不韋 呂 / DSP_MultirateLinearphase

STM32F446 内蔵の DAC から出力する際に，補間フィルタを利用し，標本化周波数を入力の際の４倍の標本化周波数で出力するためのライブラリ．このライブラリを登録した際のプログラム： Demo_DSP_ADDA_Multirate. Library for outputting from built-in DAC in STM32F446 using interpolation filter at sampling frequency of 4 times in case of input.

Dependencies:   Array_Matrix DSP_ADDA

Dependents:   Demo_DSP_ADDA_Multirate DSP_AD_DA_Multirate DSP_GraphicEqualizerB DSP_VariableLHpfB ... more

MultirateLiPhCoefs.hpp@12:f7bfe38c93ab, 2021-12-22 (annotated)

Committer:
MikamiUitOpen
Date:
Wed Dec 22 08:01:24 2021 +0000
Revision:
12:f7bfe38c93ab
13

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 12:f7bfe38c93ab 1 //-------------------------------------------------------------------
MikamiUitOpen 12:f7bfe38c93ab 2 // デフォルトの補間用フィルタの係数
MikamiUitOpen 12:f7bfe38c93ab 3 // この係数は，入力の標本化周波数を 10 kHz，
MikamiUitOpen 12:f7bfe38c93ab 4 // 出力の標本化周波数を 40 kHz として設計した
MikamiUitOpen 12:f7bfe38c93ab 5 //
MikamiUitOpen 12:f7bfe38c93ab 6 // 2021/12/22, Copyright (c) 2021 MIKAMI, Naoki
MikamiUitOpen 12:f7bfe38c93ab 7 //-------------------------------------------------------------------
MikamiUitOpen 12:f7bfe38c93ab 8
MikamiUitOpen 12:f7bfe38c93ab 9 #include "MultirateLiPh.hpp"
MikamiUitOpen 12:f7bfe38c93ab 10
MikamiUitOpen 12:f7bfe38c93ab 11 namespace Mikami
MikamiUitOpen 12:f7bfe38c93ab 12 {
MikamiUitOpen 12:f7bfe38c93ab 13 // 使用窓関数 Kaiser 窓
MikamiUitOpen 12:f7bfe38c93ab 14 // 標本化周波数 (kHz) 40.000000
MikamiUitOpen 12:f7bfe38c93ab 15 // 次数 72
MikamiUitOpen 12:f7bfe38c93ab 16 // 種類 LPF
MikamiUitOpen 12:f7bfe38c93ab 17 // 遮断周波数 (kHz) 5.000000
MikamiUitOpen 12:f7bfe38c93ab 18 // 減衰量 (dB) 40.00
MikamiUitOpen 12:f7bfe38c93ab 19 const int MultirateLiPh::ORDER_ = 72;
MikamiUitOpen 12:f7bfe38c93ab 20 const float MultirateLiPh::HK1_[] = {
MikamiUitOpen 12:f7bfe38c93ab 21 4.431256E-03f, -8.146596E-03f, 1.341366E-02f, -2.077330E-02f,
MikamiUitOpen 12:f7bfe38c93ab 22 3.116614E-02f, -4.650688E-02f, 7.151836E-02f, -1.218529E-01f,
MikamiUitOpen 12:f7bfe38c93ab 23 2.971602E-01f, 8.993316E-01f, -1.751857E-01f, 9.144896E-02f,
MikamiUitOpen 12:f7bfe38c93ab 24 -5.727932E-02f, 3.802786E-02f, -2.550498E-02f, 1.678651E-02f,
MikamiUitOpen 12:f7bfe38c93ab 25 -1.055827E-02f, 6.120216E-03f};
MikamiUitOpen 12:f7bfe38c93ab 26 const float MultirateLiPh::HK2_[] = {
MikamiUitOpen 12:f7bfe38c93ab 27 7.405152E-03f, -1.315348E-02f, 2.125564E-02f, -3.257789E-02f,
MikamiUitOpen 12:f7bfe38c93ab 28 4.868468E-02f, -7.290120E-02f, 1.139337E-01f, -2.039652E-01f,
MikamiUitOpen 12:f7bfe38c93ab 29 6.338376E-01f, 6.338376E-01f, -2.039652E-01f, 1.139337E-01f,
MikamiUitOpen 12:f7bfe38c93ab 30 -7.290120E-02f, 4.868468E-02f, -3.257789E-02f, 2.125564E-02f,
MikamiUitOpen 12:f7bfe38c93ab 31 -1.315348E-02f, 7.405152E-03f};
MikamiUitOpen 12:f7bfe38c93ab 32 const float MultirateLiPh::HK3_[] = {
MikamiUitOpen 12:f7bfe38c93ab 33 6.120216E-03f, -1.055827E-02f, 1.678651E-02f, -2.550498E-02f,
MikamiUitOpen 12:f7bfe38c93ab 34 3.802786E-02f, -5.727932E-02f, 9.144896E-02f, -1.751857E-01f,
MikamiUitOpen 12:f7bfe38c93ab 35 8.993316E-01f, 2.971602E-01f, -1.218529E-01f, 7.151836E-02f,
MikamiUitOpen 12:f7bfe38c93ab 36 -4.650688E-02f, 3.116614E-02f, -2.077330E-02f, 1.341366E-02f,
MikamiUitOpen 12:f7bfe38c93ab 37 -8.146596E-03f, 4.431256E-03f};
MikamiUitOpen 12:f7bfe38c93ab 38 }