Automatic location identification using a hybrid technique

Author

Yost, George P. ; Panchapakesan, Shankari

Author_Institution

Wireless Eng. Technol., Ericsson Inc., Richardson, TX, USA

Volume

1

fYear

1998

fDate

18-21 May 1998

Firstpage

264

Abstract

Automatic location indication (ALI) has been mandated by the US Federal Communications Commission (FCC) for the use of Public Safety Answering Points (PSAPs) and other users, by late 2001. We analyze a hybrid approach which uses combination of time difference of arrival (TDOA) and independent time of arrival (TOA) information to supplement each other. Both pieces of information are available with no hardware modifications to currently-available handsets and relatively inexpensive alterations to the base station system. We obtain significantly reduced statistical errors compared with either technique separately. This reduction may be necessary for compliance with the FCC requirement. In addition, there is expected to be a reduction in the measurement bias. The technique has particular advantages in the large areas on the periphery of the central coverage regions

Keywords

cellular radio; land mobile radio; radionavigation; safety; ALI; FCC; Federal Communications Commission; PSAP; Public Safety Answering Points; TDOA; TOA; USA; automatic location identification; cellular phone service providers; central coverage regions; handsets; hybrid technique; independent time of arrival; measurement bias reduction; statistical errors; time difference of arrival; Antenna measurements; Base stations; Cellular phones; FCC; Global Positioning System; Information analysis; Safety; Telephone sets; Time difference of arrival; Time measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 1998. VTC 98. 48th IEEE

Conference_Location

Ottawa, Ont.

ISSN

1090-3038

Print_ISBN

0-7803-4320-4

Type

conf

DOI

10.1109/VETEC.1998.686576

Filename

686576