.0015251456116906108098629779590282851132 * (1 << hbShift)),
(qint32)( 0.0021238131085570461677181075543785482296 * (1 << hbShift)),
(qint32)(-0.0028960654265650425873146467381502588978 * (1 << hbShift)),
(qint32)( 0.0038789688077727475616629515542399531114 * (1 << hbShift)),
(qint32)(-0.0051173875903961539915454359572777320864 * (1 << hbShift)),
(qint32)( 0.0066675444490017317031305132957186287967 * (1 << hbShift)),
(qint32)(-0.0086031967328669932404405784609480178915 * (1 << hbShift)),
(qint32)( 0.0110268456349653827530676863943881471641 * (1 << hbShift)),
(qint32)(-0.0140900919878225727721599014330422505736 * (1 << hbShift)),
(qint32)( 0.0180336055419063577553995258995200856589 * (1 << hbShift)),
(qint32)(-0.0232708957455770061584221508610426099040 * (1 << hbShift)),
(qint32)( 0.0305843805330435619671547442521841730922 * (1 << hbShift)),
(qint32)(-0.0416576245224431485070226699463091790676 * (1 << hbShift)),
(qint32)( 0.0608846679850302968661779345893592108041 * (1 << hbShift)),
(qint32)(-0.1044156487571061137087369274922821205109 * (1 << hbShift)),
(qint32)( 0.3177437550265513332981015537370694801211 * (1 << hbShift)),
};

11
sdrbase/dsp/inthalfbandfilter.h
View File

@ -8,7 +8,7 @@
// uses Q1.14 format internally, input and output are S16
/*
* supported filter orders: 80, 64, 48, 32
* supported filter orders: 96, 80, 64, 48, 32
* any usage of another value will be prevented by compilation errors
*/
template<uint32_t HBFilterOrder>
@ -52,6 +52,15 @@ struct HBFIRFilterTraits<80>
static const qint32 hbCoeffs[20];
};
template<>
struct HBFIRFilterTraits<96>
{
static const qint32 hbOrder = 96;
static const qint32 hbShift = 16;
static const qint16 hbMod[96+6];
static const qint32 hbCoeffs[24];
};
template<uint32_t HBFilterOrder>
class SDRANGEL_API IntHalfbandFilter {
public: