In-Vehicle Radar Polarization Layout for Mutual Interference Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In-vehicle radars experience mutual interference, leading to a decreased signal-to-noise ratio, which affects detection precision and increases false alarm probabilities, compromising safety and comfort in advanced driver assistant systems.
Innovation Solution
The method involves determining and configuring the polarization direction of in-vehicle radars to be orthogonal to each other, allowing them to transmit and receive radar signals based on specific angles such as 0 degrees or 90 degrees, thereby reducing mutual interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If in-vehicle radars transmit signals in the same polarization direction, then the detection capability of individual radars is maintained, but mutual interference between radars increases and signal-to-noise ratio decreases
Solution Approach 1:
The patent applies local quality by assigning different polarization directions to different radars based on their specific detection directions. Each radar's polarization is optimized locally rather than using a uniform polarization for all radars, thereby reducing mutual interference while maintaining individual detection capabilities.
Solution Approach 2:
The patent changes the polarization parameter of radar signals to resolve interference. By adjusting the polarization direction angle according to the detection direction of each radar, the system transforms the signal characteristics to minimize mutual interference between radars operating in the same environment.
2Adaptability or versatility
If multiple in-vehicle radars operate simultaneously, then comprehensive detection coverage is achieved, but signal-to-noise ratio decreases due to accumulated interference
Solution Approach 1:
The patent changes the polarization parameter of radar signals to resolve interference. By adjusting the polarization direction angle according to the detection direction of each radar, the system transforms the signal characteristics to minimize mutual interference between radars operating in the same environment.
Solution Approach 2:
The patent segments the polarization space by assigning different polarization directions to radars with different detection directions. This segmentation of the polarization domain allows multiple radars to operate simultaneously without their signals interfering with each other, maintaining both comprehensive coverage and high signal-to-noise ratio.
3Object-affected harmful factors
If orthogonal polarization directions are assigned to radars with opposite detection directions, then mutual interference is reduced, but system complexity increases due to polarization management
Solution Approach 1:
The patent applies local quality by assigning different polarization directions to different radars based on their specific detection directions. Each radar's polarization is optimized locally rather than using a uniform polarization for all radars, thereby reducing mutual interference while maintaining individual detection capabilities.
Solution Approach 2:
The patent changes the polarization parameter of radar signals to resolve interference. By adjusting the polarization direction angle according to the detection direction of each radar, the system transforms the signal characteristics to minimize mutual interference between radars operating in the same environment.
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
This approach effectively maintains a high signal-to-noise ratio, enhancing detection precision and reducing false alarms by minimizing interference between in-vehicle radars, thus ensuring improved safety and performance in unmanned driving scenarios.
Implementation Method 1
The target scatters the intercepted electromagnetic wave in various directions, and some scattered electromagnetic waves thereof (that is, a target echo signal) are in a receiving direction of the in-vehicle radar
Implementation Method 2
determining that a polarization direction of the first radar is a first angle... A polarization direction of the second radar is a second angle. The first angle and the second angle are orthogonal
Data Source
AI summary
A radar signal processing method and an apparatus, and a storage medium that are applied to a first radar. The method includes: determining that a polarization direction of the first radar is a first angle, where the first radar is located at a first vehicle; and transmitting a radar signal based on the polarization direction of the first radar, where a detection direction of the first radar is opposite to a detection direction of a second radar located at the first vehicle, and a polarization direction of the second radar is a second angle; and the first angle and the second angle are orthogonal.