Low Area and High Speed Reconfigurable FIR Filters For Software Defined Radio

Abstract

In this paper we present a Low Area and High Speed Reconfigurable Finite Impulse Response (RFIR) Filter for Software Defined Radio (SDR) applications. The recent trend in communication demands an effective data transmission and wireless communication is effectively equipped for long distances. SDR is appropriate for such communication systems. The recent trends of SDR fascinate the researches principally for effective resource management.  One of the most computational intensive parts of the wideband receiver of a software defined radio is Intermediate Frequency (IF) processing block. Digital FIR filter is an important element of the IF block. Hence FIR filter has to be reconfigured aptly for applications with low power low area and high speed apart from noise minimization for such applications. Traditional methods are employed for accurate data transfer, low noise signal communication. But the design complexity of RFIR filters increases by adder and multiplier blocks. Therefore we propose a new method of implementing RFIR filters with less number of adders to reduce the complexity of architecture by making use of Approximate Adder (AA) and Distributed Arithmetic (DA) technique to encode the filter coefficients .The proposed architecture results in less area and low power consumption than that of traditional filters