RFI Map Exchange for Vehicle Radar Interference Mitigation
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Solution Overview
Problem
Vehicle radar systems face challenges in accurately detecting objects due to radio frequency interference (RFI) from other electronic devices and sources, leading to degraded signal quality and potential misidentification of obstacles.
Innovation Solution
A system and method for exchanging spectrum utilization data to aggregate and manage RFI data from various sources, generating an RFI map that indicates power levels and frequency sub-bands for RFI detected at multiple locations, and distributing this information to vehicle radar systems to mitigate and avoid RFI.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vehicle radar systems operate in the radio frequency spectrum to detect objects, then object detection capability is improved, but radio frequency interference from other electronic devices degrades signal quality and causes misidentification
Solution Approach 1:
The system performs preliminary actions by aggregating RFI data from multiple vehicles and infrastructure locations before the radar detection occurs. The central system collects and processes RFI information in advance, creating a predictive RFI map that can be used to anticipate and mitigate interference before it affects the radar signal, thereby maintaining detection reliability while reducing harmful RFI effects
Solution Approach 2:
The patent introduces a central system as an intermediary between the radar systems and the RFI sources. This intermediary aggregates data from multiple vehicles and infrastructure locations, processes the RFI information, and distributes processed data back to the vehicles. The central system acts as a mediator that coordinates RFI mitigation strategies across multiple radar systems, enabling them to operate reliably despite the presence of harmful radio frequency interference
2Reliability
If a central system aggregates RFI data from multiple vehicles and infrastructure locations, then RFI mitigation capability is improved, but system complexity increases
Solution Approach 1:
The central system is designed with multi-functionality, serving multiple purposes: it aggregates RFI data from various sources, processes and analyzes the data, generates RFI maps, and distributes this information to multiple vehicles. By consolidating these functions into a single universal system, the patent reduces the overall system complexity compared to having separate dedicated systems for each function, while maintaining strong RFI mitigation capability
Solution Approach 2:
The system implements feedback mechanisms where the central system receives RFI data from vehicles, processes this information, and returns processed RFI maps to the vehicles. This feedback loop enables continuous improvement and adaptation, allowing the system to learn from actual RFI conditions and refine its mitigation strategies. The feedback mechanism simplifies the overall architecture by using distributed intelligence where vehicles contribute data and receive processed information, reducing the burden on any single complex component
3Ease of operation
If vehicles aggregate RFI information in a decentralized manner from nearby sources, then operational autonomy is improved, but data aggregation accuracy may be reduced compared to centralized processing
Solution Approach 1:
The patent applies segmentation by dividing the RFI data aggregation function into two segments: decentralized aggregation at the vehicle level and centralized aggregation at the cloud level. Vehicles perform local aggregation from nearby infrastructure and other vehicles, maintaining operational autonomy. The central system simultaneously aggregates data from multiple vehicles to achieve broader accuracy. This segmented approach allows both autonomous operation and high accuracy to coexist by leveraging the strengths of both distributed and centralized processing
Data Source
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AI summary
Example embodiments relate to techniques and systems for exchanging spectrum utilization data for radio frequency interference (RFI) mitigation and avoidance. A system can receive RFI data and location data from vehicles or infrastructure locations with the RFI data representing RFI parameters estimated by each vehicle during navigation or by each infrastructure location. The system can aggregate the RFI data into a representation based on the location data with the representation conveying a power level and frequency sub-band for RFI detected at multiple locations. The system can then obtain subsequent locations from vehicles and provide data from the representation to the vehicles based on the locations. In some cases, the system can also provide mitigation instructions to vehicles, such as waveform parameters, frequency bands, polarization, and other adjustments that help avoid RFI. The system can also reroute vehicles to avoid areas with particularly high RFI.