Comparisons of error characteristics between TOA and TDOA positioning

Author

Shin, Dong-Ho ; Sung, Tae-Kyung

Author_Institution

Dept. of Electr. Eng., Chungnam Nat. Univ., Taejon, South Korea

Volume

38

Issue

1

fYear

2002

fDate

1/1/2002 12:00:00 AM

Firstpage

307

Lastpage

311

Abstract

This paper presents a comparison of error characteristics between time of arrival (TOA) and time difference of arrival (TDOA) processing of the linearized GPS pseudo-range equations. In particular, the relationship among dilutions of precision (DOPs), position estimates, and their error covariances is investigated. DOPs for TDOA are defined using the error covariance matrix resulting from TDOA processing. It is shown that the DOPs and user position estimate are the same for TDOA and TOA processing. The relationship of DOPs and position estimates for standard GPS positioning and double differenced processing are also given

Keywords

Global Positioning System; covariance matrices; measurement errors; signal processing; GPS navigation system; dilution of precision; double differenced processing; error characteristics; error covariance matrix; position estimate; time difference of arrival positioning; time of arrival positioning; Covariance matrix; Difference equations; Global Positioning System; Least squares methods; Position measurement; Radio navigation; Satellite broadcasting; Time difference of arrival; Time measurement; Transmitters;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/7.993253

Filename

993253