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

Blocks

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 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

Topics

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™.

DSP System Toolbox Documentation Get trial now