tailieunhanh - Báo cáo hóa học: " Frequency Domain Detectors in Different Short-Range Ultra-Wideband Communication Scenarios"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Frequency Domain Detectors in Different Short-Range Ultra-Wideband Communication Scenarios | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2006 Article ID 26054 Pages 1-9 DOI WCN 2006 26054 Frequency Domain Detectors in Different Short-Range Ultra-Wideband Communication Scenarios Tiziano Bianchi and Simone Morosi Dipartimento di Elettronica e Telecomunicazioni Universita degli Studi di Firenze Via S. Marta 3 50139 Firenze Italy Received 2 September 2005 Revised 26 May 2006 Accepted 3 November 2006 We study the performance of an innovative communication scheme for ultra-wideband systems which are based on impulse radio in two different short-range communication scenarios the proposed system relies on both the introduction of the cyclic prefix at the transmitter and the use of a frequency domain detector at the receiver. Two different detection strategies based either on the zero forcing ZF or on the minimum mean square error MMSE criteria have been investigated and compared with the classical RAKE considering two scenarios where a base station transmits with a different data rate to several mobile terminals in an indoor environment characterized by severe multipath propagation. The results show that the MMSE receiver achieves a remarkable performance especially in the case of highly loaded high data-rate systems. Hence the proposed approach is well suited for high-throughput applications in indoor wireless environments where multipath propagation tends to increase the effects of the interference. Copyright 2006 T. Bianchi and S. Morosi. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. 1. INTRODUCTION Different applications can be foreseen for the impulse radio IR communications 1 based on the use of baseband pulses of very short duration typically on the order of a nanosecond 2 in particular low and high data-rate applications have been .

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