A synthesis tool for the multiplierless realization of FIR-based multirate DSP systems

In this study, a synthesis tool using a novel multirate folding technique, which handles each FIR filter in a multirate DSP system as a single node, is developed. A new architecture is presented for the multiplierless realization of a fold of multirate FIR filters. This synthesizer fully exploits the redundancies (i.e. “idle” and “missing” cycles) and common terms in multirate systems without sacrificing overall system quality to produce multiplierless multirate systems, It also enables the usage of a single clock for all parts of the circuit