In order to achieve better and accurate positioning performance, downlink OTDOA is merged with A-GNSS. The transmission from eNBs (i.e. Base Station) to UE (mobile phone) is called downlink while transmission from UE to eNBs is called uplink. • In downlink OTDOA, UE measures the downlink signals and sent back the results to network.

Another UE-assisted method called the OTDOA has attracted more attention for providing high accuracy. In. 3GPP LTE Rel. 9, the PRS is introduced to enhance

Description of the signals and procedures related to OTDOA location, as specified in 3GPP Release 9 and later, as well as in OMA. Discussion of some details relating to OTDOA which may be considered out of scope of the 3GPP/OMA standards but are needed to achieve successful deployment of OTDOA. In order to achieve better and accurate positioning performance, downlink OTDOA is merged with A-GNSS. The transmission from eNBs (i.e. Base Station) to UE (mobile phone) is called downlink while transmission from UE to eNBs is called uplink. • In downlink OTDOA, UE measures the downlink signals and sent back the results to network. Introduction to OTDOA on LTE Networks How does OTDOA work 7 Since each TOA measurement τ i has a certain accuracy and uncertainty, the hyperbolas in Figure 1-1are shown with a certain width, illustrating the measurement uncertainty. The theoretical accuracy of the TOA estimation is limited by the CRLB.

Otdoa accuracy

your NB-IoT OTDOA positioning design OTDOA and its advantages 3GPP Release 14 further improves NB-IoT to enhance the user experience. Observed time difference of arrival (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 RSTD Accuracy Requirements for OTDOA: 36.133: 0432 rev 1: RSTD Accuracy Requirements for OTDOA: 36.133: 0432 rev 2: RSTD Accuracy Requirements for OTDOA: 36.133: 0432 Another new OTDOA functionality in the 3GPP R14 specification is the possibility of multiple PRS transmission configurations to enable higher positioning accuracy. How does E-CID positioning works in NB-IoT? Simulation model and location accuracy for observed time difference of arrival (OTDOA) positioning technique in Third Generation system Positioning is becoming a key component in many Internet of Things (IoT) applications. The main challenges and limitations are the narrow bandwidth, low power and low cost which reduces the accuracy of the time of arrival (TOA) estimation.

However, this technique has several limitations which makes it difficult to obtain good position accuracy. Since NB-IoT is technique that focuses on low-end

Over-the-air (OTA) measurements verify if a terminal offers adequate sensitivity in any spatial orientation. The minimum performance measurement checks the accuracy and duration of the positioning operation. typical position accuracy of LTE for different user loca-tions, interference scenarios, multipath channels and PRS signalbandwidths. InSec.

respect to A-GNSS and network based methods (OTDOA / enhanced cell ID), also while simulating extreme conditions. Over-the-air (OTA) measurements verify if a terminal offers adequate sensitivity in any spatial orientation. The minimum performance measurement checks the accuracy and duration of the positioning operation.

C. OTDOA The OTDOA technology is based on measurement of reference signal time To ensure the accuracy, the LTE-A standard has required that the PRS from each Neighbor cell measurements etc. can be used to increase the accuracy. LTE Positioning Methods- overview. 3GPP Release 9.

Multiple Linear Regression Model under NB-IoT Technology. on OTDoA due to the use of a dedicated downlink signal for positioning, i.e. the positioning reference signal (PRS), which is a multicarrier Orthogonal Frequency Nov 18, 2013 Indoor Accuracy by Morphology for Qualcomm. Newer methods LTE OTDOA is based on a highly detectable reference signal. ▫ Signaling OTDOA site surveys, testing and optimization may be quoted separately or as FCC mandates that wireless carriers test their networks for location accuracy. May 19, 2019 accuracy of OTDOA-IPDL.
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Some of these factors are beyond vendor or operator control (such as radio propagation environment). Other factors however, can be controlled by proper OTDOA network deployment (such as proper base station synchronization and cell data base generation). There are two types of OTDOA viz. downlink OTDOA and uplink OTDOA (i.e. U-TDOA).

Figure 2 av K Radnosrati · 2017 · Citerat av 15 — sion, resulting in higher OTDOA positioning accuracy, LTE introduced the Positioning Reference Signal (PRS). NB-IoT systems are also equipped with the The positioning accuracy in OTDoA methoddepends on various factors, e.g.
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2014-06-06 · 8 describes several factors which influence OTDOA location performance. Some of these factors are beyond vendor or operator control (such as radio propagation environment). Other factors however, can be controlled by proper OTDOA network deployment (such as proper base station synchronization and cell data base generation).

turn inﬂuences the positioning accuracy. In this thesis, an OTDOA positioning simulation platform has been built. Several approaches have been implemented at transmitter side with an objective of improving positioning accuracy.

May 31, 2020 As UTDoA is also TDoA-based, accurate network synchronization is required. One advantage of UTDoA compared to OTDoA. (downlink) is

The best accuracy could be achieved in the LoS (Line of Sight) conditions, where a signal travels directly from the source to the receiver. your NB-IoT OTDOA positioning design OTDOA and its advantages 3GPP Release 14 further improves NB-IoT to enhance the user experience.

Then, the performance of these OTDOA techniques based on the three path loss models is discussed and compared according to the accuracy of location approximation. Section III gives the simulation parameters, GPS and OTDOA accuracy characteristics, and discusses aircraft position estimation in terms of particle prediction and update. Section IV gives the results of the simulation, in terms of 2-D error, using the sensors individually and then combining the GPS and OTDOA measurements for fused results. One of the main factors that have an impact on the accuracy of position estimation in the OTDoA method is a propagation environment.