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Fundamental Performance Limits on Time of Arrival Estimation

It's a multilateration method in which the User Equipment (UE) measures the time difference between some specific signals from several eNodeBs and reports these time differences to a specific device in the network (the ESMLC). 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.

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. The methods include generating various types of sequences, changing the original sequence One embodiment of the present invention relates to a method for performing, by a base station, observed time difference of arrival (OTDOA)-related operations in a wireless communication system, the method comprising the steps of: transmitting a positioning reference signal (PRS) to a terminal through a PRS positioning occasion to which at least two precoding processes are applied; receiving will advance E911 location accuracy utilizing a variety of technological solutions including those based on traditional latitude/longitude methods for both outdoor and indoor calls (e.g., AGNSS, OTDOA), as well as emerging next -generation solutions that would provide a “ dispatchable location” to first responders for calls made from indoors. 7.13 Cell phase synchronization accuracy (Synchronized mode of dual connectivity) 7.14 PSCell Addition and Release Delay for E-UTRA Dual Connectivity 7.15 Maximum Receive Timing Difference in Dual Connectivity 3) FACTORS INFLUENCING OTDOA ACCURACY 3.1 Measurement Geometry: The estimation geometry affects accuracy. The most broad parameter used to evaluate the effect of the geometry on the last accuracy is the Geometrical Dilution of Precision (GDOP).

Publications; Automatic Control; Linköping University

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.

Muting pattern strategy for positioning in cellular 1114262/ Muting

Abstract and Figures In this paper we investigate the positioning accuracy of user equipment (UE) with observed time difference of arrival (OTDoA) technique in Long Term Evolution (LTE) networks OTDOA (Observed Time Difference of Arrival) † UE location can be tri-laterated with the knowledge of three or more eNB’s –Transmit timings of the cells in the system and their geographical locations –Received time difference of at least two other cells vs. serving cell in the UE Assisted Satellite positioning (A-GPS, etc) With the above extensive OTDOA enhancements considered for feMTC and NB-IoT, based on the limited time-dispersion/ time-spread/ multipath EPA (Extended Pedestrian A model) 3GPP channel scenario with outdoor deployment of 1.732km ISD (Inter-Site Distance), the 50m positioning accuracy for 67% of the UEs is achievable for both device types. OTDOA (Observed Time Difference Of Arrival) is a positioning feature introduced in rel9 E-UTRA (LTE radio). It's a multilateration method in which the User Equipment (UE) measures the time difference between some specific signals from several eNodeBs and reports these time differences to a specific device in the network (the ESMLC). Abstract: The accuracy of the observed time difference of arrival (OTDOA) in the long-term evolution (LTE) systems depends on the accuracy of the time of arrival (TOA) measurements, which are often corrupted by various errors caused by non-light-of-sight propagation, multipath interference, noise, and path detection techniques.

AXEL BERG OTDOA Hyperbolas for 1.92 MHz The proposed algorithm greatly increases the positioning accuracy as.
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usage for emergency calls and lack of accurate positioning information on calls that originate indoors. Apr 27, 2015 DARPA's Extreme Accuracy Tasked Ordnance (EXACTO) program, which developed a self-steering bullet to increase hit rates for difficult, Automatic probe-fit check and in-ear calibration for increased accuracy; Easy- to-interpret colorful DPGrams and detailed information for each frequency tested the techniques used to locate wireless 911 callers require that accurate locations of cellular antenna towers be Figure 1 – Accurate OTDOA (Urban). 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.

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.
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OTDOA-Based Positioning in Narrowband IoT Lunds

The transmission from eNBs (i.e. Base Station) to UE (mobile phone) is called downlink while transmission from UE to eNBs is called uplink.