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 Comparison of Semidistributed Multinode TOA-DOA Fusion Localization and GPS-Aided TOA (DOA) Fusion Localization for MANETs | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 439523 16 pages doi 2008 439523 Research Article Comparison of Semidistributed Multinode TOA-DOA Fusion Localization and GPS-Aided TOA DOA Fusion Localization for MANETs Zhonghai Wang and Seyed Zekavat Department of Electrical and Computer Engineering College of Engineering Michigan Technological University Houghton MI 49931 USA Correspondence should be addressed to Zhonghai Wang wzhongha@ Received 20 February 2008 Revised 30 July 2008 Accepted 6 October 2008 Recommended by Fredrik Gustafsson This paper evaluates the performance of a semidistributed multinode time-of-arrival TOA and direction-of-arrival DOA fusion localization technique in terms of localization circular error probability CEP . The localization technique is applicable in mobile ad hoc networks MANETs when global positioning system GPS is not available GPS denied environments . The localization CEP of the technique is derived theoretically and verified via simulations. In addition we theoretically derive the localization CEP of GPS-aided TOA fusion and GPS-aided DOA fusion techniques which are also applicable in MANETs. Finally we compare these three localization techniques theoretically and via simulations. The comparison confirms that in moderate scale MANETs the multinode TOA-DOA fusion localization technique achieves the best performance while in large scale MANETs GPS-aided TOA fusion leads to the best performance. Copyright 2008 Z. Wang and S. Zekavat. 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 Node localization is required in ad hoc networks to support resource allocation 1 routing 2 3 situation awareness 4 5 and so forth. Many coarse and fine localization techniques applicable in ad hoc networks
