Optimally Factored IFIR Filters
Alireza Mehrnia, Alan N. Willson · Circuits Systems and Signal Processing · 2018
This paper presents a new design method and a corresponding architecture for creating FIR filters that are significantly more hardware-efficient than presently known implementations. These optimally factored IFIR filters are also easily pipelined, thereby allowing operation at much higher data-rates. Using examples introduced by previous researchers, we show surprisingly better hardware efficiency. Two such examples show hardware reductions in the vicinity of 50%, relative to the conventional Remez structures, whereas previous research targeting this matter reports more modest results. We also show new features and further benefits that can be obtained by using optimally factored IFIR filters.