Complexity-aware design of a DA-based FIR filters

Author

Chen, Chih-Chao ; Lin, Tay-Jyi ; Liu, Chih-Wei ; Jen, Chein-Wei

Author_Institution

Dept. of Electron. Eng., Nat. Chiao Tung Univ.

Volume

1

fYear

2004

fDate

6-9 Dec. 2004

Firstpage

445

Abstract

This paper presents a novel technique to reduce the area of the hardwired lookup table (LUT) of DA-based FIR filters. It explores the optimal quantization on the real-valued LUT with optimal global scaling and error distribution, and we apply an effective error measure to estimate the quantization error on the FIR coefficients. Our approach enables designers to explicitly trade the quality for simple implementations at finer granularity than that solely by reducing the coefficient wordlengths. Moreover, in our simulations, the proposed method can save 30%-40% silicon area of conventional DA-based FIR filters under identical error constraints

Keywords

FIR filters; table lookup; DA-based FIR filters; FIR coefficients; coefficient wordlengths; complexity-aware design; error distribution; error measure; hardwired lookup table; optimal global scaling; optimal quantization; quantization error; real-valued LUT; silicon area; Arithmetic; Digital filters; Finite impulse response filter; Hardware; Quantization; Read only memory; Signal design; Silicon; Table lookup; Very large scale integration;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2004. Proceedings. The 2004 IEEE Asia-Pacific Conference on

Conference_Location

Tainan

Print_ISBN

0-7803-8660-4

Type

conf

DOI

10.1109/APCCAS.2004.1412792

Filename

1412792