Analysis of downlink location methods for WCDMA and cdma2000

Author

Wang, S. S Peter ; Green, Marilynn ; Malkawi, Maged

Author_Institution

Nokia Res. Center, Irving, TX, USA

Volume

4

fYear

2001

fDate

2001

Firstpage

2580

Abstract

A simulation tool for studying the downlink trilateration method of a MS (mobile station) location in CDMA and TDMA systems has been developed. The primary function of this simulator is to determine the location accuracy in various situations (such as in urban, suburban and rural propagation environments) and to investigate various means of reducing the positioning errors. This tool simulates the signal received by the MS from the surrounding BSs (base stations), which is processed to obtain the TOA (time of arrival) or TDOA (time delay of arrival) estimate and then transmitted to the location estimator unit. The location estimator unit computes an estimate of the MS location. The simulator allows the testing of various methods and location estimators in several typical environments. We present the location accuracy and implementation complexity for WCDMA and cdma2000 systems. The WCDMA simulator is based on ARIB and ETSI WCDMA specifications and utilizes the IP-DL (idle period-downlink) algorithm. On the other hand, cdma2000 simulator is based on the TIA AFLT (advanced forward-link trilateration) specifications

Keywords

code division multiple access; mobile radio; parameter estimation; time division multiple access; ARIB specifications; ETSI specifications; TDMA; TIA specifications; W-CDMA; advanced forward-link trilateration; cdma2000; downlink location methods; idle period-downlink algorithm; location accuracy; location estimator unit; mobile station location; positioning error reduction; rural propagation environments; suburban propagation environments; time delay of arrival estimation; time of arrival estimation; urban propagation environments; Base stations; Computational modeling; Delay effects; Delay estimation; Downlink; Multiaccess communication; Signal processing; Telecommunication standards; Testing; Time division multiple access;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Spring. IEEE VTS 53rd

Conference_Location

Rhodes

ISSN

1090-3038

Print_ISBN

0-7803-6728-6

Type

conf

DOI

10.1109/VETECS.2001.944067

Filename

944067