Radar Signal Timing Adjustment for Inter-Radar Interference
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Solution Overview
Problem
Radar devices experience interference from multiple sources, leading to indistinguishable waveforms and false targets or incorrect information due to overlapping radar signals, which is problematic for safety features in vehicles and automated driving systems.
Innovation Solution
A radar device detects interfering signals and performs timing adjustments or requests timing adjustments from other radar devices to reduce interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple radar devices operate simultaneously in the same area, then radar coverage and detection capability are improved, but inter-radar interference increases causing indistinguishable waveforms and false targets
Solution Approach 1:
The patent applies dynamics by making radar transmission timing adjustable and adaptive. Each radar device can dynamically change its transmission timing based on detected interference conditions, transitioning from fixed simultaneous transmission to flexible temporal positioning. This allows the system to maintain high detection capability while avoiding fixed interference patterns through dynamic timing adjustments.
Solution Approach 2:
The patent changes the timing parameter of radar transmission to resolve interference. By adjusting the transmission timing parameter of individual radar devices based on detected interfering signals, the system transforms the fixed temporal parameters into variable parameters. This parameter change enables radar devices to operate simultaneously while maintaining distinguishable waveforms through temporal differentiation.
2Ease of operation
If radar devices use conventional FMCW waveforms, then waveform simplicity and processing efficiency are improved, but waveform indistinguishability from other radar sources occurs
Solution Approach 1:
The patent segments the radar waveform in the time domain by introducing timing adjustments that create temporal separation between different radar devices' transmissions. This segmentation allows conventional FMCW waveforms to be processed efficiently while maintaining distinguishability, as each device's waveform occupies a different temporal slot rather than being perfectly overlapped.
Solution Approach 2:
The patent introduces timing adjustment as an intermediary mechanism between radar devices and the interference problem. This intermediary temporal positioning layer allows conventional waveforms to coexist without direct collision, acting as a mediator that preserves waveform simplicity while preventing indistinguishability through temporal differentiation.
3Reliability
If radar devices transmit signals continuously for safety feature monitoring, then detection reliability is improved, but interference from multiple simultaneous transmissions increases
Solution Approach 1:
The patent implements periodic timing adjustments rather than continuous fixed transmission. Radar devices perform continuous monitoring but with periodic variations in transmission timing based on detected interference. This periodic action maintains detection reliability through continuous operation while preventing systematic interference through varying temporal patterns.
Solution Approach 2:
The patent employs feedback mechanisms where radar devices detect interfering signals and use this information to adjust their transmission timing. This closed-loop feedback system ensures continuous reliable detection while dynamically adapting to interference conditions, allowing the system to maintain high reliability without suffering from fixed simultaneous transmissions.
Data Source
AI summary
Methods, apparatuses, and computer program products for radar devices are provided. A radar device may detect an interfering radar signal from a second radar device that interferes with measurement of a return of a radar signal from the first radar device. The radar device may perform a timing adjustment action in response to detecting the interfering radar signal from the second radar device.