Performance Enhancement of Multiuser Time Reversal UWB Communication System

Ijaz Haider Naqvi (1) , Ali Khaleghi (1, 2) , Ghaïs El Zein (3)

1 IETR - Institut d'Electronique et de Télécommunications de Rennes
2 SUPELEC-Campus Gif
3 IETR - Institut d'Électronique et des Technologies du numéRique

UWB communication is a recent research area for indoor propagation channels. Time Reversal (TR) communication in UWB has shown promising results for improving the system performance. In multiuser environment, the system performance is significantly degraded due to the interference among different users. TR reduces the interference caused by multiusers due to its spatial focusing property. The performance of a multiuser TR communication system is further improved if the TR filter is modified. In this paper, multiuser TR in UWB communication is investigated using simple TR filter and a modified TR filter with circular shift operation. The concept of circular shift in TR is analytically studied. Thereafter, the channel impulse responses (CIR) of a typical indoor laboratory environment are measured. The measured CIRs are used to analyze the received signal peak power and signal to interference ratio (SIR) with and without performing the circular shift operation in a multiuser environment.

Mots clés: ultra wide band; Multiuser; time reversal technique; signal to interference ratio; interference reduction; ultra wide band.

Domaines: Réseaux et télécommunications [cs.NI]; Electronique

Ijaz Haider Naqvi, Ali Khaleghi, Ghaïs El Zein. Performance Enhancement of Multiuser Time Reversal UWB Communication System. IEEE International Symposium on Wireless Communication Systems 2007, Oct 2007, Trondheim, Norway. pp.567-571, ⟨10.1109/ISWCS.2007.4392404⟩. ⟨hal-00327076⟩