Open AccessNON-TAYLOR SERIES BASED POSITIONING METHOD FOR LOCATION BASED SERVICES
Author(s) -
Tan Kim Geok,
Ahmed Wasif Reza,
San Choy Liew
Publication year - 2008
Publication title -
journal of ict
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.217
H-Index - 10
eISSN - 2180-3862
pISSN - 1675-414X
DOI - 10.32890/jict.7.2008.8079
Subject(s) - taylor series , global positioning system , hybrid positioning system , computer science , precise point positioning , position (finance) , gnss applications , series (stratigraphy) , location based service , positioning system , real time computing , telecommunications , mathematics , mathematical analysis , paleontology , geometry , point (geometry) , finance , economics , biology
Location Based Services (LBS) has gained increasing popularity in major cities. Due to blocking from man-made structures, the existing Global Positioning System (GPS) could not satisfy LBS applications, especially in street canyon and indoor surroundings. This has lead to the development of Assisted GPS (A-GPS) which can provide better service availability and accuracy gain. In the conventional positioning method, Taylor series expansion is applied to solve non-linear distance equations. This method requires an initial estimation of A-GPS receiver’s position. This paper investigates the positioning method for LBS based on hybrid E-OTD/GNSS. The proposed positioning method is non-Taylor series based. Therefore, it involves less complicated mathematical expansion and substitution. A flexible LBS positioning tool is developed which can generate position information in convenient way. It supports both Taylor series and non-Taylor series based positioning methods. The obtained results showed that the proposed non-Taylor series based positioning method can achieve better positioning accuracy.