terminal-assisted positioning. To enhance positioning accuracy for all types of environment, LTE uses complementary positioning methods. The main location technologies used are Observed Time Difference of Arrival (OTDOA) and Assisted Global Navigation Satellite System (A-GNSS), due to the

23 Aug 2018 System (GNSS) and supports Observed Time Difference of Arrival (OTDOA), a positioning technique using cellular towers, for highly accurate 

Determining the measured radio source for an ambiguous cell may be used to improve the location estimate for user equipment (UE). OTDOA positioning accuracy is greatly impacted by both the RSTD measurement quality and the position estimation quality. That is to say, a system with a good RSTD measurement quality provided by the UE vendor but a poor position estimation provided by the location server However, an A-GPS positioning and an OTDOA positioning may be initiated in parallel. It is then only when the OTDOA method is the only successful method that the rest of the method 100 is performed. The primary reason for this is that a failure of A-GPS positioning and a success of OTDOA positioning indicates an indoor UE 12 location. LTE Mobile users positioning via OTDOA measurements: modeling and simulation May 2016 Conference: 9 ème édition Journées d’Optique et de Traitement de l’Information JOTIM'16 These positioning methods were chosen as they refer to the three hearability from at least three Node Bs. A simulation model for OTDOA based on the path loss model has been developed and is used to simulate data with fixed input parameters and the RSCP of Node Bs from field drive test.

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Today I will show you how to use Pozyx hardware with … GNSS) positioning, Observed Time Di fference of Arrival (OTDoA) positioning and Enhanced Cell ID (E-Cell ID) positioning. A-GNSS positioning is based on cellular network as sistance of GNSS r 2017-11-08 The 3GPP consortium responded to this need by enhancing its 4G communication standard (LTE) with positioning capabilities. In the adopted Observed Time Difference of Arrival (OTDOA) algorithm the base stations transmit so-called Positioning Reference Signals (PRS). PRS Muting Pattern Assignment to Optimize RSTD Measurement Acquisition for OTDOA Positioning in 3GPP LTE. Ramya Srinivasan, Grant A. Marshall, Guttorm R. Opshaug, Borislav Ristic, Kirk A. Burroughs, Sven Fischer, Shuping Zhang, Daniel Henriksson A, François Cardinal The measurements may be for an observed time of arrival difference (OTDOA) positioning method or an extended cell ID (ECID) positioning method. Determining the measured radio source for an ambiguous cell may be used to improve the location estimate for user equipment (UE). OTDOA positioning accuracy is greatly impacted by both the RSTD measurement quality and the position estimation quality.

3GPP are supporting two stand-alone TDOA positioning methods (downlink and uplink) in the LTE specification.

In TDOA‐based positioning, the E‐SMLC estimates the UE's position (x, y) by solving two hyperbola simultaneous equations that are based on two RSTD values, r (1,0) and r (2,0), and the 2D positions of three eNBs, including a serving eNB (eNB 0) and two neighboring eNBs (eNB 1, eNB 2), as described in Fig. 2. The RSTD values and the hyperbola simultaneous equations can be formulated as follows.

The e-cid technique improves this estimate by using measurements such as Round Trip Time (rtt) and Angle of Arrival (aoa). If many bss are in range, otdoa can give a position from combined Reference Signal Time Difference (rstd) mea-surements.

3 Feb 2015 (SDR) receiver is developed for OTDoA positioning in LTE. A preliminary scenario with four synchronized base stations is used to validate the 

The primary reason for this is that a failure of A-GPS positioning and a success of OTDOA positioning indicates an indoor UE 12 location. LTE Mobile users positioning via OTDOA measurements: modeling and simulation May 2016 Conference: 9 ème édition Journées d’Optique et de Traitement de l’Information JOTIM'16 These positioning methods were chosen as they refer to the three hearability from at least three Node Bs. A simulation model for OTDOA based on the path loss model has been developed and is used to simulate data with fixed input parameters and the RSCP of Node Bs from field drive test. Therefore, how to enhance positioning accuracy raises great awareness and related 5G numerology design is a hot topic. Considering the determinants such as ue complexity, standardization and net-work impacts, 3GPP Release 14 [2] puts the focus on enhancements of Observed Time Di↵erence of Arrival (OTDoA) positioning.

Considering the determinants such as ue complexity, standardization and net-work impacts, 3GPP Release 14 [2] puts the focus on enhancements of Observed Time Di↵erence of Arrival (OTDoA) positioning. OTDoA is a ue assisted mul- Fig. 1. Illustration of the OTDOA based positioning scheme.
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For example, [6] uses real measurements and investigates channel impacts on positioning accuracy. An error analysis of OTDOA is reported in [7]. We investigate opportunities for device tracking in NB-IoT systems using Observed Time Difference of Arrival (OTDOA) measurements.

In the adopted Observed Time Difference of Arrival (OTDOA) algorithm the base stations transmit so-called Positioning Reference Signals (PRS). The User Equipment (UE) detects the time difference of arrival of the PRS for pairs of base stations. terminal-assisted positioning.
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The OTDOA positioning method is illustrated in Figure 1-1, where the UE measures three TOA’s relative to the UE internal time base, τ 1, τ 2, and τ 3. The measurement from eNodeB 1 is selected as reference, and two OTDOA’s are formed: t 2,1 = τ 2 – τ 1 and t 3,1 = τ 3 – τ 1. eNB 1 eNB 2 eNB 3 t 3(t 1 t 2(t 1 Measurement0 u ncer tai y t 2 t 1 t 3

Bibliography 71. II Publications. A Performance of OTDOA positioning in NB-IoT Systems  Performance of OTDOA positioning in narrowband IoT systems. PIMRC 2017: 1- Gustafsson: Fusion of TOF and TDOA for 3GPP positioning. Siomina, Ari Kangas, Claes Tidestav: Enhanced WCDMA Fingerprinting Localization Using OTDOA Positioning Measurements from LTE. Improving the performance of OTDOA based positioning in NB-IoT systems. S Hu, A Berg, X Li, F Rusek. GLOBECOM 2017-2017 IEEE Global Communications  I worked on the thesis "Enhancements in LTE OTDOA Positioning for Multipath Environments" where I developed a novel method for indoor positioning.

in its most basic form returns the position of the serving cell in the network. The e-cid technique improves this estimate by using measurements such as Round Trip Time (rtt) and Angle of Arrival (aoa). If many bss are in range, otdoa can give a position from combined Reference Signal Time Difference (rstd) mea-surements.

For example, [6] uses real mea-surements and investigates channel impacts on position-ing accuracy. An error analysis of OTDOA is reported in [7]. Baseline performance based on 3GPP 3D MIMO of arrival (OTDOA) based positioning for Narrowband Internet of Things (NB-IoT), which will be integrated as a part of the 3rd Generation Partnership Project (3GPP) Long ermT Evolution TE) release 14. ARM Cordio-N IP for NB-IoT will provide the wide area and low power connectivity required for … Following are the applications of OTDOA: • It is used as positioning method in all the LTE enabled mobile phones. • It is used for E911 emergency services in the USA. • It is used for various commercial applications which include maps, location based advertising on the mobile as per interest of the users and search history.

As demonstrated in This positioning technique is known as Observed Time Difference of Arrival (OTDOA), because the device position can be obtained by measuring the time of arrival of multiple signals from multiple base-stations. Then device position can be estimated by measuring the difference between the time of arrivals. (OTDOA) is a downlink based positioning method de-scribed by 3GPP as one of the NB-IoT positioning methods to increase positioning accuracy. It utilizes neighbor cells to derive an observed time difference of arrival (ToA) rela-tive to the serving cell.