Radar Signal Information Sharing to Reduce Vehicle Radar Interference
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Solution Overview
Problem
Mutual interference between vehicle-mounted radars in intelligent vehicles reduces detection probability and increases false alarm probability, impacting driving safety and comfort.
Innovation Solution
A radar information transmission method that uses radar signals to carry information between devices, allowing for synchronization correction and orthogonal resource allocation to avoid interference without additional communication devices or complex waveform designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If vehicle-mounted radars are widely deployed for intelligent driving functions, then driving safety and comfort are improved, but mutual interference between radars increases
Solution Approach 1:
The patent changes the parameters of radar signals by embedding information in specific time-frequency resources. Different radars use different time-frequency resource allocations, allowing them to coexist without interference while maintaining their detection functions. This resolves the contradiction by modifying signal parameters rather than reducing radar deployment.
Solution Approach 2:
The patent segments the time-frequency resources into distinct regions for different radars. By allocating specific time slots and frequency bands to individual radars, the system enables multiple radars to operate simultaneously without mutual interference, thus maintaining high deployment density while eliminating harmful interactions.
2Object-affected harmful factors
If additional communication devices are installed to enable information transmission between radars, then interference avoidance is achieved, but system cost increases
Solution Approach 1:
The patent makes the radar signal serve multiple functions: both detection and information transmission. By embedding resource allocation information directly in the radar signal's time-frequency structure, the system eliminates the need for separate communication devices while achieving interference avoidance through coordinated resource usage.
Solution Approach 2:
The patent merges the communication function with the radar detection function. Information about radar resource usage is transmitted through the same radar signal that performs detection, combining two previously separate functions into one system and thereby reducing overall system cost while maintaining interference avoidance capabilities.
3Loss of information
If complex waveform design is used to carry information between radars, then information transmission capability is improved, but radar processing velocity decreases
Solution Approach 1:
The patent uses periodic time-frequency resource allocation patterns to embed information in radar signals. By utilizing the inherent periodic structure of radar waveforms and modifying resource allocation in a periodic manner, the system achieves information transmission without requiring complex waveform designs, thus maintaining high processing velocity while enabling communication.
Data Source
AI summary
This application provides a radar information transmission method, an apparatus, and a system, to reduce interference between radars, and relates to the field of wireless communication technologies. In the method, a first device receives a first radar signal that carries information from at least one device. The first device obtains first parsing data based on the first radar signal. The first device determines information from a second device based on a location of one or more information points indicated by the first parsing data in the first parsing data. According to this solution, the first device and the second device can use a radar signal to carry information, to implement information transmission between radars, thereby avoiding mutual interference.