FFT によるスペクトル解析器
Dependencies: Array_Matrix mbed SerialTxRxIntr UIT_FFT_Real DSP_ADDA
MyFFT_Analyzer/FFT_Analyzer.hpp@0:91cc5a03f0ca, 2021-01-08 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Fri Jan 08 02:27:46 2021 +0000
- Revision:
- 0:91cc5a03f0ca
1
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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MikamiUitOpen | 0:91cc5a03f0ca | 1 | //------------------------------------------------------- |
MikamiUitOpen | 0:91cc5a03f0ca | 2 | // FFT を使ってスペクトル解析を行うクラス(ヘッダ) |
MikamiUitOpen | 0:91cc5a03f0ca | 3 | // |
MikamiUitOpen | 0:91cc5a03f0ca | 4 | // 2020/11/07, Copyright (c) 2020 MIKAMI, Naoki |
MikamiUitOpen | 0:91cc5a03f0ca | 5 | //------------------------------------------------------- |
MikamiUitOpen | 0:91cc5a03f0ca | 6 | |
MikamiUitOpen | 0:91cc5a03f0ca | 7 | #ifndef FFT_ANALYZER_HPP |
MikamiUitOpen | 0:91cc5a03f0ca | 8 | #define FFT_ANALYZER_HPP |
MikamiUitOpen | 0:91cc5a03f0ca | 9 | |
MikamiUitOpen | 0:91cc5a03f0ca | 10 | #include "Array.hpp" |
MikamiUitOpen | 0:91cc5a03f0ca | 11 | #include "fftReal.hpp" |
MikamiUitOpen | 0:91cc5a03f0ca | 12 | #include "Blackman.hpp" |
MikamiUitOpen | 0:91cc5a03f0ca | 13 | |
MikamiUitOpen | 0:91cc5a03f0ca | 14 | namespace Mikami |
MikamiUitOpen | 0:91cc5a03f0ca | 15 | { |
MikamiUitOpen | 0:91cc5a03f0ca | 16 | class FftAnalyzer |
MikamiUitOpen | 0:91cc5a03f0ca | 17 | { |
MikamiUitOpen | 0:91cc5a03f0ca | 18 | public: |
MikamiUitOpen | 0:91cc5a03f0ca | 19 | // nFft: FFT のデータ点の数 |
MikamiUitOpen | 0:91cc5a03f0ca | 20 | FftAnalyzer(int nFft); |
MikamiUitOpen | 0:91cc5a03f0ca | 21 | virtual ~FftAnalyzer() {} |
MikamiUitOpen | 0:91cc5a03f0ca | 22 | void Execute(const Array<float> &xn, Array<float> &absFt); |
MikamiUitOpen | 0:91cc5a03f0ca | 23 | |
MikamiUitOpen | 0:91cc5a03f0ca | 24 | private: |
MikamiUitOpen | 0:91cc5a03f0ca | 25 | const int N_FFT_; |
MikamiUitOpen | 0:91cc5a03f0ca | 26 | |
MikamiUitOpen | 0:91cc5a03f0ca | 27 | FftReal fft_; |
MikamiUitOpen | 0:91cc5a03f0ca | 28 | BlackmanWindow wHm_; |
MikamiUitOpen | 0:91cc5a03f0ca | 29 | |
MikamiUitOpen | 0:91cc5a03f0ca | 30 | Array<float> xData_; // 解析対象の時系列データ |
MikamiUitOpen | 0:91cc5a03f0ca | 31 | Array<float> wData_; // 窓掛けされたデータ |
MikamiUitOpen | 0:91cc5a03f0ca | 32 | Array<Complex> yFft_; // FFT の結果 |
MikamiUitOpen | 0:91cc5a03f0ca | 33 | |
MikamiUitOpen | 0:91cc5a03f0ca | 34 | // コピー・コンストラクタおよび代入演算子の禁止のため |
MikamiUitOpen | 0:91cc5a03f0ca | 35 | FftAnalyzer(const FftAnalyzer& ); |
MikamiUitOpen | 0:91cc5a03f0ca | 36 | FftAnalyzer& operator=(const FftAnalyzer& ); |
MikamiUitOpen | 0:91cc5a03f0ca | 37 | }; |
MikamiUitOpen | 0:91cc5a03f0ca | 38 | } |
MikamiUitOpen | 0:91cc5a03f0ca | 39 | #endif // FFT_ANALYZER_HPP |