Design And Performance of Finite impulse Response Filter Using Hyperbolic Cosine Window

In this paper a proposed of design and analysis of Finite impulse response filter using Hyperbolic Cosine window (Cosh window for short). This window is very useful for some applications such as beam forming, filter design, and speech processing. Digital FIR filter designed by Kaiser window has a better far-end stop-band attenuation than filter designed by the other previously well known adjustable windows such as Dolph-Chebyshev and Saramaki, which are special cases of Ultraspherical windows, but obtaining a digital filter which performs higher far-end stop band attenuation than Kaiser window will be useful. In this paper, the design of nonrecursive digital FIR filter has been proposed by using Cosh window. It provides better side lobe roll-off ratio & farend stop band attenuation than filter designed by well known Kaiser window, which is the advantage of filter designed by Cosh window over filter designed by Kaiser window. An expression for the side lobe & far field level has been developed. Simulation & experimental results showing a good agreement with theory has been provided