Title :
Stability of two-dimensional discrete systems with periodic coefficients
Author :
Bose, Tamal ; Chen, Mei-Qin ; Joo, Kyung Sub ; Xu, Guo-Fang
Author_Institution :
Dept. of Electr. Eng., Colorado Univ., Denver, CO, USA
fDate :
7/1/1998 12:00:00 AM
Abstract :
Two-dimensional (2-D) discrete systems with periodic coefficients are considered for stability. These systems are called periodically shift variant (PSV) digital filters and have many applications in signal processing that include the filtering of 2-D signals with cyclostationary noise, scrambling of digital images, and implementation of multirate filter banks. In this paper, the filters are formulated in the form of the well known Fornasini-Marchesini state-space model with periodic coefficients. This PSV model is then studied for stability. Two sufficient conditions and one necessary condition are established for asymptotic stability. Some examples are given to illustrate the results
Keywords :
asymptotic stability; circuit stability; discrete systems; state-space methods; two-dimensional digital filters; Fornasini-Marchesini state-space model; asymptotic stability; cyclostationary noise; digital image scrambling; multirate filter bank; periodic coefficients; periodically shift variant digital filter; signal processing; stability; two-dimensional discrete system; Digital filters; Digital images; Digital signal processing; Filter bank; Filtering; Signal processing; Stability; Statistics; Sufficient conditions; Two dimensional displays;
Journal_Title :
Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on
