Open AccessDesign of high‐speed, low‐power, and area‐efficient FIR filters
Author(s) -
Liacha Ahmed,
Oudjida Abdelkrim K.,
Ferguene Farid,
Bakiri Mohammed,
Berrandjia Mohamed L.
Publication year - 2018
Publication title -
iet circuits, devices and systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.251
H-Index - 49
eISSN - 1751-8598
pISSN - 1751-858X
DOI - 10.1049/iet-cds.2017.0058
Subject(s) - adder , radix (gastropod) , overhead (engineering) , computer science , benchmark (surveying) , finite impulse response , parallel computing , heuristics , heuristic , cmos , algorithm , power (physics) , arithmetic , mathematics , electronic engineering , mathematical optimization , engineering , physics , quantum mechanics , botany , geodesy , biology , geography , operating system
In a recent work, we have introduced a new multiple constant multiplication (MCM) algorithm, denoted as RADIX‐2 r . The latter exhibits the best results in speed and power, comparatively with the most prominent algorithms. In this paper, the area aspect of RADIX‐2 r is more specially investigated. RADIX‐2 r is confronted to area efficient algorithms, notably to the cumulative benefit heuristic (Hcub) known for its lowest adder‐cost. A number of benchmark FIR filters of growing complexity served for comparison. The results showed that RADIX‐2 r is better than Hcub in area, especially for high order filters where the saving ranges from 1.50% up to 3.46%. This advantage is analytically proved and experimentally confirmed using a 65nm CMOS technology. Area efficiency is achieved along with important savings in speed and power, ranging from 6.37% up to 38.01% and from 9.30% up to 25.85%, respectively. When MCM blocks are implemented alone, the savings are higher: 10.18%, 47.24%, and 41.27% in area, speed, and power, respectively. Most importantly, we prove that MCM heuristics using similar addition pattern (A‐operation with the same shift spans) as Hcub yield excessive bit‐adder overhead in MCM problems of high complexity. As such, they are not competitive to RADIX‐2 r in high order filters.