Summary
Asia-Pacific Conference on Communications
2015
Session Number:14-AM2-B
Session:
Number:14-AM2-B-2
A Practical 3-Dimensional Positioning Algorithm for 3GPP LTE System
Kyunghoon Lee, Wonjun Hwang, Hyung-Jin Choi,
pp.6-11
Publication Date:2015/10/14
Online ISSN:2188-5079
DOI:10.34385/proc.28.14-AM2-B-2
Summary:
Mobile positioning enhancement has been an attractive standards issue to support high-quality location based services (LBS) in 3rd generation partnership project (3GPP) long term evolution (LTE) system. Especially for urban canyon environment with lots of tall skyscrapers, the necessity of 3-dimensional (3D) positioning has been raised to measure the altitude of user; however, the traditional method in LTE, time difference of arrival (TDOA) based positioning, only can estimate the horizontal position of user, not the vertical position of user in rectangular coordinate system. Several TDOA based methods for 3D positioning have been studied for decades; however, they still have practical limitations to be utilized in LTE. Therefore, in this paper, we propose a practical 3D positioning method based on 2D TDOA per each coordinate plane. Also, in order to improve the performance of 2D TDOA, we propose a new hyperbola equation derivation which provides more accurate 2D hyperbola equations by using pre-measured position information (PPI). In addition, we propose iterative TDOA algorithm which can provide PPI among 2D TDOAs. We verify that the proposed method can perform accurate 3D positioning with practical implementation.