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Parallel PN code acquisition strategy for location-aware mobile handsets

Publication type	Conference paper
Year of publication	2010
Authors	Guido De Angelis, Giuseppe Baruffa, and Saverio Cacopardi
Title	Parallel PN code acquisition strategy for location-aware mobile handsets
Conference name	Fifth Advanced Satellite Mobile Systems Conference and Eleventh Signal Processing for Space Communications Workshop
Volume
Issue
Pages	343–348
Editor
Publisher	IEEE
Date	September 2010
Place	Cagliari, Italy
ISSN number
ISBN number	978-1-4244-6831-7, 978-1-4244-6832-4
Key words	TDOA, Acquisition, Wireless Positioning, IS-95, E911
Abstract	This paper proposes a simplified acquisition system for finding and identifying Base Stations (BSs) in visibility in the framework of a CDMA wireless positioning system, based on IS-95 cellular standard. The problem of having more than one BS in the same PN code acquisition system makes it necessary to discriminate between correct detection and false alarm events. Since IS-95 uses the same PN sequence for all BSs, but with different code offsets, it is possible to use a cross-correlation technique to estimate both code and frequency offsets of several BSs at once. Time-Difference-Of-Arrival (TDOA) technique is used by the Mobile Station (MS) to geolocate itself. The positioning estimate is found to be stable in time and with a precision compatible with that required by emergency services, such as Enhanced 911 (E911).
URL	http://ieeexplore.ieee.org/search/srchabstract.jsp?tp=&arnumber=5586895
DOI	http://dx.doi.org/10.1109/ASMS-SPSC.2010.5586895
Other information
Paper	(portable document format, 340456 Bytes)