Power-Efficient and Cost-Effective 2-D Symmetry Filter Architectures

• Main Authors: Chen, Pei-Yu, 陳姵妤
• Other Authors: Van, Lan-Da
• Format: Others
• Language: en_US
• Published: 2018
• Online Access: http://ndltd.ncl.edu.tw/handle/c7uh73

博士 === 國立交通大學 === 資訊科學與工程研究所 === 106 === In this dissertation, two-dimensional (2-D) VLSI digital filter architectures possessing various symmetries in the filter magnitude response are studied for the first time. For this purpose, Type-1, Type-2, and Type-3 power-efficient and cost-effective 2-D magnitude symmetry filter architectures possessing diagonal, four-fold rotational, quadrantal, and octagonal symmetries with reduced number of multipliers are given. For each Type (1-3), four structures incorporating each of the above symmetries are presented. In all 12 single symmetry structures are studied. Further, two power-efficient and cost-effective multimode 2-D symmetry filters are given. By combining the identities of four each of the Type-1 and Type-3 symmetry filter structures, the proposed Type-1 and Type-3 multimode 2-D symmetry filters can provide four different operation modes: diagonal symmetry mode (DSM), four-fold rotational symmetry mode (FRSM), quadrantal symmetry mode (QSM), and octagonal symmetry mode (OSM). Besides, the symmetry filter architectures using delta operator are also proposed for better numerical accuracy and lower coefficient sensitivity in narrow-band filter designs. According to ASIC implementation flow, Synopsys Design Compiler is employed to synthesize the Type-1 2-D filter designs in RTL level and Cadence SOC Encounter is adopted for placement and routing (P&R) in TSMC 0.18um. The power dissipation implementation result is measured via Synopsys PrimePower. The Type-1 diagonal, four-fold rotational, quadrantal, and octagonal symmetry filter structures can attain power savings of 16.77%, 36.30%, 22.90%, and 37.73% with respect to that of the conventional 2-D filter design without symmetry. On the other hand, the Type-1 DSM, FRSM, QSM, and OSM modes can reduce power consumption by 11.01%, 31.42%, 17.53%, and 35.26% compared with that of the conventional 2-D filter design. The Type-1 multimode filter can result in 63.25% area reduction compared with the sum of the areas of the four individual Type-1 symmetry filter structures. Besides, we also provide Type-2 and Type-3 symmetry filter architectures with different structures and shorter critical paths.