Vehicle Radar Interference Signaling for NLOS Detection Accuracy
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The increasing interference between vehicle-mounted radars reduces radar detection efficiency and increases false alarm or missed detection probabilities, particularly in scenarios like intersections and T-junctions, due to non-line-of-sight cases and spatial distribution, affecting driving safety and comfort.
Innovation Solution
A detection method and apparatus that involves listening for signals from different directions and transmitting signals to indicate predicted interference time-frequency ranges, allowing other radars to adjust their detection signals to avoid interference, thereby improving accuracy and safety.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interference listening technology is used to avoid signal interference, then the probability of false alarm and missed detection is reduced, but the time required for listening increases, which reduces the time available for target detection in scenarios like intersections and T-junctions
Solution Approach 1:
The patent applies preliminary action by having radars pre-share their time-frequency resource occupation status through signaling before actual detection occurs. This allows other radars to advance-know about potential interference and adjust their listening and detection strategies accordingly, reducing the time needed for actual interference listening at critical moments like intersections.
Solution Approach 2:
The patent implements feedback mechanisms where radars transmit signaling information about their transmit signals (including time-frequency ranges) to other radars. This feedback loop enables dynamic adjustment of detection parameters based on real-time interference conditions, optimizing the balance between listening time and detection accuracy without requiring excessive listening duration.
2Productivity
If vehicle-mounted radar penetration rate increases, then more vehicles can benefit from radar detection, but mutual interference between radars becomes increasingly severe, reducing detection efficiency and increasing false alarm probability
Solution Approach 1:
The patent introduces signaling information as an intermediary mechanism that mediates between multiple radars. This signaling system acts as a communication layer that allows radars to coordinate their operations by sharing time-frequency resource status, thereby reducing mutual interference while maintaining high penetration rates and detection coverage across the vehicle fleet.
Solution Approach 2:
The patent applies parameter changes by dynamically adjusting radar detection parameters (such as time-frequency ranges) based on received signaling information from other radars. This allows each radar to adapt its operating parameters in real-time to avoid interference, maintaining detection accuracy even as the overall number of radars in the system increases.
3Productivity
If radars use the same time-frequency resources for detection, then detection efficiency is maximized, but interference between radars increases, causing false alarms and missed detections
Solution Approach 1:
The patent applies segmentation by dividing the time-frequency resources into distinct segments that are allocated to different radars based on their signaling information. Instead of allowing all radars to use the entire time-frequency spectrum simultaneously, the system segments resource usage coordinates through signaling, reducing interference while maintaining overall detection efficiency through coordinated resource utilization.
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
Enhances the accuracy of target detection by vehicle-mounted radars, especially at intersections, by predicting and avoiding interference, thus improving driving safety and comfort.
Implementation Method 1
a radar 101 may transmit a sounding signal outwards, and receive an echo signal reflected by a target object 102
Implementation Method 2
receive an echo signal reflected by a target object 102
Implementation Method 3
a receive antenna of the radar 101 may also receive a transmit signal of the radar 103
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
This application discloses a detection method, a detection apparatus (260), a detection system, and a radar. The method includes: listening for at least one signal coming from at least one direction (S 1001), where the at least one signal includes a first signal corresponding to a first direction; and transmitting a second signal toward a second direction, where the second signal is used to indicate a predicted interference time-frequency range (S 1002), and time-frequency ranges of the first signal and the second signal meet at least one of the following: a frequency domain range of the first signal is a subset of a frequency domain range of the second signal; or a time domain range of the first signal is a subset of a time domain range of the second signal. The interference time-frequency range is indicated to the second direction by transmitting the second signal, so that a second detection apparatus (270) obtains the interference time-frequency range of a non-line-of-sight area, thereby improving accuracy of target detection by the second detection apparatus (270). The solution may be further used in the field of self driving, intelligent driving, or unmanned driving, to improve an interference avoiding capability of a vehicle, and improve driving safety of the vehicle.