Radar Apparatus Using Polarization Diversity for Clutter Suppression
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Solution Overview
Problem
Current radar systems face challenges in detecting various detection targets with high accuracy due to limitations in distinguishing between different types of reflectors and clutter, particularly in scenarios involving vehicles and road surfaces.
Innovation Solution
The implementation of a radar system that uses a transmission unit capable of transmitting radio waves with different polarization characteristics, such as vertical and horizontal polarization, and a reception unit with corresponding receivers to identify detection targets based on reception levels, allowing for the differentiation of reflectors and suppression of clutter.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a radar system uses a single receiver to receive reflected radio waves, then the device complexity is low, but the measurement precision for identifying detection targets is insufficient
Solution Approach 1:
The reception unit is segmented into multiple receivers (first receiver and second receiver), each configured to receive reflected radio waves with different polarization characteristics. This segmentation enables the system to measure different polarization components separately, improving detection accuracy by distinguishing between various detection targets based on their polarization responses while maintaining manageable system complexity through modular architecture
Solution Approach 2:
The system introduces polarization dimension as an additional measurement parameter by using receivers with different polarization characteristics. This dimensional expansion allows the radar to differentiate detection targets not only by their spatial position but also by their polarization properties, thereby enhancing measurement precision without requiring excessive complexity in the reception unit
2Adaptability or versatility
If the radar transmits only one type of radio wave, then the device complexity is low, but the adaptability for detecting various detection targets is limited
Solution Approach 1:
The transmission unit is designed with multi-functionality by incorporating multiple transmitters that can transmit radio waves with different polarization characteristics (horizontal and vertical polarization). This universal design enables the radar system to adapt to various detection targets with different reflective properties, improving detection versatility while the transmitters can be controlled to operate in different modes as needed
Solution Approach 2:
The transmission unit employs dynamic operation where the first transmitter and second transmitter can be selectively activated based on detection requirements. The control unit dynamically switches between transmitting horizontally polarized waves, vertically polarized waves, or both, allowing the system to adapt its transmission characteristics to match the specific detection scenario, thereby enhancing versatility without requiring all components to operate simultaneously
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 enhances detection accuracy by effectively identifying and distinguishing between different types of reflectors and reducing the influence of clutter, thereby improving the overall performance of the radar system in detecting vehicles and other targets.
Implementation Method 1
a radar apparatus that transmits radio waves and detects radio waves reflected by a detection target
Implementation Method 2
The first reflected radio wave and the second reflected radio wave have different polarization characteristics from each other
Data Source
AI summary
A radar apparatus according to the present disclosure includes: a transmission unit configured to transmit radio waves; a reception unit including a first receiver configured to receive a first reflected radio wave and a second receiver configured to receive a second reflected radio wave, the first reflected radio wave and the second reflected radio wave having different polarization characteristics from each other and being included in reflected radio waves that are the radio waves reflected by a detection target; and a control unit configured to control operations of the transmission unit and the reception unit, and configured to identify the detection target on the basis of the operation of the transmission unit, a first reception level at the first receiver, and a second reception level at the second receiver.