Wireless Object Recognition Jiggling Compensation for Phase Noise
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Solution Overview
Problem
Phase variations due to slight location changes caused by human body movements, such as hand shaking, result in noise and recognition degradation in radar functions like face and gesture recognition using wireless communication systems like 802.11ay.
Innovation Solution
An electronic device equipped with a wireless communication module and movement detection modules, such as acceleration and gyro sensors, detects phase noise and compensates for it by obtaining and matching orientation information from channel impulse responses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a wireless communication system (802.11ay) is used for radar functions like face recognition and gesture recognition, then high data rate and high precision are achieved, but phase noise caused by hand shaking and body movement degrades recognition accuracy
Solution Approach 1:
A movement detection module (acceleration sensor, gyro sensor, or GPS) is introduced as an intermediary to detect device movement and provide compensation information to the radar function, thereby eliminating the harmful phase noise effect without affecting the high precision recognition capability
Solution Approach 2:
The system continuously monitors device movement through the movement detection module and uses the detected movement information to compensate for phase noise in real-time during radar signal processing, creating a closed-loop feedback mechanism that maintains recognition accuracy
2Reliability
If the terminal performs continuous radar functions for object recognition, then high precision recognition is maintained, but location changes due to hand shaking cause phase variation and recognition degradation
Solution Approach 1:
The movement detection module operates continuously or in advance to detect device movement before it affects the radar measurement, allowing the system to prepare compensation data proactively and maintain measurement precision throughout continuous operation
Solution Approach 2:
The movement detection module serves as an intermediary that separates the harmful phase variation effect from the radar measurement process, allowing continuous reliable recognition by compensating for movement-induced phase changes
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
Enhances recognition precision by mitigating phase noise caused by hand shaking and other movements, improving the accuracy of radar functions like face and gesture recognition.
Implementation Method 1
a radar, which is a device for conducting a task such as object recognition, or determining a distance, an altitude, a movement direction, a movement speed, an identification, or a classification using a reflected wave or a scattered wave from an object, generally uses a microwave frequency band
Implementation Method 2
detecting phase noise caused by movement of the electronic device, by controlling the movement detection module
Implementation Method 3
movement detection modules, such as acceleration and gyro sensors
Data Source
Figure 1~2A
Figure 2B~3A
Figure 3B
AI summary
An object recognition method and an electronic device thereof are provided. The method includes transmitting a signal to an external object, controlling a wireless communication module to receive a signal reflected from the external object, controlling the wireless communication module to obtain a channel impulse response based on the transmitted signal and the received signal, obtaining information of an orientation of the external object based on the received signal, detecting phase noise caused by a movement of the electronic device, extracting a component matching the orientation of the external object from the detected phase noise, and compensating for phase information in the channel impulse response based on the component matching the orientation of the external object.