Assisted GNSS in LTE-Advanced Networks and its Application to Vector Tracking Loops

Carles Fernandez-Prades, Pau Closas, Jordi Vila'Valls, Marta Figueroa Naharro, Albert Torne Sanjose

Abstract:	This paper describes the positioning protocols provided by Long Term Evolution (LTE) networks, making special emphasis on existing and forthcoming standards for Assisted Global Navigation Satellite Systems (A-GNSS) data, mainly aimed to shorten the time-to-first-fix of the user receiver. The novelty of this work consists in proposing the usage of such information to enhance the performance of Vector Tracking Loops (VTL) in the user’s mobile terminal. Realistic simulations show improvements in terms of coverage, availability and accuracy with respect to receivers that also implement VTL but do not explicitly exploit A-GNSS data, or use it only to accelerate acquisition.
Published in:	Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012) September 17 - 21, 2012 Nashville Convention Center, Nashville, Tennessee Nashville, TN
Pages:	1462 - 1476
Cite this article:	Fernandez-Prades, Carles, Closas, Pau, Vila'Valls, Jordi, Naharro, Marta Figueroa, Sanjose, Albert Torne, "Assisted GNSS in LTE-Advanced Networks and its Application to Vector Tracking Loops," Proceedings of the 25th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2012), Nashville, TN, September 2012, pp. 1462-1476.
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