Title :
A novel OTDOA positioning scheme in Heterogeneous LTE-Advanced systems
Author :
Tao Zhang ; Dengkun Xiao ; Jie Cui ; Xinlong Luo
Author_Institution :
Sch. of Inf. & Commun. Eng., Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
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.
Keywords :
3G mobile communication; Long Term Evolution; code division multiplexing; direction-of-arrival estimation; radiofrequency interference; time division multiplexing; time-of-arrival estimation; 3GPP specification; 3rd generation partnership project specification; CDM scheme; FCC; Federal communication commission; Het-Net; LPN; LTE-A system; Long Term Evolution advanced system; OTDOA positioning scheme; PRS; TDM scheme; code division multiplex scheme; heterogeneous LTE-advanced systems; heterogeneous network; interference scenarios; low power nodes; observed time-difference-of-arrival estimation; positioning reference signal; time division multiplex scheme; Accuracy; Antennas; FCC; Indexes; Interference; OFDM; Time division multiplexing; CDM; Het-Net; OTDOA; PRS; TDM;
Conference_Titel :
Network Infrastructure and Digital Content (IC-NIDC), 2012 3rd IEEE International Conference on
Conference_Location :
Beijing
Print_ISBN :
978-1-4673-2201-0
DOI :
10.1109/ICNIDC.2012.6418722
