Reconfigurable band pass filter using Kaiser window for satellite communication

Abstract

Digital filters play a vital role in the era of digital communication system. Digital bandpass filter basically provide high attenuation to the unwanted frequency components in stop band and offer very low or ideally zero attenuation to desired signal components in passband when its impulse response is adjusted as per required specifications. The selection of an appropriate Field Programmable Gate Array(FPGA) device for implementation of an area efficient, cost effective and high speed Finite Impulse Response(FIR) bandpass filter is a challenging task. In this paper an FPGA based FIR band pass filter is designed with the help of Kaiser Window. The proposed filter is implemented on two FPGA devices Xilinx's Spartan-3E, xc3s500e-4fg320 and Virtex2p, xc2vp30-5ff896 and compared on the basis of Direct-form FIR and Direct-Form Symmetric FIR structure for hardware resource utilization as well as speed. The hardware result shows that the proposed FIR bandpass filter designed on virtex-2p with Direct Form Symmetric FIR structure uses 11.27% less LUTs, 7.35% less Slices as well as 13.44% faster than that designed on Spartan3E with Direct form FIR structure.