The h coefficients are scaled cross-covariances between the time series and the innovations. This function computes estimates for h using as input the observed series, a series of estimated innovations, and an estimate of the variance of the innovations.
pc.hat.h(x, eps, maxlag, si2hat)A matrix of the coefficient up to lag maxlag with one row for each season.
the observed time series x(t)
a series of esimated innovations
maximum lag
estimate of the variance of the innovations
Georgi N. Boshnakov
If missing, the variance of the innovations is estimated from eps.
boshnakov1996pcarmapcts