Minimax-Robust Filtering and Finite-Length Robust Predictors

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This paper consists basically of two parts. In the first part (Sections 2 and 3) , we consider some aspects of linear filtering under uncertainty about the spectral features of the relevant time series. The second part (Sections 4 and 5), considers a time domain approach to the general problem of filtering under probabilistic uncertainty and applies this general formulation to aspects of the linear filtering problem. Each of these approaches represents a different means for solving the minimax robust filtering problem, and both are applied to the specific problem of robust q-step prediction to illustrate the similarities of the two approaches.