UWB Object Detection Using Reflected Signals With Lower Power
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Solution Overview
Problem
The power consumption of electronic devices increases when measuring distances and angles with ultra-wide band (UWB) communication technology due to the need to identify distances between the device and multiple external devices.
Innovation Solution
The electronic device includes a UWB circuit and a processor that transmits and receives UWB signals to identify distances and objects within a reference distance, using reflected signals to obtain information on external objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the electronic device measures distances to multiple external electronic devices using UWB communication technology, then the distance and angle measurement accuracy is improved, but the power consumption increases
Solution Approach 1:
The patent segments the measurement process into two distinct phases: first, distance measurement using UWB communication with external electronic devices; second, object recognition using reflected signals. This segmentation allows the device to selectively activate measurement functions based on operational needs, reducing unnecessary power consumption while maintaining measurement accuracy when required.
Solution Approach 2:
The patent implements periodic measurement cycles where the electronic device alternates between active measurement modes and low-power states. By conducting distance measurements and object recognition in periodic intervals rather than continuously, the device maintains measurement precision when needed while significantly reducing average power consumption during operation.
2Loss of information
If the electronic device uses reflected signals for object recognition, then the information on external objects is obtained, but the measurement complexity increases
Solution Approach 1:
The patent makes the UWB circuit serve multiple functions: both distance measurement through direct communication with external electronic devices and object recognition through analysis of reflected signals. This multi-functionality eliminates the need for separate measurement and recognition systems, reducing overall device complexity while maintaining comprehensive object information acquisition capabilities.
Solution Approach 2:
The patent uses external electronic devices as intermediaries in the measurement process. These devices receive UWB signals, process them, and return response signals containing distance information. This intermediary approach simplifies the receiving device's complexity by offloading complex signal processing tasks to the external devices, while still enabling accurate object recognition through the returned data.
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 reduces power consumption by optimizing UWB signal usage and allows accurate identification of distances and objects, enhancing device efficiency.
Implementation Method 1
measure the distance and angle between an electronic device and an external electronic device based on an UWB signal
Implementation Method 2
receive a reflected signal of the second UWB signal caused by an external object including the identified external electronic device
Data Source
AI summary
An electronic device includes an ultra wide band (UWB) circuit and at least one processor operatively coupled to the UWB circuit. The at least one processor is configured to receive a response signal from at least one external electronic device via the UWB circuit; identify information on distance between the at least one external electronic device and the electronic device; identify an external electronic device located within reference distance from the electronic device in the at least one external electronic device; transmit a second UWB signal via the UWB circuit, toward the identified external electronic device; receive a reflected signal of the second UWB signal caused by an external object including the identified external electronic device within time interval identified based on distance between the electronic device and the identified external electronic device; and based on the reflected signal, obtain information on the external object. Other various embodiments are possible.