Performance Study on RF Pattern Matching Positioning with Additional Inter-RAT Measurements

LI Yijie; CUI Jie; LI Anjian; CHANG Yongyu; ZHANG Xin; SANG Lin

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Performance Study on RF Pattern Matching Positioning with Additional Inter-RAT Measurements

LI Yijie 1 #,CUI Jie 2,LI Anjian 2,CHANG Yongyu 1,ZHANG Xin 1,SANG Lin 1 *

1.School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, 100876

2.Beijing Institute, Huawei Technologies Co., Ltd,

*Correspondence author

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Funding: none

Opened online:11 November 2015

Accepted by: none

Citation: LI Yijie,CUI Jie,LI Anjian.Performance Study on RF Pattern Matching Positioning with Additional Inter-RAT Measurements[OL]. [11 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4659368

In this paper, a new positioning method is proposed. Radio Frequency Pattern Matching (RFPM), also known as fingerprinting, is a positioning method proposed in the 3rd Generation Partnership Project (3GPP) RAN4 meetings for UE positioning. The localization accuracy of RFPM is highly related with the number of measurement elements for pattern matching. Using inter-RAT measurements not only adds additional measurements but also introduces the measurements from different radio access technologies (RAT). As these RATs may have a significantly different interference environment than that of the Long Term Evolution (LTE) network, the positioning geometry can be improved. In this paper, the inter-RAT elements are adopted to improve the positioning accuracy of RFPM, and the Cramer-Rao lower bound is deduced to evaluate the accuracy. By combining inter-RAT measurements with the existed RFPM method, the simulation results revealed an improved accuracy of the proposed method by more than 30% compared to only using one RAT measurements. The results are promising and show a great potential to improve the RFPM positioning performance with the help of additional inter-RAT measurements.

Keywords:RFPM; inter-RAT; Cramer-Rao; LTE

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