Radar Sensor Synchronization Network Segmentation
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Solution Overview
Problem
Current radar sensor systems face challenges in achieving high accuracy and reliability for autonomous or semi-autonomous driving functions due to limitations in radar resolution and signal transit time, which are exacerbated by long signal lines causing losses and complexity in signal processing.
Innovation Solution
A radar sensor system with a synchronization network connecting HF components, allowing for synchronized operating frequencies and short line lengths, which reduces signal transit time and maintains low compensation effort, enabling improved distance and angular resolution. The system arranges HF components in close proximity with defined groups connected by synchronization lines, allowing one pair to compensate for another, and allows each component to act as a synchronization master, enhancing flexibility and reducing cable length.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If long signal lines are used to connect RF components, then the system can accommodate more components and provide better coverage, but signal losses increase and resolution deteriorates
Solution Approach 1:
The system divides RF components into multiple groups, where each group is closely spaced and connected by short synchronization lines. This segmentation allows the system to accommodate more RF components while keeping individual line lengths short, thereby reducing signal losses and maintaining resolution.
2Quantity of substance
If long signal lines are used to connect RF components, then the system can accommodate more components, but range resolution and angular resolution are reduced
Solution Approach 1:
By segmenting the RF components into closely spaced groups with short synchronization lines, the system maintains short signal propagation paths. This ensures that even with more components, the range resolution and angular resolution remain high because the synchronization error remains minimal.
3Quantity of substance
If long signal lines are used to connect RF components, then the system can accommodate more components, but compensation effort increases
Solution Approach 1:
The system segments RF components into groups where members are closely spaced and connected by short lines. This reduces the propagation time differences between components, thereby reducing the compensation effort required in signal processing while still accommodating a large number of components.
4Length of stationary object
If RF components are arranged in close proximity, then cable length is reduced and signal losses are minimized, but system layout becomes more complex
Solution Approach 1:
The system divides the RF components into multiple closely spaced groups. This segmentation allows components to be arranged in close proximity within each group, reducing cable length and signal losses, while the modular group structure helps manage the overall system layout complexity.
5Adaptability or versatility
If each RF component acts as synchronization master, then flexibility increases and redundancy is improved, but control complexity increases
Solution Approach 1:
The system allows any RF component to act as the synchronization master, making each component universal and interchangeable. This multi-functionality increases flexibility and redundancy, as any component can take over the master role if needed, while the standardized synchronization protocol keeps control complexity manageable.
Data Source
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AI summary
The invention relates to a radar sensor system (100) comprising: a defined number of RF components (10a... 10d); each of the RF components (10a... 10d) comprising in each case at least one antenna for transmitting and/or receiving radar waves and at least one antenna controller for operating the at least one antenna; and a synchronisation network (20) which is connected to all RF components (10a... 10d) and via which an operating frequency of all RF components (10a... 10d) can be synchronised by at least one of the RF components.