Timing and positioning of assisted-GPS receivers with rough time-tag

Guohui Gong; Sikun Li

doi:10.1117/12.658388

4 January 2006 Timing and positioning of assisted-GPS receivers with rough time-tag

Guohui Gong, Sikun Li

Proceedings Volume 5985, International Conference on Space Information Technology; 59854X (2006) https://doi.org/10.1117/12.658388
Event: International Conference on Space information Technology, 2005, Wuhan, China

Abstract

Precise timing is a significant issue for an assisted-GPS receiver, time-tag of better that 10 milliseconds accuracy has typically been a requirement, and a high speed wireless link is generally used to offer this time-tag. A method is proposed to determine position and correct local clock of an A-GPS receiver, using a coarse time-tag of 10 seconds accuracy. The method firstly measures ≥5 in-view satellites' C/A code phases, then searches along the time axis to find out the time point matching the measured C/A code phases mostly, and simultaneously determines the receiver position. In the following several hours, only 4 satellites are necessary for positioning, until the local clock error exceeds the permission. By this method, requirement of extra hardware or high speed wireless link is eliminated, thus effectively decreased the complexity and cost of the receiver and the wireless link.

Citation Download Citation

Guohui Gong and Sikun Li "Timing and positioning of assisted-GPS receivers with rough time-tag", Proc. SPIE 5985, International Conference on Space Information Technology, 59854X (4 January 2006); https://doi.org/10.1117/12.658388

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available