A ROM ARCHITECTURE BASED LOOK-UP-TABLE DESIGN AND MEMORY-BASED IMPLEMENTATION OF FIR DIGITAL FILTER
V. Vijaya, G. Laxmaiah · 2014
Finite-Impulse response (FIR) digital filter is widely used as a basic tool in various signal processing and image processing applications. New approaches to LUT-based-multiplication are suggested to reduce the LUT-size over that of conventional design. Distributed arithmetic (DA)-based computation is popular for its potential for efficient memory-based implementation of finite impulse response (FIR) filter where the filter outputs are computed as inner-product of input-sample vectors and filter-coefficient vector. In a ROM architecture based LUT design we are using a ROM of 9 words. We have synthesized the proposed LUT-multiplier and ROM based LUT-multiplier for 4-bit input word. Keywords—Digital signal processing (DSP) chip, distributed arithmetic, FIR filter, LUT-based computing, memory-based computing, VLSI.