There are two types of OTDOA viz. downlink OTDOA and uplink OTDOA (i.e. U- TDOA). In order to achieve better and accurate positioning performance,

Nov 19, 2020 The main challenges and limitations are the narrow bandwidth, low power and low cost which reduces the accuracy of the time of arrival (TOA)

Equipment (UE) measures the Mar 29, 2021 We're often asked “How accurate is TDOA?”. Unfortunately, a short and simple answer is not necessarily the best one. We'll give you the short Sep 1, 2014 4.2.1.2 OTDOA. LTE OTDOA is expected to give improved performance ( accuracy and yield) compared to.

Otdoa 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. 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).

users can be estimated with high accuracy (16 œ 20 m in free propagation availability enhancements to OTDOA (time alignment IPDL. (TA-IPDL) [2]

serving cell in the UE Assisted Satellite positioning (A-GPS, etc) Difference of Arrival (OTDOA) and Assisted Global Navigation Satellite System (A-GNSS), due to the high level of accuracy these methods can achieve with no requirement for additional radio network equipment (where OTDOA is used for indoor locations and A-GNSS for outdoor environments). A 50 meter horizontal accuracy must be provided for 40, 50, 70, 80 % of emergency calls within 2, 3, 5, 6 years respectively. For vertical performance, operators should propose an accuracy metric within 3 years – to be approved by the commission – and comply with the metric within 6 years. 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.

Methods and devices for performing hybrid fingerprinting/observed time difference of arrival (OTDOA) positioning are described. Fingerprinting information can be used to improve OTDOA results by using the fingerprinting information to generate OTDOA assistance information.

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.

Observed Time Difference of Arrival (OTDOA) is the method av A Folkesson · 2015 — Extended accuracy analysis of a covariance matching approach for identifying Enhanced WCDMA fingerprinting localization using OTDOA Triangulation • OTDOA (Observed Time Difference Of Arrival), WCDMA • AFLT GGA - Essential fix data which provide 3D location and accuracy data GSA 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). 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.
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Aug 11, 2014 Wireless E911 Location Accuracy Requirements, PS Docket No. Even 4G LTE Observed Time Difference of Arrival (“OTDOA”) technology will 4 days ago OTDOA accuracy is 50 to 200 meters. 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).

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.
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One of the main factors that have an impact on the accuracy of position estimation in the OTDoA method is a propagation environment. The best accuracy could be achieved in the LoS (Line of Sight) conditions, where a signal travels directly from the source to the receiver.

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).

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Extended accuracy analysis of a covariance matching approach for identifying Enhanced WCDMA fingerprinting localization using OTDOA positioning

The work in [9] The theoretical accuracy of the TOA estimation is limited by the CRLB. In this section, we compute the CRLB of TOA estimation for the OFDM- based LTE signal.