Cooperative Radar Timing Synchronization via Self-Calibration
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Solution Overview
Problem
Current radar systems face challenges in accurately determining the timing synchronization between devices, which affects the precise location and velocity estimation of targets in cooperative radar sensing scenarios, especially in non-line of sight conditions.
Innovation Solution
A method for determining a timing offset between a first wireless device and a second wireless device based on transmissions received from the second device, allowing for accurate timing synchronization and enabling precise location and velocity estimation of targets through cooperative radar sensing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If cooperative radar sensing is performed without timing synchronization, then device complexity is reduced, but measurement precision of target location and velocity deteriorates
Solution Approach 1:
The system performs self-calibration by having radar devices transmit test signals to each other and automatically calculate timing offsets based on received signal timestamps. Each device serves as both transmitter and receiver, enabling autonomous timing synchronization without external intervention or complex centralized control mechanisms.
Solution Approach 2:
The system changes the timing parameter by calculating and compensating for timing offsets between devices. By measuring the actual transmission and reception timestamps of test signals, the system determines the timing difference and applies compensation to align the timing references of cooperative radar devices, thereby improving measurement precision.
2Measurement precision
If timing offset compensation is implemented, then measurement precision improves, but device complexity increases
Solution Approach 1:
The system implements feedback by having radar devices transmit test signals with timestamps and calculate timing offsets based on the received signals. The calculated timing offset is then fed back into the system to compensate for timing differences in subsequent target detection operations, creating a closed-loop timing synchronization mechanism.
Solution Approach 2:
The system performs preliminary calibration by exchanging test signals and calculating timing offsets before actual target detection begins. This preliminary timing synchronization ensures that subsequent measurements are performed with aligned timing references, improving accuracy without adding complexity to the main detection process.
3Measurement precision
If multiple transmissions are used for timing offset determination, then measurement precision improves, but loss of time increases
Solution Approach 1:
The system uses a practical number of test signal transmissions that provides sufficient timing offset accuracy without performing excessive measurements. By selecting an appropriate number of transmissions (not necessarily all possible combinations), the system achieves adequate precision while minimizing the time consumed during the calibration phase.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach enhances the accuracy of target location and velocity estimation in both line of sight and non-line of sight scenarios, improving the overall performance of cooperative radar systems by compensating for timing differences and propagation delays.
Implementation Method 1
determining a timing offset between a first wireless device and a second wireless device based on at least one transmission received from the second wireless device
Data Source
AI summary
A configuration to determine a timing offset between a first wireless device and a second wireless device in order to synchronize timing between the first wireless device and the second wireless device. The apparatus determines a timing offset between a first wireless device and a second wireless device based on at least one transmission received from the second wireless device. The apparatus determines a location of a target device based at least on the at least one transmission from the second wireless device and the timing offset between the first wireless device and the second wireless device.