UWB User Location Tracking with Height-Adaptive Angle Detection
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Solution Overview
Problem
Existing electronic devices for detecting user location suffer from reduced accuracy due to varying distances and angles caused by the external device being held in different locations by the user, such as pockets or bags, leading to malfunctions.
Innovation Solution
The electronic device adjusts tracking conditions based on the height of the external device held by the user, using ultra-wide band signals and multiple antennas to maintain accuracy by adjusting reference times, distances, and angles, and estimates angles based on distance values when the external device is out of range.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If the external electronic device is manufactured smaller to provide portability, then the portability is improved, but the distance or angle detected by the electronic device varies depending on the location of the external electronic device held by the user, reducing the accuracy for the user's location
Solution Approach 1:
The system performs preliminary detection of the external device's height above the ground before final location determination. By measuring the height in advance and using it to adjust tracking parameters, the system compensates for variations caused by different holding positions, thereby maintaining location accuracy despite the small size and portability of the external device
Solution Approach 2:
The system dynamically changes tracking parameters (such as reference height, detection thresholds, and calculation models) based on the detected height of the external device. When the device is held at different positions (e.g., in a pocket versus in hand), the height varies, and the system adjusts its parameters accordingly to maintain accurate location tracking
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach ensures accurate tracking and prevents malfunctions by adapting to different holding locations, maintaining reliable operation and mode changes without user intervention.
Implementation Method 1
The electronic device may detect the distance (or straight-line distance) between the electronic device and the external electronic device using the time of flight (ToF) of the signal or may detect the direction (or angle) where the external electronic device is located, by measuring the angle of arrival (AoA) using a plurality of antennas.
Implementation Method 2
The electronic device may detect the direction (or angle) where the external electronic device is located, by measuring the angle of arrival (AoA) using a plurality of antennas.
Implementation Method 3
The electronic device may detect the distance (or straight-line distance) between the electronic device and the external electronic device using the time of flight (ToF) of the signal
Data Source
Figure 1a~1b
Figure 2
Figure 3~4
AI summary
An electronic device is provided. The electronic device includes a plurality of antennas to communicate with an external electronic device and at least one processor operatively connected to the plurality of antennas. The processor is configured to detect a tracking start event using an external magnetic material positioned at a location adjacent to the electronic device, to track a location of the external electronic device using the plurality of antennas and, while the tracking is performed, to obtain a height value of the external electronic device when an angle between the electronic device and the external electronic device is a specified angle. The processor is further configured to change a specified condition based on the obtained height value, to detect a tracking end event based on the specified condition, and to change an operating mode associated with the electronic device in response to detecting the tracking end event.