tailieunhanh - Báo cáo hóa học: " Research Article Ultra-Wideband Geo-Regioning: A Novel Clustering and Localization Technique"

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 Ultra-Wideband Geo-Regioning: A Novel Clustering and Localization Technique | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 296937 13 pages doi 2008 296937 Research Article Ultra-Wideband Geo-Regioning A Novel Clustering and Localization Technique Christoph Steiner 1 Frank Althaus 2 Florian Troesch 1 and Armin Wittneben1 1 Communication Technology Laboratory Department of Information Technology and Electrical Engineering ETH Zurich CH-8092 Zurich Switzerland 2 International Electronics Engineering IEE . L-5326 Contern Luxembourg Correspondence should be addressed to Christoph Steiner steinech@ Received 1 March 2007 Revised 19 July 2007 Accepted 17 October 2007 Recommended by Sinan Gezici Ultra-wideband UWB technology enables a high temporal resolution of the propagation channel. Consequently a channel impulse response between transmitter and receiver can be interpreted as signature for their relative positions. If the position of the receiver is known the channel impulse response indicates the position of the transmitter and vice versa. This work introduces UWB geo-regioning as a clustering and localization method based on channel impulse response fingerprinting develops a theoretical framework for performance analysis and evaluates this approach by means of performance results based on measured channel impulse responses. Complexity issues are discussed and performance dependencies on signal-to-noise ratio a priori knowledge observation window and system bandwidth are investigated. Copyright 2008 Christoph Steiner et al. 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 Ultra-wideband UWB technology is characterized by relative bandwidths larger than 20 and absolute bandwidths of more than 500 MHz. These wide bandwidths improve the reliability of communications systems through frequency