Parallel PN Code Acquisition Strategy for Location-Aware Mobile Handsets

Publication Type  Conference Paper
Year of Publication  2010
Authors  De_Angelis, G.; Baruffa, G.; Cacopardi, S.
Conference Name  Fifth Advanced Satellite Mobile Systems Conference and Eleventh Signal Processing for Space Communications Workshop
Pagination  343-348
Conference Start Date  September 2010
Conference Location  Cagliari, Italy
ISBN Number  978-1-4244-6831-7
Accession Number  11558846
Other Numbers  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  10.1109/ASMS-SPSC.2010.5586895
Citation Key  679
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