Vehicle Radar Operating Range Assignment for Low Interference
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Solution Overview
Problem
The increasing number of vehicles equipped with radar sensors leads to interference between radar signals, causing noise and potentially resulting in malfunction or decreased performance of the radar sensors, especially when sensors operate in the same frequency band or have coordinated activity time windows.
Innovation Solution
Assigning each radar sensor an operating range based on the vehicle's degrees of freedom of movement, such as location and orientation, to differentiate the frequency bands, coding, and activity time windows used by radar sensors in different vehicles, thereby reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If radar sensors operate in the same frequency band to maximize resource utilization, then the number of available operating ranges increases, but interference between radar sensors increases
Solution Approach 1:
The patent assigns different operating ranges to radar sensors based on their local characteristics, specifically their spatial location and orientation. Sensors in different geographic locations or with different orientations are assigned different frequency bands or time windows, creating localized quality differences that prevent interference while allowing maximum resource utilization in each local context
Solution Approach 2:
The patent implements dynamic assignment of operating ranges that can change based on the vehicle's movement. As vehicles move through different locations or change orientation, their assigned operating ranges are adjusted accordingly. This dynamic approach allows sensors to share operating ranges when spatially separated or differently oriented, while automatically preventing interference when sensors come into interfering positions
2Measurement precision
If the number of radar sensors in vehicles increases to improve detection coverage, then measurement precision improves, but the frequency of interference between sensors increases
Solution Approach 1:
The patent changes the parameter of operating range assignment from static to dynamic, and from uniform to location-dependent. By varying frequency band, coding, or activity time window parameters based on spatial coordinates and orientation angles, the system enables multiple sensors to operate simultaneously without interference, thus supporting increased sensor density for improved detection coverage
3Reliability
If separate operating ranges are reserved for each radar sensor to eliminate interference, then interference is prevented, but the number of available operating ranges becomes insufficient
Solution Approach 1:
The patent introduces spatial dimensions (location coordinates and orientation angles) as additional degrees of freedom for operating range assignment. Instead of requiring separate operating ranges for each sensor, the system uses the spatial dimension to differentiate sensor operations. Sensors at different locations or orientations can share the same operating range, while the spatial parameters provide sufficient differentiation to prevent interference among all sensors
Data Source
AI summary
A method for low-interference operation of a plurality of radar sensors, which are installed in different vehicles and each emit a transmission signal in an operating range, which is characterized by at least one of the following parameters: frequency, coding, activity time window. Each radar sensor is assigned an operating range according to at least one degree of freedom of movement of the vehicle, in which the radar sensor is installed.