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.cpp@9:9f391b2d51be, 2020-12-06 (annotated)

Committer:
MikamiUitOpen
Date:
Sun Dec 06 07:21:23 2020 +0000
Revision:
9:9f391b2d51be
Parent:
8:356d0c5f97c3 
10

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:79c0b1e2fd10 1 //-------------------------------------------------------------------
MikamiUitOpen 3:59af3dfa0595 2 // デフォルトの補間用フィルタの係数
MikamiUitOpen 8:356d0c5f97c3 3 // この係数は，入力の標本化周波数を 10 kHz，
MikamiUitOpen 8:356d0c5f97c3 4 // 出力の標本化周波数を 40 kHz として設計した
MikamiUitOpen 0:79c0b1e2fd10 5 //
MikamiUitOpen 9:9f391b2d51be 6 // 2020/12/06, Copyright (c) 2020 MIKAMI, Naoki
MikamiUitOpen 0:79c0b1e2fd10 7 //-------------------------------------------------------------------
MikamiUitOpen 0:79c0b1e2fd10 8
MikamiUitOpen 0:79c0b1e2fd10 9 #include "MultirateLiPh.hpp"
MikamiUitOpen 0:79c0b1e2fd10 10
MikamiUitOpen 4:c233f2db4652 11 namespace Mikami
MikamiUitOpen 4:c233f2db4652 12 {
MikamiUitOpen 4:c233f2db4652 13 // 使用窓関数 Kaiser 窓
MikamiUitOpen 4:c233f2db4652 14 // 標本化周波数 (kHz) 40.000000
MikamiUitOpen 8:356d0c5f97c3 15 // 次数 70
MikamiUitOpen 4:c233f2db4652 16 // 種類 LPF
MikamiUitOpen 4:c233f2db4652 17 // 遮断周波数 (kHz) 5.000000
MikamiUitOpen 8:356d0c5f97c3 18 // 減衰量 (dB) 40.00
MikamiUitOpen 8:356d0c5f97c3 19 const int MultirateLiPh::ORDER_ = 70;
MikamiUitOpen 4:c233f2db4652 20 const float MultirateLiPh::HK1_[] = {
MikamiUitOpen 8:356d0c5f97c3 21 3.806160E-03f, -7.410556E-03f, 1.260559E-02f, -1.994242E-02f,
MikamiUitOpen 8:356d0c5f97c3 22 3.036776E-02f, -4.579744E-02f, 7.095016E-02f, -1.214690E-01f,
MikamiUitOpen 8:356d0c5f97c3 23 2.969901E-01f, 8.992744E-01f, -1.749060E-01f, 9.096828E-02f,
MikamiUitOpen 8:356d0c5f97c3 24 -5.663444E-02f, 3.726704E-02f, -2.468324E-02f, 1.596038E-02f,
MikamiUitOpen 8:356d0c5f97c3 25 -9.780624E-03f, 5.435560E-03f};
MikamiUitOpen 4:c233f2db4652 26 const float MultirateLiPh::HK2_[] = {
MikamiUitOpen 8:356d0c5f97c3 27 6.477720E-03f, -1.208128E-02f, 2.009782E-02f, -3.140681E-02f,
MikamiUitOpen 8:356d0c5f97c3 28 4.757964E-02f, -7.194132E-02f, 1.131902E-01f, -2.034948E-01f,
MikamiUitOpen 8:356d0c5f97c3 29 6.336764E-01f, 6.336764E-01f, -2.034948E-01f, 1.131902E-01f,
MikamiUitOpen 8:356d0c5f97c3 30 -7.194132E-02f, 4.757964E-02f, -3.140681E-02f, 2.009782E-02f,
MikamiUitOpen 8:356d0c5f97c3 31 -1.208128E-02f, 6.477720E-03f};
MikamiUitOpen 4:c233f2db4652 32 const float MultirateLiPh::HK3_[] = {
MikamiUitOpen 8:356d0c5f97c3 33 5.435560E-03f, -9.780624E-03f, 1.596038E-02f, -2.468324E-02f,
MikamiUitOpen 8:356d0c5f97c3 34 3.726704E-02f, -5.663444E-02f, 9.096828E-02f, -1.749060E-01f,
MikamiUitOpen 8:356d0c5f97c3 35 8.992744E-01f, 2.969901E-01f, -1.214690E-01f, 7.095016E-02f,
MikamiUitOpen 8:356d0c5f97c3 36 -4.579744E-02f, 3.036776E-02f, -1.994242E-02f, 1.260559E-02f,
MikamiUitOpen 8:356d0c5f97c3 37 -7.410556E-03f, 3.806160E-03f};
MikamiUitOpen 4:c233f2db4652 38 }