Computer Science – Networking and Internet Architecture
Scientific paper
2008-10-08
IEEE International Symposium on Wireless Communication Systems 2007, Trondheim : Norv\`ege (2007)
Computer Science
Networking and Internet Architecture
Scientific paper
10.1109/ISWCS.2007.4392404
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.
Khaleghi Ali
Naqvi Ijaz Haider
Zein Ghaïs El
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