TY - JOUR
AU - Luz, M.M.
AU - Moklyachuk, M.P.
PY - 2022/06/13
Y2 - 2024/05/24
TI - Robust interpolation of sequences with periodically stationary multiplicative seasonal increments
JF - Carpathian Mathematical Publications
JA - Carpathian Math. Publ.
VL - 14
IS - 1
SE - Scientific articles
DO - 10.15330/cmp.14.1.105-126
UR - https://journals.pnu.edu.ua/index.php/cmp/article/view/5029
SP - 105-126
AB - <p>We consider stochastic sequences with periodically stationary generalized multiple increments of fractional order which combines cyclostationary, multi-seasonal, integrated and fractionally integrated patterns. We solve the interpolation problem for linear functionals constructed from unobserved values of a stochastic sequence of this type based on observations of the sequence with a periodically stationary noise sequence. For sequences with known matrices of spectral densities, we obtain formulas for calculating values of the mean square errors and the spectral characteristics of the optimal interpolation of the functionals. Formulas that determine the least favorable spectral densities and the minimax (robust) spectral characteristics of the optimal linear interpolation of the functionals are proposed in the case where spectral densities of the sequences are not exactly known while some sets of admissible spectral densities are given.</p>
ER -