Partially Coordinated Radar Clock Mismatch Compensation
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Solution Overview
Problem
Radar systems face challenges in synchronizing timing between a transmitter and receiver that are capable of motion relative to each other, which complicates accurate determination of spatial information for targets in their field of view.
Innovation Solution
A partially coordinated radar system that uses spatial position indicators and communication devices to determine timing, frequency, and phase mismatches between the transmitter and receiver, generating compensation signals to adjust local timing clocks and oscillators, allowing for virtual synchronization and accurate spatial information estimation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If timing synchronization is implemented between transmitter and receiver, then accurate spatial information determination is achieved, but system complexity increases due to the need for coordination mechanisms
Solution Approach 1:
The system uses the radar signals themselves to determine spatial information and calculate timing offsets, rather than requiring external synchronization infrastructure. The transmitter and receiver independently measure spatial parameters and use these measurements to compute their relative timing relationship, making the system self-synchronizing.
Solution Approach 2:
The system continuously measures spatial information from radar returns and uses this feedback to calculate and adjust timing offsets. By monitoring the spatial relationship between transmitter and receiver and comparing it with expected geometry, the system dynamically compensates for timing mismatches.
2Device complexity
If the transmitter and receiver remain independent without synchronization, then system complexity is reduced, but timing and frequency mismatches degrade measurement precision
Solution Approach 1:
Spatial information measurements serve as an intermediary that links the independent transmitter and receiver operations. By measuring spatial parameters such as angle of arrival and time of flight, the system creates a common reference frame that enables timing offset calculation without requiring direct synchronization between the two units.
Solution Approach 2:
The system transforms the problem from synchronizing timing directly to measuring spatial parameters and deriving timing information from them. By changing the approach from time-synchronization to space-measurement, the system achieves accurate spatial information determination while maintaining operational independence.
3Measurement precision
If continuous synchronization compensation is applied, then measurement precision is maintained despite motion, but energy consumption increases
Solution Approach 1:
Instead of continuous real-time synchronization, the system performs spatial measurements and timing offset calculations at discrete intervals based on radar pulse transmissions. This periodic approach maintains measurement accuracy while significantly reducing computational and energy overhead compared to continuous synchronization.
Data Source
AI summary
A partially coordinated radar system is provided comprising: a radar transmitter; a radar receiver; processing circuitry; a first spatial information indicator; a side channel communication system to send radar waveform configuration information from the transmitter to the receiver; processing circuitry to use the waveform information to configure the radar receiver to receive the waveform signal; determine radar-based spatial information based upon the radar waveform signal; determine a mismatch of clocks or local oscillators of transmitter and receiver; and generating a compensation signal indicating correction information to compensate for the determined at least one mismatch.