DocumentCode :
2337764
Title :
Parallel PN code acquisition for wireless positioning in CDMA handsets
Author :
De Angelis, Guido ; Baruffa, Giuseppe ; Cacopardi, Saverio
Author_Institution :
Dept. of Electron. & Inf. Eng. (DIEI), Univ. of Perugia, Perugia, Italy
fYear :
2010
fDate :
13-15 Sept. 2010
Firstpage :
343
Lastpage :
348
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).
Keywords :
cellular radio; code division multiple access; direction-of-arrival estimation; mobile handsets; pseudonoise codes; telecommunication standards; time-of-arrival estimation; CDMA handsets; Enhanced 911; IS-95 cellular standard; TDOA; base stations; cross-correlation technique; false alarm events; frequency offsets; mobile station; parallel PN code acquisition; time-difference-of-arrival; wireless positioning; Correlation; Mobile communication; Multiaccess communication; Noise; Position measurement; Synchronization; Wireless communication; Acquisition; E911; IS-95; TDOA; Wireless Positioning;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Advanced satellite multimedia systems conference (asma) and the 11th signal processing for space communications workshop (spsc), 2010 5th
Conference_Location :
Cagliari
Print_ISBN :
978-1-4244-6831-7
Electronic_ISBN :
978-1-4244-6832-4
Type :
conf
DOI :
10.1109/ASMS-SPSC.2010.5586895
Filename :
5586895
Link To Document :
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