Hamming window

Figure 6. Range-Doppler correlation function, Hamming window, integration time ti = 0.05s.

Once the width of the analysis window for a particular frame has been specified, the pitch-adaptive Hamming window w (n) is computed and normalized according to... 

Savitsky-Golay Filters, Hanning and Hamming Windows... 

Several odier MA methods have been proposed in die literature, two of die best known being die Hanning window (named after Julius Von Hann) (which for 3 points has weights 0.25, 0.5 and 0.25), and the Hamming window (named after R. W. Hamming) (which for 5 points has weights 0.0357, 0.2411, 0.4464, 0.2411, 0.0357) - not to be confused in name but very similar in effects. These windows can be calculated for any size, but we recommend diese two filter sizes. 

Figure 1 Two-pulse or primary ESEEM data collected for the type-1 Cu(II) site of the Fet3p enzyme. Figure 1(a) shows the time domain data recorded under the following conditions microwave frequency, 9.6883 GHz field strength, 337.0 mT pulse power, 250 W 90° pulse length, 16 ns full width at half maximum (FWHM) sample temperature, 10 K. Figure 1(b) shows the ESEEM spectrum derived from the data of Figure 1(a) by subtraction of a biexponential decay function, application of a Hamming window function, and Fast Fourier Transformation (FFT). The absolute value spectrum is displayed...

Three common windows are the rectangular window, banning window and hamming window ... 

Figure 12.1 Effects of windowing in the time domain (a) rectangular window, (b) banning window and (c) hamming window.

There are several other linear filters such as Hanning and Hamming windows which can be found in specialist spectroscopic texts. Often, for historic reasons, users of specific spectroscopic techniques have employed particular named filters. 

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