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Low Pass FIR Filter Design and Analysis Using Hamming, Blackman and Kaiser Windows

Suhaib Ahmed, Mudasir Bashir, Ashish Suri

The recent advancements in the field of communication systems are challenging the engineers to design digital equipments as ubiquitous in various areas like power systems, audio applications, image processing, etc. Hence digital filters have to be improvised time-to-time to cope-up with different characteristics featured by the system while taking into consideration the accuracy, speed and stability issues arising due to growing variety and complexity of the conditions faced along the operation of the system. In this paper, low pass finite impulse response (FIR) filters are designed using the Hamming, Blackman and Kaiser Windows and their corresponding magnitude and phase responses are analysed at a given filter order and its cut-off frequency. It is shown that the degree of flatness of the transition band varies with order of the filter.