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In this second part of the paper the Wigner distribution is adapted to the case of discrete-time signals. It is shown that most of the properties of this time-frequency signal representation carry over directly to the discrete-time case, but some.others cause problems. These problems are associated with the fact that in general the Wigner distribution of a… (More)

- Theo A. C. M. Claasen
- IEEE Micro
- 2003

- Niek A. M. Verhoeckx, Theo A. C. M. Claasen
- IEEE Trans. Communications
- 1984

- Gerard F. M. Beenker, Theo A. C. M. Claasen, Piet J. van Gerwen
- IEEE Trans. Communications
- 1985

- Augustus J. E. M. Janssen, Theo A. C. M. Claasen
- IEEE Trans. Acoustics, Speech, and Signal…
- 1985

This correspondence addresses the problem of how to regard the fuhdamental impossibility with time-frequency energy distributions of Cohen’s class always to be nonnegative and, at the same time, to have correct marginal distributions. It is shown that the Wigner distribution is the only member of a large class of bilinear time-frequency distributions that… (More)

- Theo A. C. M. Claasen
- Proceedings of the IEEE
- 2006

| In fast-moving consumer electronics markets where product lifetimes may be measured in months rather than years, fast time-to-market development of the system-onchip solutions that lie at the heart of these products has become critical to commercial success. New semiconductor process technologies have the potential to integrate ever greater functional… (More)

We have presented an adaptive algorithm similar to both the signerror and NLMS adaptive algorithms that is capable of reducing the geomagnetic noise present in magnetic anomaly detection systems. Through both theory and application of this algorithm to actual MAD flight data, we have proven this algorithm’s insensitivity to transients in the desired… (More)

- Robert J. Sluyter, H. J. Kotmans, Theo A. C. M. Claasen
- ICASSP
- 1982

R. J. Sluyter, H,J.Kotmans, T.A.C.M.Claasen Philips Research laboratories Eindhoven, The Netherlands. 2.1 Spectral analysis Continued investigations on the harmonic—sieve pitch extractor have led to several major improvements, such as e.g. even less frequent occurrence of pitch errors, especially for speech with low pitch, and extreme robustness with… (More)