What is the 'periodic' sampling option in the HAMMING

Ximena asked: 2021-03-18 matlab , signal , signal processing , hamming

Understand the periodic sampling option in MATLABs HAMMING window function. Learn how it affects signal processing and spectral analysis. Click here to ex...

Expert Answer

Prashant Kumar answered . 2025-07-29 20:41:13

This enhancement has been incorporated in Release 2006b (R2006b). For previous product releases, read below for any possible workarounds:

Documentation on the HAMMING, HANN, BLACKMAN, and FLATTOPWIN function is missing information about the 'periodic' option. Here is some additional information:

The periodic flag is useful for DFT/FFT purposes such as in spectral analysis.

Because there is an implicit periodic extension in the DFT/FFT, the periodic flag enables a signal that is windowed with a periodic window to have perfect periodic extension. When using windows for spectral analysis or other DFT/FFT purposes, the periodic option can be useful. When using windows for filter design, the symmetric flag should be used.

Please refer to the following for more information:

Harris, F., "On the use of windows for harmonic analysis with the discrete Fourier transform" Proceedings of the IEEE , vol. 66, No. 1, January 1978.

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