Vehicle-Heading Radar Band Switching for Interference Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing vehicular radar systems experience interference due to uncoordinated transmission in the same frequency band, leading to inefficiencies and the need for improved interference reduction methods.
Innovation Solution
A radar system that adjusts its frequency band operation based on the vehicle's heading and direction, using a control unit to determine reserved and extended frequency bands, allowing the radar transceiver to operate in a larger bandwidth when no interference is detected and backing off to a reserved band when interference occurs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If radar transceivers transmit in the same frequency band without coordination, then uncoordinated transmission is enabled, but interference between radar transceivers occurs
Solution Approach 1:
The patent dynamically changes the frequency band parameter based on detected interference conditions. The radar transceiver operates in an extended frequency band when no interference is detected, improving distance resolution, and switches to a reserved frequency band when interference is detected, eliminating harmful interference effects
Solution Approach 2:
The system dynamically adjusts its operating frequency band based on real-time detection of interfering radar transceivers. The control unit monitors for interference and switches between extended and reserved frequency bands, making the system adaptive to changing environmental conditions
2Object-affected harmful factors
If a reserved frequency band is used for all directions, then interference is avoided, but bandwidth is reduced and distance resolution deteriorates
Solution Approach 1:
The system changes the frequency band parameter dynamically based on interference detection. When no interference is present, the extended frequency band provides larger bandwidth and improved distance resolution. When interference is detected, the system switches to the reserved frequency band to eliminate interference, thus optimizing both parameters under different conditions
3Measurement precision
If the extended frequency band is used continuously, then distance resolution is improved, but interference from other radar transceivers increases
Solution Approach 1:
The system dynamically switches between extended and reserved frequency bands based on real-time interference detection. The control unit monitors for interfering radar transceivers and adjusts the operating band accordingly, making the system adaptive to changing environmental conditions rather than using a fixed frequency band
4Productivity
If radar transceivers operate in opposite directions with the same frequency band, then frequency band utilization is maximized, but severe interference occurs
Solution Approach 1:
The patent assigns different reserved frequency bands to radar transceivers operating in opposite directions. Each transceiver has a reserved band specific to its directional operation, ensuring that transceivers facing each other use different frequency bands and avoid severe head-on interference, while still allowing extended band usage when interference-free
Data Source
AI summary
A radar system (201) for a vehicle (200), comprising a control unit (203) and a radar transceiver arrangement (202) with at least one ego radar transceiver (204), where, for the at least one ego radar transceiver (204), the control unit (203) is adapted to: determine a present direction (D, DA) of the ego radar transceiver (204), determine a reserved frequency band (B0) corresponding to the present direction (D, DA), and to determine a first extended frequency band (B1) comprising and extending beyond the reserved frequency band (B0), wherein the control unit is further adapted to: detect presence of an interfering radar transceiver in the first extended frequency band, and operating the ego radar transceiver (204) in the first extended frequency band (B1) in case an interfering radar transceiver is not detected in the first extended frequency band and operating the ego radar transceiver (204) in the reserved frequency band (B0) otherwise.