Sectorized Radar Beamwidth Control for Neighboring Interference
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Solution Overview
Problem
Radar systems experience interference from neighboring systems, leading to inaccurate object detection and potential collisions, and conventional interference mitigation techniques either halt radio wave broadcasting or involve complex design changes.
Innovation Solution
A radar system divides its operating beamwidth into sectors, determines the direction-of-arrival and power level of interfering signals, selects sectors with low energy levels, and broadcasts trimmed radio waves within these sectors to mitigate interference, maintaining object detection reliability while reducing design complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radar systems broadcast radio waves continuously to detect objects, then object detection capability is maintained, but interference from neighboring radar systems increases leading to inaccurate detection
Solution Approach 1:
The patent divides the operating beamwidth into multiple sectors (e.g., first sector, second sector, third sector, fourth sector) and selectively broadcasts trimmed radio waves in only those sectors where interference power is below a threshold. This segmentation allows the system to maintain detection capability in clear sectors while avoiding interference-prone areas, thus resolving the contradiction between continuous broadcasting and interference avoidance.
Solution Approach 2:
The patent applies different broadcasting strategies to different sectors based on local interference conditions. By determining the power level of received signal energy in each sector and selectively trimming the beamwidth in sectors with high interference, the system achieves local optimization of detection accuracy versus interference avoidance, improving overall reliability without requiring complete beamwidth reduction.
2Object-affected harmful factors
If conventional interference mitigation techniques halt radio wave broadcasting to reduce interference, then interference is minimized, but object detection capability is lost
Solution Approach 1:
Instead of halting broadcasting entirely, the patent segments the beamwidth into multiple sectors and applies selective trimming. The system identifies specific sectors with high interference power and trims the beamwidth in those sectors while maintaining full beamwidth in sectors with low interference. This approach minimizes interference where needed while preserving detection capability in clear sectors.
Solution Approach 2:
The patent applies partial trimming of the beamwidth rather than complete cessation of broadcasting. By trimming only the portions of the beamwidth that correspond to high-interference sectors while maintaining full broadcasting in low-interference sectors, the system achieves sufficient interference mitigation without completely sacrificing object detection capability.
3Device complexity
If radar systems use fixed beamwidth broadcasting to simplify system design, then device complexity is reduced, but interference mitigation capability is limited
Solution Approach 1:
The patent introduces dynamic beamwidth trimming based on real-time interference conditions. The controller determines the power level of received signal energy in each sector and dynamically adjusts the beamwidth by trimming sectors with high interference power. This dynamic adaptation allows the system to maintain simple overall architecture while adding targeted interference mitigation capability where needed.
Solution Approach 2:
The patent changes the beamwidth parameter dynamically based on interference conditions. By adjusting the beamwidth from full width to trimmed width (excluding specific sectors) depending on the determined power level of received signal energy, the system achieves flexible interference mitigation without requiring complete system redesign, thus balancing complexity and effectiveness.
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
The system effectively mitigates interference by broadcasting trimmed radio waves, ensuring accurate object detection and reducing design complexity compared to conventional methods.
Implementation Method 1
A radar system broadcasts a radio wave that is reflected from an object
Data Source
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AI summary
A radio detection and ranging (radar) system includes various antennas and a controller. The antennas receive an interfering radio wave in an operating beamwidth of the radar system. The operating beamwidth is divided into a plurality of sectors. The controller determines a direction-of-arrival and a power level of the interfering radio wave. Further, the controller determines a power level of received signal energy within each sector of the plurality of sectors, and selects, from the plurality of sectors, a set of sectors such that a power level of received signal energy within each sector of the set of sectors is less than a threshold value of the corresponding sector. The controller then broadcasts another radio wave within the selected set of sectors to mitigate the interference of the interfering radio wave.