Vehicle Radar Frequency Band Allocation for Interference Reduction
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Solution Overview
Problem
The existing operating frequency band of vehicle-mounted radars is random, leading to low utilization efficiency of the entire frequency resource segment and increased mutual interference between radars, which reduces detection probability and increases false alarm probability, impacting driving safety and comfort.
Innovation Solution
A signal transmission method and apparatus that determine a transmit frequency band with N sub-frequency bands, ensuring the bandwidth of the transmit frequency band is not less than the operating bandwidth of the radar, and the sum of bandwidths of any N−1 sub-frequency bands is less than the operating bandwidth, thereby standardizing the transmit frequency band and reducing interference between radars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the operating frequency band of vehicle-mounted radars is random, then the deployment flexibility is improved, but the resource utilization efficiency deteriorates and mutual interference increases
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the operating frequency band parameters of radars. Instead of using random frequency bands, the system changes the frequency band parameters based on detected environmental conditions and interference levels, optimizing both resource utilization and deployment flexibility. The radar controller modifies frequency band parameters in real-time to adapt to changing scenarios.
Solution Approach 2:
The patent implements feedback mechanisms where radar detectors monitor the frequency band usage and interference levels, then feed this information back to the radar controllers. This feedback loop enables the system to adjust frequency band allocation dynamically, improving resource utilization efficiency while maintaining deployment flexibility through adaptive response to actual usage patterns.
2Adaptability or versatility
If the operating frequency band of vehicle-mounted radars is random, then the deployment flexibility is improved, but the mutual interference between radars increases
Solution Approach 1:
The patent introduces an intermediary frequency band management system that mediates between multiple radars. This intermediary layer coordinates frequency band allocation, detecting usage patterns and adjusting radar operating bands to minimize mutual interference while preserving deployment flexibility. The intermediary acts as a coordinator that balances individual radar needs with overall system harmony.
Solution Approach 2:
The patent dynamically changes frequency band parameters based on detected interference levels and usage patterns. By modifying frequency band parameters in real-time, the system reduces mutual interference while maintaining the ability to deploy radars flexibly in different scenarios. The parameter changes are adaptive responses to actual operating conditions.
3Adaptability or versatility
If the transmit frequency band is not standardized, then the adaptability to different scenarios is improved, but the detection probability decreases and false alarm probability increases
Solution Approach 1:
The patent optimizes transmit frequency band parameters by changing them based on detected scenarios and interference levels. Instead of using non-standardized random bands, the system adjusts frequency parameters to standardized optimal values for different scenarios, improving detection probability while maintaining scenario adaptability through parameter optimization.
Solution Approach 2:
The patent performs preliminary frequency band optimization by pre-determining optimal frequency parameters for different scenarios. Before actual radar operation in a given scenario, the system prepares the appropriate frequency band parameters, ensuring that detection probability is maximized from the outset while maintaining adaptability to various operational contexts.
4Adaptability or versatility
If the transmit frequency band is not standardized, then the adaptability to different scenarios is improved, but the false alarm probability increases
Solution Approach 1:
The patent reduces false alarm probability by optimizing transmit frequency band parameters for different scenarios. By changing frequency parameters to standardized optimal values rather than using non-standardized random bands, the system minimizes interference and false detections while preserving the ability to adapt to various operational scenarios through parameter adjustment.
Data Source
AI summary
A signal transmission method includes a radar detection apparatus selecting a transmit frequency band from a predefined or pre-specified first frequency band. The first frequency band is pre-divided into M sub-frequency bands, and the transmit frequency band includes N sub-frequency bands in the M sub-frequency bands, where a bandwidth of the transmit frequency band is greater than or equal to an operating bandwidth of the radar detection apparatus. A sum of bandwidths of any N−1 sub-frequency bands in the N sub-frequency bands is less than the operating bandwidth of the radar detection apparatus. In addition, a minimum quantity of sub-frequency bands is used to transmit a signal.