Radar Module Synchronization via Cross-Module Feedback
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Solution Overview
Problem
Existing radar systems face challenges in synchronizing separate radar modules without a common reference signal, especially in environments where sharing a clock is impractical, leading to errors in frequency, time, and phase, which can degrade or lose synchronization, particularly with the advent of higher frequency millimeter wave radars.
Innovation Solution
A processor-based technology synchronizes separate radar modules by determining and applying frequency, time, and phase corrections based on cross-module information and in-module measurement data, eliminating the need for a shared clock source and enhancing synchronization in millimeter wave radars.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If separate radar modules operate without a common reference signal, then device complexity is reduced and ease of operation is improved, but frequency synchronization, time synchronization, and phase synchronization deteriorate
Solution Approach 1:
The patent implements feedback mechanisms where radar modules measure their own transmission and reception timing, detect frequency and phase deviations, and adjust their operation accordingly. This closed-loop feedback enables autonomous synchronization without requiring complex external reference signal distribution infrastructure.
Solution Approach 2:
Each radar module performs self-synchronization by measuring its own transmitted signals and received echoes, detecting frequency and phase errors independently, and correcting its own operation. This self-service approach eliminates the need for shared clock sources and complex inter-module reference signal distribution.
2Measurement precision
If radar modules are synchronized using a common clock source, then frequency synchronization and phase synchronization are improved, but device complexity increases and ease of operation deteriorates
Solution Approach 1:
The patent extracts the synchronization function from the physical clock distribution infrastructure and implements it through software-based measurement and correction algorithms. By taking out the dependency on shared hardware clock sources, the system achieves synchronization through independent measurement and digital correction rather than physical clock signal distribution.
Solution Approach 2:
The patent replaces the mechanical/electrical clock distribution system with a software-based synchronization approach. Instead of physically distributing clock signals through hardware infrastructure, the system uses digital signal processing, timing measurements, and algorithmic corrections to achieve synchronization, substituting mechanical systems with computational methods.
3Measurement precision
If millimeter wave radar frequencies are increased, then detection precision and resolution are improved, but sensitivity to frequency and phase errors increases
Solution Approach 1:
The patent performs preliminary timing and frequency measurements before radar signal processing to detect and correct synchronization errors. By measuring transmission timing, reception timing, and frequency offsets in advance, the system compensates for phase errors before they affect the high-frequency millimeter wave detection, preventing error propagation into the main detection process.
Solution Approach 2:
The patent implements dynamic frequency and phase correction that adapts to changing conditions in real-time. The synchronization system continuously measures frequency offsets and phase deviations, then dynamically adjusts timing and frequency parameters to compensate for errors, enabling the system to maintain synchronization accuracy despite environmental variations and the inherent sensitivity of millimeter wave frequencies.
Data Source
AI summary
Methods and apparatus, including computer program products, are provided for synchronization. In some example embodiments, there may be provided a method. The method may receiving, at a processor, cross module information, the cross module information including target profile information obtained from radar returns received at first radar module and transmitted by a second radar module; and determining, at the processor, a frequency correction, a time correction, and/or a phase correction, the determining based at least on the received cross module information. Related systems, methods, and articles of manufacture are also described.