Hann function
Mathematical function used in signal processing / From Wikipedia, the free encyclopedia
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The Hann function is named after the Austrian meteorologist Julius von Hann. It is a window function used to perform Hann smoothing.[1] The function, with length and amplitude is given by:
For digital signal processing, the function is sampled symmetrically (with spacing and amplitude ):
which is a sequence of samples, and can be even or odd. (see § Hann and Hamming windows) It is also known as the raised cosine window, Hann filter, von Hann window, etc.[2][3]