Mohamed Zekri | IEPSCF - Academia.edu (original) (raw)
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Papers by Mohamed Zekri
IMTC 2001. Proceedings of the 18th IEEE Instrumentation and Measurement Technology Conference. Rediscovering Measurement in the Age of Informatics (Cat. No.01CH 37188), 2000
A new physical model 'VUB1' is proposed to characterize a metallic parallel wire or twisted wire ... more A new physical model 'VUB1' is proposed to characterize a metallic parallel wire or twisted wire pair. The VUB1 model will be compared with a rational function in the sdomain and with the popular physical model 'BT0' of British Telecom as described in the standards for Metallic Acces Networks. The VUB model contains a limited parameter set and is linear and time invariant there were the models used in the standards use more parameters and are semi-empirical, which can lead to non-causal systems. Metallic cable characterization with physical models will be compared with rational functions in the Laplace-domain. A Maximum Likelihood Estimation framework is used in the frequency domain to identify the model parameters. The performance of the models will be compared with a simulation directly based on measurements.
Proceedings IEEE International Symposium on Computers and Communications (Cat. No.PR00250), 1999
Abstract This contribution proposes a new family of methods to reduce the peak-to-average power r... more Abstract This contribution proposes a new family of methods to reduce the peak-to-average power ratio (PAR) in discrete multi-tone (DMT) and orthogonal frequency division multiplexing (OFDM) systems. This method avoids the use of extra inverse fast Fourier ...
IEEE Journal on Selected Areas in Communications, 2002
IMTC 2001. Proceedings of the 18th IEEE Instrumentation and Measurement Technology Conference. Rediscovering Measurement in the Age of Informatics (Cat. No.01CH 37188), 2000
A new physical model 'VUB1' is proposed to characterize a metallic parallel wire or twisted wire ... more A new physical model 'VUB1' is proposed to characterize a metallic parallel wire or twisted wire pair. The VUB1 model will be compared with a rational function in the sdomain and with the popular physical model 'BT0' of British Telecom as described in the standards for Metallic Acces Networks. The VUB model contains a limited parameter set and is linear and time invariant there were the models used in the standards use more parameters and are semi-empirical, which can lead to non-causal systems. Metallic cable characterization with physical models will be compared with rational functions in the Laplace-domain. A Maximum Likelihood Estimation framework is used in the frequency domain to identify the model parameters. The performance of the models will be compared with a simulation directly based on measurements.
Proceedings IEEE International Symposium on Computers and Communications (Cat. No.PR00250), 1999
Abstract This contribution proposes a new family of methods to reduce the peak-to-average power r... more Abstract This contribution proposes a new family of methods to reduce the peak-to-average power ratio (PAR) in discrete multi-tone (DMT) and orthogonal frequency division multiplexing (OFDM) systems. This method avoids the use of extra inverse fast Fourier ...
IEEE Journal on Selected Areas in Communications, 2002