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Báo cáo hóa học: "Research Article Digital Receiver Design for Transmitted Reference Ultra-Wideband Systems"

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: Research Article Digital Receiver Design for Transmitted Reference Ultra-Wideband Systems | Hindawi Publishing Corporation EURASIP Journal on Wireless Communications and Networking Volume 2009 Article ID315264 17 pages doi 10.1155 2009 315264 Research Article Digital Receiver Design for Transmitted Reference Ultra-Wideband Systems Yiyin Wang Geert Leus and Alle-Jan van der Veen Faculty of Electrical Engineering Mathematicsand Computer Science EEMCS Delft University of Technology Mekelweg 4 2628 CD Delft The Netherlands Correspondence should be addressed to Yiyin Wang yiyin.wang@tudelft.nl Received 30 June 2008 Revised 6 November 2008 Accepted 1 February 2009 Recommended by Erdal Panayirci A complete detection channel estimation synchronization and equalization scheme for a transmitted reference TR ultra-wideband UWB system is proposed in this paper. The scheme is based on a data model which admits a moderate data rate and takes both the interframe interference IFI and the intersymbol interference ISI into consideration. Moreover the bias caused by the interpulse interference IPI in one frame is also taken into account. Based on the analysis of the stochastic properties of the received signals several detectors are studied and evaluated. Furthermore a data-aided two-stage synchronization strategy is proposed which obtains sample-level timing in the range of one symbol at the first stage and then pursues symbol-level synchronization by looking for the header at the second stage. Three channel estimators are derived to achieve joint channel and timing estimates for the first stage namely the linear minimum mean square error LMMSE estimator the least squares LS estimator and the matched filter MF . We check the performance of different combinations of channel estimation and equalization schemes and try to find the best combination that is the one providing a good tradeoff between complexity and performance. Copyright 2009 Yiyin Wang et al. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use