Electronic Device CFAR Detection for Stationary Objects
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Solution Overview
Problem
Existing radar technologies struggle to accurately detect objects, particularly stationary structures and moving vehicles, with high precision and reliability, especially in complex environments.
Innovation Solution
An electronic device equipped with transmission and reception antennas, utilizing a constant false alarm rate (CFAR) to detect objects based on signal intensity and relative velocity, employing millimeter-wave radar and LIDAR technologies, and incorporating a controller for signal processing and detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional radar detection methods are used, then the detection process is simple, but the detection accuracy and reliability are insufficient in complex environments
Solution Approach 1:
The detection process is segmented into multiple independent stages: signal acquisition, preprocessing, CFAR detection, and post-processing. Each stage handles specific tasks independently, improving overall detection accuracy while maintaining manageable complexity through modular processing.
Solution Approach 2:
The system performs preliminary actions by pre-calculating reference signal levels and establishing detection thresholds before actual object detection. The CFAR method pre-processes background clutter characteristics to adaptively set detection criteria, enhancing detection reliability in complex environments.
2Reliability
If adaptive detection thresholds are implemented to improve reliability, then the detection becomes more complex
Solution Approach 1:
The CFAR detection method enables the system to automatically adapt to varying environmental conditions by self-calibrating detection thresholds based on real-time signal characteristics. The system serves itself by using received signals to dynamically adjust detection parameters without external intervention, improving reliability while keeping the adaptation process integrated within the existing detection framework.
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 the accuracy of object detection, enabling precise measurement of distance and relative velocity, and angle of arrival, even in challenging environments, by employing CFAR-based detection and advanced signal processing techniques.
Implementation Method 1
a transmission antenna 25 that transmits a transmission wave Wt
Implementation Method 2
a reception antenna 31 that receives a reflected wave Wr that is the transmission wave Wt having been reflected
Data Source
AI summary
An electronic device includes a transmission antenna, a reception antenna, and a controller. The transmission antenna transmits a transmission wave. The reception antenna receives a reflected wave that is the transmission wave having been reflected. The controller detects a target by using a constant false alarm rate, based on a transmission signal transmitted as the transmission wave and a reception signal received as the reflected wave. The controller detects an object by using the constant false alarm rate, based on a signal intensity of a complex signal corresponding to a distance of an object whose relative velocity with respect to the electronic device is zero.