TAILIEUCHUNG - Báo cáo sinh học: " Research Article Shooter Localization in Wireless Microphone Networks"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Research Article Shooter Localization in Wireless Microphone Networks | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 690732 11 pages doi 2010 690732 Research Article Shooter Localization in Wireless Microphone Networks David Lindgren 1 Olof Wilsson 2 Fredrik Gustafsson EURASIP Member 2 and Hans Habberstad1 1 Swedish Defence Research Agency FOI Department of Information Systems Division of Informatics 581 11 Linkoping Sweden 2Linkoping University Department of Electrical Engineering Division of Automatic Control 581 83 Linkoping Sweden Correspondence should be addressed to David Lindgren Received 31 July 2009 Accepted 14 June 2010 Academic Editor Patrick Naylor Copyright 2010 David Lindgren 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. Shooter localization in a wireless network of microphones is studied. Both the acoustic muzzle blast MB from the gunfire and the ballistic shock wave SW from the bullet can be detected by the microphones and considered as measurements. The MB measurements give rise to a standard sensor network problem similar to time difference of arrivals in cellular phone networks and the localization accuracy is good provided that the sensors are well synchronized compared to the MB detection accuracy. The detection times of the SW depend on both shooter position and aiming angle and may provide additional information beside the shooter location but again this requires good synchronization. We analyze the approach to base the estimation on the time difference of MB and SW at each sensor which becomes insensitive to synchronization inaccuracies. Cramer-Rao lower bound analysis indicates how a lower bound of the root mean square error depends on the synchronization error for the MB and the MB-SW difference respectively. The estimation problem is formulated in a .

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