Comparison of Different Techniques to Design an Efficient FIR Digital Filter

Digital filters are commonly used as an essential element of everyday electronics such as radios, cell phones, and stereo receivers. Digital filters may be more expensive than an equivalent analog filter due to their increased complexity, but they may lead to many designs which are impractical or impossible as analog filters. Basically there are two types of digital filters, which are FIR (Finite Impulse Response) and IIR (Infinite Impulse Response). FIR filters are highly desirable in digital filter design because of their inherent stability and linear phase. FIR filters have higher order than IIR filters for same magnitude response, when narrow transition band characteristics are required [1]. In this paper authors have compared their work with the techniques given by R. Mahesh and A.P. Vinod [6] & Z. U. Sheikh [7]. The proposed design by the authors reduce the power consumption of Digital Filter, making it more efficient. Keywords— FIR filter, Linear phase, Design techniques, coefficient.