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New First - Path Detector for LTE Positioning Reference Signals

Authors:
Paweł Gadka

Keywords: RSTD; LTE; OTDOA; PRS

Abstract:
In today's world, where positioning applications reached a huge popularity and became virtually ubiquitous, there is a strong need for determining a device location as accurately as possible. A particularly important role in positioning play cellular networks, such as Long Term Evolution (LTE). In the LTE Observed Time Difference of Arrival (OTDOA) positioning method, precision of device location estimation depends on accuracy of the Positioning Reference Signal (PRS) first-path detection, what is particularly challenging in multipath environment. There are a few algorithms, available in the literature, that are dedicated to detect the first-path of PRS signals, often basing on estimation of the strongest path, or which do not adapt to continuously changing environmental conditions. The paper presents a new algorithm, called First-Path Estimator (FPE), which detects the first path of received PRS signal in the LTE system. Simulations showed that proposed algorithm reduces Received Signal Time Difference (RSTD) measurement error compared to the well-known Maximum Likelihood Estimator (MLE) in urban scenario.

Pages: 99 to 104

Copyright: Copyright (c) IARIA, 2014

Publication date: August 24, 2014

Published in: conference

ISSN: 2308-4278

ISBN: 978-1-61208-353-7

Location: Rome, Italy

Dates: from August 24, 2014 to August 28, 2014