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変換

DCT、FFT、HDL FFT、HDL IFFT、IDCT、IFFT

オブジェクト

`dsp.FFT`	Discrete Fourier transform
`dsp.HDLIFFT`	Inverse fast Fourier transform — optimized for HDL code generation
`dsp.HDLFFT`	Fast Fourier transform — optimized for HDL code generation
`dsp.IFFT`	Inverse discrete Fourier transform (IDFT)
`dsp.ISTFT`	Inverse short-time FFT
`dsp.STFT`	Short-time FFT
`dsp.ZoomFFT`	High-resolution FFT of a portion of a spectrum

Complex Cepstrum	Compute complex cepstrum of input
FFT	入力の高速フーリエ変換 (FFT)
IFFT	入力の逆フーリエ高速変換 (IFFT)
Inverse Short-Time FFT	Recover time-domain signals by performing inverse short-time, fast Fourier transform (FFT)
Magnitude FFT	Compute nonparametric estimate of spectrum using periodogram method
Real Cepstrum	Compute real cepstrum of input
Short-Time FFT	Nonparametric estimate of spectrum using short-time, fast Fourier transform (FFT) method
Zoom FFT	High-resolution FFT of a portion of a spectrum

FFT HDL Optimized	Computes fast fourier transform (FFT) and generates optimized HDL code
IFFT HDL Optimized	逆フーリエ高速変換の計算と最適化された HDL コードの生成

DCT	Discrete cosine transform (DCT) of input
DWT	Discrete wavelet transform (DWT) of input or decompose signals into subbands with smaller bandwidths and slower sample rates
IDCT	Inverse discrete cosine transform (IDCT) of input
IDWT	Inverse discrete wavelet transform (IDWT) of input or reconstruct signals from subbands with smaller bandwidths and slower sample rates

この例では、FFT ブロックを使用して時間領域データを周波数領域に変換する方法について説明します。

When you want to transform frequency-domain data into the time domain, use the IFFT block.

Learn the meaning of linear and bit-reversed data order as used by the FFT and IFFT blocks

Configure the Simulink^® environment to minimize delay and increase simulation performance

List of System objects which support variable-sized signals in DSP System Toolbox™.