G. Pap, THE DISTRIBUTION OF ESTIMATES OF PARAMETERS OF MULTIDIMENSIONAL STATIONARY AR PROCESSES, Computers & mathematics with applications, 27(2), 1994, pp. 1-8
It is shown that the suitably normalized maximum likelihood estimates
of the parameters of periodical type of some multidimensional stationa
ry AR processes have exactly normal distribution. This provides a gene
ralization of the well-known behaviour of the estimate of period of a
complex 1-dimensional AR process (see [1-6]).