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- Tomas McKelvey, Hüseyin Akçay, Lennart Ljung
- Automatica
- 1996

- Hüseyin Akçay, Brett Ninness
- Signal Processing
- 1999

This paper studies continuous-time system model sets that are spanned by "xed pole orthonormal bases. The nature of these bases is such as to generalise the well-known Laguerre and two-parameter Kautz bases. The contribution of the paper is to establish that the obtained model sets are complete in all of the Hardy spaces H p (P), 1(p(R, and the right half… (More)

- Hüseyin Akçay
- Automatica
- 2011

In this paper, we revisit the problem of identifying multi-input/multi-output linear-time-invariant discrete-time systems from measured power spectrum data on uniform grids of frequencies studied by Van Overschee, De Moor, Dehandschutter, and Swevers (1997). We show that the algorithm proposed by these authors is not consistent. Then, we propose an… (More)

- Hüseyin Akçay, Brett Ninness
- Automatica
- 1998

This paper investigates the use of general bases with fixed poles for the purposes of robust estimation. These bases, which generalise the common FIR, Laguerre and two–parameter Kautz ones, are shown to be fundamental in the disc algebra provided a very mild condition on the choice of poles is satisfied. It is also shown, that by using a min–max criterion,… (More)

- Hüseyin Akçay, Semiha Türkay
- Automatica
- 2004

Identification of multi-input/multi-output systems from a measured power spectrum arises in certain applications; for example, the design of shaping filters for noise processes. A practical application is the modeling of stochastic road disturbances experienced by a vehicle moving forward. Model road spectrum by a rational transfer function of reasonably… (More)

- Hüseyin Akçay, Nuray At
- Signal Processing
- 2006

- Hüseyin Akçay
- IEEE Transactions on Signal Processing
- 2008

In this paper, fractional orthonormal basis functions that generalize the well-known fixed pole rational basis functions are synthesized. For a range of noninteger differentiation orders and under mild restrictions on the choice of the basis poles, the synthesized basis functions are shown to be complete in the space of functions which are analytic on the… (More)

- Hüseyin Akçay
- Signal Processing
- 2014

- Hüseyin Akçay
- IEEE Trans. Automat. Contr.
- 2014

- Hüseyin Akçay
- ACC
- 2012