Frequency Domain Multiuser Detectors for Ultra-Wideband Communications in Short-Range Systems

Conference: European Wireless 2005 - 11th European Wireless Conference 2005 - Next Generation wireless and Mobile Communications and Services
04/10/2006 - 04/13/2005 at Nicosia, Cyprus

Proceedings: European Wireless 2005

Pages: 9Language: englishTyp: PDF

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Morosi, Simone; Bianchi, Tiziano (Dipartimento di Elettronica e Telecomunicazioni, University of Florence, Via S. Marta 3, 50139, Firenze, Italy)

In this paper, we propose an original detection scheme for high rate short-range impulse radio ultra-wideband systems. The proposed receiver relies on both the introduction of the cyclic prefix at the transmitter and the use of a frequency domain multiuser detector at the receiver. Zero Forcing (ZF) and Minimum Mean Square Error (MMSE) detection strategies have been investigated and compared with the classical RAKE, considering a scenario where several mobile terminals communicate with a base station in an indoor environment characterized by severe multipath propagation. The results show that the MMSEreceiver achieves the best performance, irrespective of the number of active terminals, both in the up-link and in the down-link communications. Hence, the proposed approach is well suited in indoor wireless environments where the multipath propagation tends to increase the effects of both the inter-path and the inter-user interference.