
Accession Number : AD0642727
Title : PREDICTION OF A NOISEDISTORTED, MULTIVARIATE, NONSTATIONARY SIGNAL.
Descriptive Note : Technical rept.,
Corporate Author : STANFORD UNIV CALIF DEPT OF STATISTICS
Personal Author(s) : Sobel,Eugene
Report Date : 31 OCT 1966
Pagination or Media Count : 22
Abstract : The paper represents a generalization of one of the main theoretical results of my Ph.D. thesis. The work is an outgrowth of work first begun by E. J. Hannan and a correct 'conjecture' by P. Whittle. The main theorem of this paper proves the existence of, and gives an explicit formula for, the asymptotic best linear predictor of a certain type of nonstationary multivariate time series from noise distorted observations. The nonstationarity arises from the fact that the signal satisfies a difference equation, which when considered as a polynomial, has only elementary divisors. The proof is accomplished by showing, through Hilbert space and harmonic analysis methods, that the generating function is a limit of the generating functions of the stationary analogue; that is, where the difference function has elementary divisors. Finally, it is shown that this asymptotic generating function exactly predicts null solutions to the difference equation. The proof is direct and due to E. J. Hannan.
Descriptors : (*MULTIVARIATE ANALYSIS, *SEQUENCES(MATHEMATICS)), MATHEMATICAL PREDICTION, HARMONIC ANALYSIS, INFORMATION THEORY
Subject Categories : Statistics and Probability
Distribution Statement : APPROVED FOR PUBLIC RELEASE