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Wideband Optical Detector of Ultrasound for Medical Imaging Applications

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High-Accuracy Phase Frequency Detection Technology Based on BDS Time and Frequency Signals.

Baoqiang Du¹, Lanqin Tan¹

¹School of Information Science and Engineering, Hunan Normal University, Changsha 410081, China.

Sensors (Basel, Switzerland)

|July 27, 2024

Summary

A new phase group synchronization technique enhances Beidou satellite signal accuracy. This high-accuracy phase synchronization technology achieves 10 ps accuracy, offering benefits for various advanced applications.

Keywords:

BDS frequency measurement greatest common factor period phase measurement

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Area of Science:

Satellite Technology
Signal Processing
Metrology

Background:

Accurate time and frequency signal synchronization is crucial for advanced technologies.
Existing phase synchronization methods face limitations in precision and complexity.

Purpose of the Study:

To propose a high-accuracy phase frequency detection technology for Beidou satellite signals.
To achieve precise phase synchronization using phase group synchronization.

Main Methods:

Utilizing Beidou receiver and satellite signals as frequency standards.
Employing a phase coincidence detector and a different frequency phase detector for synchronization.
Generating phase difference signals to control synchronization.

Main Results:

The proposed technology achieves a phase synchronization accuracy of 10 ps.
The system demonstrates ps-level delay resolution.
It exhibits characteristics of low phase noise and simple circuit structure.

Conclusions:

The developed phase group synchronization technology offers superior accuracy and efficiency.
This method presents a low development cost and high synchronization accuracy.
It has broad applicability in satellite positioning, navigation, communications, and radar systems.