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変換

DCT、FFT、HDL FFT、HDL IFFT、IDCT、IFFT

System object

dsp.DCT(To be removed) Discrete cosine transform (DCT)
dsp.IDCT(To be removed) Inverse discrete cosine transform (IDCT)
dsp.FFTDiscrete Fourier transform
dsp.HDLIFFTInverse fast Fourier transform — optimized for HDL code generation
dsp.HDLFFTFast Fourier transform — optimized for HDL code generation
dsp.IFFTInverse discrete Fourier transform (IDFT)
dsp.ZoomFFT High-resolution FFT of a portion of a spectrum

ブロック

すべて展開する

Complex CepstrumCompute 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 FFTRecover time-domain signals by performing inverse short-time, fast Fourier transform (FFT)
Magnitude FFTCompute nonparametric estimate of spectrum using periodogram method
Real CepstrumCompute real cepstrum of input
Short-Time FFTNonparametric estimate of spectrum using short-time, fast Fourier transform (FFT) method
Zoom FFTHigh-resolution FFT of a portion of a spectrum
FFT HDL OptimizedComputes fast-fourier-transform (FFT) and generates optimized HDL code
IFFT HDL OptimizedHDL コードの生成用に最適化された逆フーリエ高速変換
DCTDiscrete cosine transform (DCT) of input
DWTDiscrete wavelet transform (DWT) of input or decompose signals into subbands with smaller bandwidths and slower sample rates
IDCTInverse discrete cosine transform (IDCT) of input
IDWTInverse discrete wavelet transform (IDWT) of input or reconstruct signals from subbands with smaller bandwidths and slower sample rates

トピック

Transform Time-Domain Data into Frequency Domain

This example shows how to transform time-domain data into the frequency domain using the FFT block.

Transform Frequency-Domain Data into Time Domain

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

Linear and Bit-Reversed Output Order

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

Delay and Latency

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

Variable-Size Signal Support DSP System Objects

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