FIR FILTER DESIGN IN VLSI?

FIR FILTER:

Digital filtering is a ubiquitous operation in digital signal processing (DSP) applications and is realized using infinite impulse response (IIR) or finite impulse response (FIR) filters. Although an FIR filter requires a larger number of coefficients than an equivalent IIR filter, it is preferred to the IIR filter due to its stability and phase linearity properties. The computation of the output of an -tap FIR filter is given by

                             

where N is the filter length,hi is the th filter coefficient, and x(n-i) is the th previous filter input. The straightforward realization of (1) is depicted in Fig. which is known as the direct form.Alternatively, the realization of (1) in the transposed form is shown in Fig. 1(b).

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