Multiplier-free FIR filters with periodically time-varying ternary coefficients

Author

Ghanekar, Sachin P. ; Tantaratana, Sawasd ; Franks, Lewis E.

Author_Institution

Dept. of Electr. & Comput. Eng., Massachusetts Univ., Amherst, MA, USA

fYear

1991

fDate

4-6 Nov 1991

Firstpage

1037

Abstract

A multiplier-free realization for FIR (finite impulse response) filters is proposed. The realization uses a periodically time-varying (PTV) system, preceded and followed by an upsampler and a downsampler, respectively, to achieve time-invariant operation. The PTV system uses only ternary coefficients. With an upsampling ratio of 3 to 5, one can achieve coefficient precision of 9 to 25 bits, which is sufficient for most applications. The implementation requires only add/subtract operations with a few shift-and-add operations at the input and output of the PTV system

Keywords

digital arithmetic; digital filters; time-varying networks; FIR filters; add/subtract operations; coefficient precision; downsampler; multiplier-free realization; periodically time-varying ternary coefficients; shift-and-add operations; time-invariant operation; upsampler; upsampling ratio; Delta-sigma modulation; Digital filters; Filter bank; Finite impulse response filter; Hardware; Nonlinear filters; Periodic structures; Switches; Time varying systems; Very large scale integration;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 1991. 1991 Conference Record of the Twenty-Fifth Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

0-8186-2470-1

Type

conf

DOI

10.1109/ACSSC.1991.186604

Filename

186604