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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 Localization Accuracy of Track-before-Detect Search Strategies for Distributed Sensor Networks | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2008 Article ID 264638 15 pages doi 10.1155 2008 264638 Research Article Localization Accuracy of Track-before-Detect Search Strategies for Distributed Sensor Networks Thomas A. Wettergren and Michael J. Walsh Naval Undersea Warfare Center 1176 Howell Street Newport RI02841 USA Correspondence should be addressed to Thomas A. Wettergren t.a.wettergren@ieee.org Received 22 March 2007 Revised 29 June 2007 Accepted 30 August 2007 Recommended by Frank Ehlers The localization accuracy of a track-before-detect search for a target moving across a distributed sensor field is examined in this paper. The localization accuracy of the search is defined in terms of the area of intersection of the spatial-temporal sensor coverage regions as seen from the perspective of the target. The expected value and variance of this area are derived for sensors distributed randomly according to an arbitrary distribution function. These expressions provide an important design objective for use in the planning of distributed sensor fields. Several examples are provided that experimentally validate the analytical results. Copyright 2008 T. A. Wettergren and M. J. Walsh. 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 Advances in miniaturization electronics and communications have made the use of sensor networks a popular choice for providing surveillance coverage in diverse application areas. Much of the current emphasis is on improved detection classification and localization of a single point in the surveillance region. However recently the use of a set of sensors that are geometrically distributed over a large area has been proposed as a cost-effective approach for tracking moving targets through surveillance regions see e.g. 1-3 .
