Keywords: FIR filters, Hamming window, Blackman window Hanning window, Matlab. Why add a Hamming window What is windowing In signal processing, it can be said that windowing is a necessary process, because our computer can only. This research paper offers a Matlab-based low-pass FIR digital filter that uses Hamming window functions. First, the signal is pre-emphasized, which changes the tilt or slope of the spectrum to increase the energy of higher frequencies. This type of filter is important for analyzing the different types of signals that are essential in a world where digital filters play a major role in DSP applications. Advantages of Blackman Window over Hamming Window Method for designing FIR Filter. However, in terms of transition bandwidth (О”П‰), the Hamming window has a narrower bandwidth than the Blackman window, making it more appropriate to use in this FIR filter design. The output of the FIR design by Blackman window and the Rectangular. Among the other three widow functions that can be used, the Blackman window function is closest to the Hamming window function in terms of minimum bandstop attenuation/decibel, since both have a dB value greater than -50. Since the Hamming window cannot reach zero for any choice of samples of the defining raised cosine, it makes. 46cos (2pi (0:M-1)'/ (M-1)) Note that M-1 is used in the denominator rather than M+1 as in the Hann window case. Although there are various window functions such as the Blackman window function, the Hanning window function and the rectangular window functions that can be used as digital filters, the Hamming window function was used in this study for the reason of its minimum damping/decibel of the stopband with a reduced transition bandwidth. In matlab, a length Hamming window is designed by the statement. The reduction and filtering of the input components of an original signal in one or more frequency bands using a finite impulse response, better known as FIR, is designed using a function of the Hamming window. Although there are various window functions such as the Blackman window function, the Hanning window function and the rectangular window functions that can.