Paper Title
An Improved Modified Coefficient Decimation Method to Realize Low Complexity Reconfigurable Fir Filters for Cognitive Radio
Abstract
Designing a low complexity reconfigurable finite impulse response (FIR) filters is a crucial task in signal
processing. The coefficient decimation method (CDM) has been recently suggested as the most efficient method for
designing finite impulse response (FIR) filters with flexible frequency responses. In this paper, an improved modified
coefficient decimation method (IMCDM) is proposed to enhance the flexibility of convention MCDM in realizing FIR filters
with different pass-band locations. Computer simulation results show that the multi-band frequency response obtained using
IMCDM improves the frequency resolution as that of the conventional method (MCDM). Furthermore, the IMCDM method
realizes FIR filters with higher stop-band attenuation than the filters obtained using the MCDM technique. A simulation
result of the proposed method indicates 6.3 % reduction in number of multiplication when compared to MCDM. The
advantage of our proposed technique for realizing reconfigurable FIR filter is discussed.