CQ出版社セミナ,2021/12/07開催「実習・C++言語によるArmマイコンのプログラミング」で使うプログラム.
Dependencies: Array_Matrix mbed SerialTxRxIntr UIT_FFT_Real
IIR_Filter/Coefs_IIR8_LP_8k_Biquad.hpp@5:5e55a5f440c0, 2020-04-02 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Thu Apr 02 01:12:34 2020 +0000
- Revision:
- 5:5e55a5f440c0
- Parent:
- IIR_Filter/Coefs_IIR6_LP_8k_Biquad.hpp@0:a80f730d32a8
6
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
MikamiUitOpen | 0:a80f730d32a8 | 1 | //----------------------------------------------------- |
MikamiUitOpen | 0:a80f730d32a8 | 2 | // 縦続形 IIR フィルタの次数と係数の定義 |
MikamiUitOpen | 0:a80f730d32a8 | 3 | // |
MikamiUitOpen | 0:a80f730d32a8 | 4 | // 2019/11/14, Copyright (c) 2019 MIKAMI, Naoki |
MikamiUitOpen | 0:a80f730d32a8 | 5 | //----------------------------------------------------- |
MikamiUitOpen | 0:a80f730d32a8 | 6 | |
MikamiUitOpen | 0:a80f730d32a8 | 7 | #include "Biquad.hpp" |
MikamiUitOpen | 0:a80f730d32a8 | 8 | |
MikamiUitOpen | 0:a80f730d32a8 | 9 | // 低域通過フィルタ |
MikamiUitOpen | 0:a80f730d32a8 | 10 | // 連立チェビシェフ特性 |
MikamiUitOpen | 0:a80f730d32a8 | 11 | // 次数 : 8 次 |
MikamiUitOpen | 0:a80f730d32a8 | 12 | // 標本化周波数:160.00 kHz |
MikamiUitOpen | 0:a80f730d32a8 | 13 | // 遮断周波数 : 8.00 kHz |
MikamiUitOpen | 0:a80f730d32a8 | 14 | // 通過域のリップル: 0.50 dB |
MikamiUitOpen | 0:a80f730d32a8 | 15 | // 阻止域の減衰量 :60.00 dB |
MikamiUitOpen | 0:a80f730d32a8 | 16 | const int ORDER_ = 8; |
MikamiUitOpen | 0:a80f730d32a8 | 17 | const Biquad CK_[] = { |
MikamiUitOpen | 0:a80f730d32a8 | 18 | Biquad(1.809727E+00f, -8.261113E-01f, -8.082254E-01f, 1.0E+00f), // 1段目 |
MikamiUitOpen | 0:a80f730d32a8 | 19 | Biquad(1.842528E+00f, -8.959587E-01f, -1.755464E+00f, 1.0E+00f), // 2段目 |
MikamiUitOpen | 0:a80f730d32a8 | 20 | Biquad(1.871837E+00f, -9.562537E-01f, -1.853590E+00f, 1.0E+00f), // 3段目 |
MikamiUitOpen | 0:a80f730d32a8 | 21 | Biquad(1.890836E+00f, -9.887843E-01f, -1.875058E+00f, 1.0E+00f)}; // 4段目 |
MikamiUitOpen | 0:a80f730d32a8 | 22 | const float G0_ = 1.281836E-03f; // 利得定数 |
MikamiUitOpen | 0:a80f730d32a8 | 23 |