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A novel OTDOA positioning scheme in Heterogeneous LTE-Advanced systems

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4 Author(s)
Tao Zhang ; Sch. of Inf. & Commun. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China ; Dengkun Xiao ; Jie Cui ; Xinlong Luo

The Observed Time Difference of Arrival (OTDOA) as a major positioning method in 3rd Generation Partnership Project (3GPP) specification has been deeply researched in Long Term Evolution Advanced (LTE-A) system. This paper analyzes the new interference scenarios in Heterogeneous Network (Het-Net) and the drawbacks of conventional OTDOA method which are caused by LPN (Low Power Nodes) deployed in Het-Net. In this paper, we propose a Time division multiplex (TDM) and a Code division multiplex (CDM) scheme for positioning reference signal (PRS) transmitting to solve these problems in Het-Net. Simulation results show that the proposed scheme can greatly improve the positioning accuracy compared with the conventional method and its performance meets the Federal communication commission (FCC) requirement.

Published in:

Network Infrastructure and Digital Content (IC-NIDC), 2012 3rd IEEE International Conference on

Date of Conference:

21-23 Sept. 2012