CLA Formula Aided Fast Architecture Design for Clustered Look-Ahead Pipelined IIR Digital Filter

Abstract

In VLSI design domain, Clustered Look-Ahead (CLA) technique is a promising method to further pipeline or accelerate IIR digital filters in the coming era of 5G network for mobile devices. However, much efforts are needed to acquire the stable CLA pipelined architecture. Therefore, this paper proposes a CLA Formula to aid the fast architecture design for CLA pipelined IIR digital filters. To obtain the stable architecture with the pipeline stage ranging from 6 to 96, comparison experiments show that when compared to the symbolic method with substitution, the proposed CLA Formula aided method can save more than half the software coding time for designers and reduce almost 168$\sim$30243 times the execution time for the programs.