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Partially synchronized multilateration or trilateration method and system for positional finding using RF

A wireless system, timing synchronization technology, applied in radio wave measurement systems, satellite radio beacon positioning systems, measurement devices, etc., can solve the inaccuracy of cellular/wireless antenna location database, synchronization accuracy is not achieved, lack of cellular wireless network precise time synchronization, etc.

Active Publication Date: 2017-11-28
QUALCOMM TECHNOLOGIES INC
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] While cellular network time synchronization may be sufficient to comply with the mandatory FCC NG E911 emergency location requirements, this synchronization accuracy falls short of the needs of users of LBS or RTLS systems who require significantly more precise location
Therefore, there is a need in the art to mitigate positioning errors caused by: 1) the lack of precise time synchronization of cellular / wireless networks for the purpose of supporting LBS and RTLS; and 2) in the cellular / wireless antenna position database imprecision

Method used

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  • Partially synchronized multilateration or trilateration method and system for positional finding using RF
  • Partially synchronized multilateration or trilateration method and system for positional finding using RF
  • Partially synchronized multilateration or trilateration method and system for positional finding using RF

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Embodiment Construction

[0053] Reference will now be made in detail to the preferred embodiments of embodiments of the invention, examples of which are illustrated in the accompanying drawings.

[0054] Embodiments of the present invention relate to a method and system for RF-based identification, tracking and localization (including RTLS) of objects. According to an embodiment, the methods and systems employ narrow bandwidth ranging signals. The described embodiment operates in the VHF band, but can also be used in the HF, LF and VLF bands as well as the UHF band and higher frequencies. It employs a multipath mitigation processor. The use of a multipath mitigation processor can improve the accuracy of tracking and positioning performed by the system.

[0055] Embodiments include a small, very portable base unit that allows a user to track, locate and monitor multiple people and objects. Each unit has its own ID. Each unit broadcasts an RF signal with its ID and each unit is able to send back a r...

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Abstract

Systems and methods for determining a location of user equipment (UE) in a wireless system can comprise receiving reference signals via a location management unit (LMU) having two or more co-located channels, wherein the two or more co-located channels are tightly synchronized with each other and utilizing the received reference signals to calculate a location of the UE, Some systems may include multichannel synchronization with a standard deviation of less than or equal 10 ns. Some systems may include two LMUs, with each LMU having internal synchronization, or one LMU with tightly synchronized signals.

Description

[0001] Cross References to Related Applications [0002] This application claims the title "PARTIALLY SYNCHRONIZED MULTILATERATION / TRILATERATION METHOD AND SYSTEM FOR POSITIONAL FINDING USING RF" filed on October 24, 2014. benefit of U.S. Provisional Application No. 62 / 068,537. technical field [0003] Embodiments of the present invention relate to wireless communication and wireless networking systems and systems for radio frequency (RF) based identification, tracking and location of objects, including RTLS (Real Time Location Service) and LTE based location services. Background technique [0004] RF-based identification and location finding systems for determining the relative or geographic location of objects are generally used for tracking single objects or groups of objects and for tracking individuals. Conventional position finding systems have been used for position determination in open outdoor environments. Typically RF based Global Positioning System (GPS) / Globa...

Claims

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Application Information

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IPC IPC(8): G01S19/23
CPCG01S5/06G01S5/14G01S5/0218G01S2205/06
Inventor 菲力克斯·马克霍夫斯凯杜鲁门·普雷瓦特鲁斯·马克霍夫斯凯
Owner QUALCOMM TECHNOLOGIES INC
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