Radar Angle Estimation with Dynamic Frame Processing
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Solution Overview
Problem
Existing radar systems on mobile devices face challenges in efficiently estimating the angle of objects while minimizing radio frequency exposure, particularly in scenarios where objects are moving or have varying motion patterns.
Innovation Solution
The system employs a processor connected to a radar transceiver to transmit and process radar signals, determining whether to use a single radar frame or multiple frames for angle identification based on object motion. This allows for accurate angle estimation and dynamic adjustment of RF exposure levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If multiple radar frames are used for angle estimation, then measurement precision is improved, but radio frequency exposure increases
Solution Approach 1:
The system dynamically adjusts the number of radar frames used for angle estimation based on the detected motion characteristics of the object. When the object is determined to be stationary or moving minimally, multiple frames are processed to improve angle estimation precision. When motion is detected, the system reduces to single-frame processing to minimize RF exposure, thus adaptively balancing measurement precision and safety.
Solution Approach 2:
The system changes the processing parameter (number of frames) based on object motion state. By detecting motion characteristics and adjusting the frame processing count accordingly, the system optimizes the trade-off between angle estimation accuracy and radio frequency exposure levels.
2Measurement precision
If multiple radar frames are processed, then angle identification accuracy is improved, but processing time increases
Solution Approach 1:
The system dynamically selects between single-frame and multi-frame processing based on object motion detection. This adaptive approach ensures that multi-frame processing (which is more time-consuming but more accurate) is only used when necessary for stationary or slow-moving objects, while fast-moving objects use quick single-frame processing.
Solution Approach 2:
The system uses a single radar frame as a quick, low-cost processing option for objects with significant motion, accepting slightly reduced accuracy in exchange for rapid processing. This 'disposable' single-frame approach is sufficient when motion makes multi-frame processing inefficient.
3Productivity
If single radar frame is used, then processing speed is improved, but angle estimation precision deteriorates
Solution Approach 1:
The system employs dynamic frame selection based on motion detection. When objects are detected with significant motion characteristics, the system processes only a single radar frame to maintain high processing speed. When objects are stationary or moving minimally, the system switches to multi-frame processing to achieve better angle estimation precision.
Solution Approach 2:
The system applies partial processing (single frame) when sufficient for moving objects, and excessive processing (multiple frames) when needed for stationary objects. This selective approach ensures processing speed is maintained when possible while achieving necessary precision when required.
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 enables precise angle identification between the mobile device and objects, while also effectively managing RF exposure levels to ensure compliance with regulatory limits and maintain optimal communication quality.
Implementation Method 1
The processor is operably connected to a radar transceiver. The processor is configured to transmit, via the radar transceiver, radar signals to detect an object
Data Source
AI summary
An electronic device includes a processor operably connected to a radar transceiver. The processor is configured to transmit, via the radar transceiver, radar signals to detect an object. The processor is also configured to detect the object using a single radar frame or multiple radar frames from the radar signals. The processor is further configured to determine whether to use the single radar frame or the multiple radar frames based on motion of the object for angle identification between the object and the electronic device. Additionally, the processor is configured to identify the angle using the single radar frame based on a determination to use the single radar frame or the multiple radar frames based on a determination to use the multiple radar frames. The processor is also configured to modify radio frequency exposure levels based on the angle of the object relative to the electronic device.