TITLE:
Simulation Based Design Analysis of an Adjustable Window Function
AUTHORS:
Orvila Sarker, Rezaul Huque Khan
KEYWORDS:
Finite Impulse Response Filter, Minimum Stopband Attenuation, Half Main-Lobe Width
JOURNAL NAME:
Journal of Signal and Information Processing,
Vol.7 No.4,
November
4,
2016
ABSTRACT: Window based Finite Impulse Response
filters have the problem that in order to obtain better performance from these
filters in terms of minimum stopband attenuation cost has to be paid for half
main-lobe width and vice-versa. A solution of this contradictory behavior is to
increase the length of the window which in turn requires more hardware hence
increasing the cost of system. This paper proposes a novel window based on two
shifted hyperbolic tangent functions. The proposed window contains an
adjustable parameter, with the help of which desired time and frequency domain
characteristics may be achieved for relatively shorter window length. The
characteristics of the proposed window are compared with those of the two
well-known adjustable windows namely Cosh window and Exponential window. MATLAB
simulation results show that for the same value of window length, the proposed
window provides improved output, and thus it makes a good compromise between
minimum stopband attenuation and half main-lobe width compared to the windows
mentioned previously.