Transforms

DCT, FFT, HDL FFT, HDL IFFT, IDCT, IFFT

Objects

`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	Fast Fourier transform (FFT) of input
IFFT	Inverse fast Fourier transform (IFFT) of input
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	Computes inverse-fast-fourier-transform and generates optimized HDL code

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

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

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™.