© 1989 by Institute of Mathematics and its Applications
Linear Filtering for Time-Delay Systems
Department of Electrical Engineering, University of Port Harcourt East-West Road, CHOBA, P. M.B. 5323, Port Harcourt, Nigeria
Department of Electrical Engineering, Imperial College Exhibition Road, London SW7 2BT, England
A linear filtering problem is studied in which the signal process (x(t):t
0) is described by a stochastic differential equation where time delays are present in both the noise input and the x variable. By means of a transformation new to the filtering literature, we reduce the signal equation to a delay-free stochastic evolution equation; this permits us to solve the problem by application of the theory of infinite-dimensional linear filtering.