Vehicle Radar Device Frequency Interference Avoidance
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Solution Overview
Problem
Existing radar devices on vehicles experience periodic and continuous frequency interference due to overlapping signal operation ranges, which current interference avoidance methods fail to effectively mitigate.
Innovation Solution
A radar device system that identifies and transmits frequency and time information to other radar devices on the same vehicle to adjust transmission parameters, such as frequency operation range and transmission periods, to avoid interference by comparing and adjusting the transmission information of each device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple radar devices are mounted on the same vehicle to enhance sensing coverage, then the sensing capability is improved, but frequency interference occurs due to overlapping signal operation ranges
Solution Approach 1:
The patent implements periodic transmission of radar signals with carefully controlled duty cycles and time intervals. Each radar device transmits signals in periodic bursts rather than continuously, allowing other radars to receive and process signals during idle periods. This periodic action pattern enables multiple radars to share the electromagnetic spectrum without continuous interference.
Solution Approach 2:
The patent dynamically adjusts transmission parameters including frequency, time, and power levels based on real-time detection of other radar devices. The system continuously monitors the electromagnetic environment and adapts transmission characteristics to avoid overlapping with other radars, making the interference avoidance mechanism flexible and responsive rather than static.
Solution Approach 3:
The patent employs feedback mechanisms where each radar device receives transmission information from other radars and adjusts its own transmission parameters accordingly. This closed-loop control system allows radars to respond to the presence and operation of other radars, creating a coordinated transmission pattern that minimizes interference while maintaining sensing effectiveness.
2Device complexity
If interference avoidance logic with similar structure is applied to periodic scan patterns, then the control method is simplified, but interference phenomena appear periodically or continuously
Solution Approach 1:
The patent introduces asymmetric variations in transmission parameters among different radar devices. Instead of using identical scan patterns and timing, each radar device employs slightly different frequency offsets, time delays, or chirp slopes. This asymmetry breaks the periodicity of interference patterns that would occur with identical configurations, converting regular interference into irregular, less problematic signal variations.
Solution Approach 2:
The patent changes key transmission parameters such as frequency, time, and slope to create diverse transmission characteristics across multiple radar devices. By varying these parameters rather than maintaining uniform settings, the system prevents the formation of consistent interference patterns while still using structured control methods.
Data Source
AI summary
The radar device for a vehicle according to an exemplary embodiment of the present invention includes an antenna part for transmitting a radar signal and receiving a reflected signal; and a signal processor for detecting a target by processing the radar signal and the reflected signal, wherein the signal processor may identify at least one radar device capable of generating frequency interference with the radar signal among a plurality of other radar devices based on a frequency operation range and a radar recognition range of the plurality of other radar devices mounted on the same vehicle, identify transmission information including transmission frequency information and transmission time information for the radar signal, and transmit the transmission information to the at least one radar device.