Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Autonomous direction finding using differential angle of arrival

A directional antenna and beacon signal technology, applied in the field of tracking, can solve problems such as complex antennas, and achieve the effect of reducing current consumption and simple antenna design

Inactive Publication Date: 2015-10-28
KONINKLJIJKE PHILIPS NV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As another example, complex and / or bulky antennas (such as high-gain directional antennas) are required

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Autonomous direction finding using differential angle of arrival
  • Autonomous direction finding using differential angle of arrival
  • Autonomous direction finding using differential angle of arrival

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0030] To address direction and range in autonomous direction finding, this application describes a one-way tracking system that combines the use of radio frequency (RF) beacon transmitters on tracked objects with direction finding (DF) equipment combination. DF devices use differential time-of-flight (DToF), received signal strength indicator (RSSI), electronic compass, and directional antennas to provide bearing and range estimates to the object. The tracking system reduces tracking problems caused by multipath environments by determining a position from the signal with the shortest time-of-flight (ToF) and thus the fewest reflections. This enables the best estimation of the shortest path to the object and eliminates the need for two-way communication. This allows DF devices to achieve maximum link budget, and allows DF devices to operate in ranges where bi-directional communication is not possible.

[0031] In one embodiment, the tracking system is used to track Alzheimer...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A system (10) and a method (150) track a tracking device (14). A radio frequency (RF) receiver (52) is configured to receive a periodic beacon signal originating at the tracking device (14). The periodic beacon signal is received with a directional antenna (36) at multiple bearings over time. An estimator (70) is configured to estimate a bearing to the tracking device (14) as the bearing of the multiple bearings in which a time of flight (ToF) of the periodic beacon signal is lowest. The RF receiver (52) can further be configured to simultaneously receive multiple instances of the periodic beacon signal with the directional antenna (36) at a bearing of the multiple bearings. In such instances, the RF receiver (52) is further configured to correlate the instances to identify which of the instances has a lowest ToF.

Description

technical field [0001] This application generally relates to tracing. This application finds particular application in connection with, and will be described with specific reference to, Alzheimer's patients. However, it should be understood that the present application is also applicable to other usage scenarios, such as tracking commodities, goods, materials or vehicles, and is not necessarily limited to the above-mentioned applications. Background technique [0002] The home health care tracking system for wandering Alzheimer's patients allows the patient to be located once outside the Alzheimer's patient's defined safe zone or geofence. When a patient leaves the corresponding safety zone or geofence, an alarm signal and / or tracking service is enabled. For example, an alarm signal could trigger an alarm, such as a cellular alarm, to a caregiver or a remote call center where a Personal Response Assistant (PRA) points to an emergency. For example, the tracking service can...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01S3/38
CPCG01S3/38G01S5/06
Inventor S·莱丁厄姆K·C·J·韦杰布兰斯P·K·雷迪
Owner KONINKLJIJKE PHILIPS NV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com