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— An H∞ control problem with simultaneous consideration of preview and delay is solved, where past signals and future signals are essential to describe behaviors of the control system. Solvability conditions and complete controller parameterization are derived in the frequency domain within the scope of finite dimensional computations, that is, infinite… (More)

- Yohei Kuroiwa
- CDC
- 2007

- Yohei Kuroiwa
- 2009

In this paper, a property of Schur polynomial of real coecients and real Toeplitz matrix is given. Suppose that the vector of real coecients of a Schur polynomial annihilates a real Toeplitz matrix, then the Toeplitz matrix is in fact a zero matrix.

- Yohei Kuroiwa
- 2011 8th International Conference on Information…
- 2011

The existence and uniqueness of the solution to the second-order interpolation problem is proved in terms of topological degree theory.

- Yohei Kuroiwa
- 2009 17th European Signal Processing Conference
- 2009

For a given partial covariance sequence (C<sub>0</sub>, C<sub>1</sub>, ..., C<sub>n</sub>) and for each MA part of the ARMA modeling filter of degree n, an AR part of the ARMA modeling filter of degree n for the solution to the rational covariance extension problem is obtained by solving a nonlinear equation, which is homotopic to a nonlinear equation… (More)

- Yohei Kuroiwa
- 2008

This thesis is a collection of papers about generalizations and applications of the theory of the analytic interpolation with complexity constraint by C. I. Byrnes, T. T. Georgiou and A. Lindquist. The first paper is about a generalization to the bi-tangential interpolation problem. A smooth and complete parameterization of interpolants is given by solving… (More)

- Yohei Kuroiwa
- 2009 17th European Signal Processing Conference
- 2009

The state-space realization of the multivariable rational interpolant with bounded McMillan degree is given by the block discrete-time Schwarz form. A characterization of the positive realness of the block discrete-time Schwarz form is given by a linear matrix inequality.

- Yohei Kuroiwa
- 2011 8th International Conference on Information…
- 2011

We introduce a coordinate-dependent characteristic of symmetry, which is denoted by C/A. C/A is defined by the division of the covariance (C) by the area (A) of the object of the image. The characteristic has the good properties for the applications to the image processing. We compute the characteristic of ellipse, for which we derive the formula of the… (More)

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