Time-delayed State Estimator for Linear Systems with Unknown Inputs

@inproceedings{Jin2005TimedelayedSE,
  title={Time-delayed State Estimator for Linear Systems with Unknown Inputs},
  author={Jae-Hyun Jin and Min-jea Tahk},
  year={2005}
}
This paper deals with the state estimation of linear time-invariant discrete systems with unknown inputs. The forward sequences of the output are treated as additional outputs. In this case, the rank condition for designing the unknown input estimator is relaxed. The gain for minimal estimation error variance is presented, and a numerical example is given to verify the proposed unknown input estimator. 

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