DocumentCode :
2293515
Title :
On the Cramer-Rao bound of multiple sources localization using RDOAs and GROAs in the presence of sensor location uncertainties
Author :
Hao, Benjian ; Li, Zan ; Ren, Yunmei ; Yin, Weiyi
Author_Institution :
State Key Lab. of Integrated Services Networks, Xidian Univ., Xi´´an, China
fYear :
2012
fDate :
1-4 April 2012
Firstpage :
3117
Lastpage :
3122
Abstract :
Passive source localization has been the focus of considerable research efforts due to its usefulness in various applications. This paper performs a fundamental investigation of whether the gain ratios of arrival (GROAs) can be utilized in conjunction with the range differences of arrival (RDOAs) to improve the multiple sources localization accuracy in the presence of sensor location uncertainties. In this paper, we derive the Cramer-Rao lower bound (CRLB) of multiple source location estimate using both RDOAs and GROAs when sensor positions have errors. Simulations show that the localization accuracy improvements contributed by GROA measurements are significant for two far-field sources, two near-field sources and two enclosed sources as the SNR, jamming signal bandwidth factor C/ωo or sensor position error power σs2 increases. The CRLB will provide reasonable reference for localization algorithm research in the future.
Keywords :
jamming; time-of-arrival estimation; wireless sensor networks; CRLB; Cramer-Rao bound; Cramer-Rao lower bound; GROA measurements; RDOA; SNR; enclosed sources; far-field sources; fundamental investigation; gain ratios of arrival; jamming signal bandwidth factor; localization accuracy improvements; localization algorithm research; multiple source location estimate; multiple sources localization accuracy; near-field sources; passive source localization; range differences of arrival; reasonable reference; sensor location uncertainty; sensor position error power; sensor positions; Accuracy; Bandwidth; Jamming; Position measurement; Signal to noise ratio; Vectors; Cramer-Rao lower bound (CRLB); Gain Ratios of Arrival (GROAs); Range Differences of Arrival (RDOAs); multiple sources localization; sensor location uncertainties;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communications and Networking Conference (WCNC), 2012 IEEE
Conference_Location :
Shanghai
ISSN :
1525-3511
Print_ISBN :
978-1-4673-0436-8
Type :
conf
DOI :
10.1109/WCNC.2012.6214341
Filename :
6214341
Link To Document :
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