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It is well known that appropriately biasing an estimator can potentially lead to a lower mean square error (MSE) than the achievable MSE within the class of unbiased estimators. Nevertheless, the choice of an appropriate bias is generally unclear and only recently there have been attempts to systematize such a selection. These systematic approaches aim at introducing MSE bounds that are lower than...
This note furthers existing results on the model reduction of stable periodic systems. It utilizes for that matter a lifting technique to potentially attain less conservative error bounds.
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