Bluetooth Direction Detection Using Phase and Antenna Arrays
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Solution Overview
Problem
Existing image processing apparatuses require users to change the direction of the wireless retrieval device to detect the location of the image processing apparatus, which can be inconvenient.
Innovation Solution
A mobile terminal performs Bluetooth communication with an image processing apparatus, receiving a Bluetooth packet, detecting the location direction based on the phase of the radio wave, and displaying the detected direction, utilizing multiple antennas for angle of arrival and departure estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the direction of the wireless retrieval apparatus is changed to detect the direction of the wireless apparatus, then the location direction can be detected, but it causes inconvenience to the user
Solution Approach 1:
Instead of requiring the retrieval apparatus to change direction to detect the target, the patent inverts the approach by having the retrieval apparatus remain stationary and using multiple antennas to detect the direction of incoming signals from the target apparatus. This allows direction detection without user manipulation.
Solution Approach 2:
The patent introduces multiple antennas as intermediaries between the retrieval apparatus and the target apparatus. These antennas receive signals from different spatial positions, enabling the system to calculate the angle of arrival and determine direction without physically moving the retrieval apparatus.
2Measurement precision
If multiple antennas are used for angle of arrival estimation, then the direction detection accuracy is improved, but the device complexity increases
Solution Approach 1:
The multiple antennas serve multiple functions: they simultaneously enable direction detection through angle of arrival estimation, provide signal redundancy for improved reliability, and support both Bluetooth and wireless LAN communications. This multi-functionality justifies the added complexity.
Solution Approach 2:
The patent replaces mechanical direction changing (physically moving the apparatus) with an electromagnetic field-based solution using multiple antennas and signal processing. This substitution achieves direction detection through electromagnetic measurements rather than mechanical manipulation.
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
Enables users to easily recognize the direction of the image processing apparatus, facilitating seamless Bluetooth communication and subsequent wireless LAN communication without the need to change device orientation.
Implementation Method 1
detecting a location direction of the image processing apparatus based on a phase of a radio wave of the received packet
Implementation Method 2
utilizing multiple antennas for angle of arrival and departure estimation
Data Source
AI summary
According to an aspect of the present disclosure, a terminal performing Bluetooth® communication with an image processing apparatus, includes a memory and a processor in communication with the memory. The processor performs receiving a Bluetooth® packet transmitted from the image processing apparatus, displaying, on the display unit, information on the image processing apparatus as a retrieval result, based on the received packet, detecting a location direction of the image processing apparatus based on a phase of a radio wave of the received packet, and displaying, on the display unit, the detected location direction of the image processing apparatus.