Radar Sampling Clock Generation for Multi-Device Synchronization
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Solution Overview
Problem
Existing radar systems face challenges in achieving synchronized processing of signals across multiple radar devices due to the high effort required in routing sampling clock signals, which limits flexibility and increases complexity in system design.
Innovation Solution
The implementation generates a sampling clock signal within the radar device using a data clock signal, eliminating the need for additional input pins and reducing the complexity of signal propagation, by employing a sampling clock generation circuit that includes a frequency divider and phase modifier to ensure synchronized operation across devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sampling clock signal is distributed synchronously to all radar devices using additional routing paths, then synchronized processing of signals across multiple radar devices is achieved, but device complexity and routing effort increase significantly
Solution Approach 1:
The patent combines the data signal transmission path with the clock signal transmission path by using the same data bus to carry both the data clock signal and the sampling clock signal. This merging eliminates the need for separate routing paths for clock signals, thereby reducing routing complexity while maintaining synchronization across multiple radar devices.
Solution Approach 2:
The data bus is given multi-functionality by using it for both data transmission and clock signal distribution. The same physical infrastructure serves dual purposes: carrying radar data signals and distributing synchronized clock signals to all devices, thus eliminating dedicated clock routing infrastructure.
2Reliability
If high effort is spent on routing the sampling clock signal to guarantee synchronous arrival at each radar device, then synchronized sampling is achieved, but flexibility in setting up the radar system is limited
Solution Approach 1:
By merging the clock signal transmission with the existing data bus infrastructure, the system gains flexibility in configuration and placement of radar devices without requiring precise control over clock signal propagation paths. Devices can be added or repositioned independently as long as data bus connectivity is maintained.
3Reliability
If additional input pins are used to receive external sampling clock signals, then synchronized operation is achieved, but the number of required input pins and overall system complexity increases
Solution Approach 1:
The data bus serves multiple functions simultaneously: it transmits radar data signals and distributes synchronized clock signals to all devices. This eliminates the need for additional dedicated clock input pins, reducing the pin count and simplifying device interfaces while maintaining synchronized operation.
Data Source
AI summary
A radar device comprises a data communication input interface configured to receive a data clock signal for a data bus and an analog to digital converter configured to sample a signal at time instants given by a sampling clock signal. In an implementation, a sampling clock generation circuit is configured to generate the sampling clock signal based on the data clock signal.