Phase synchronization algorithm for high-speed space optical communication modulation baseband signal based on FPGA

Dizhu Wang; Meichun Su; Yi Ren; Jinzhong Zuo; Yi Jin; Changzhi Xu

doi:10.1117/12.3030365

3 June 2024 Phase synchronization algorithm for high-speed space optical communication modulation baseband signal based on FPGA

Dizhu Wang, Meichun Su, Yi Ren, Jinzhong Zuo, Yi Jin, Changzhi Xu

Author Affiliations +

Proceedings Volume 13182, 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024); 131820D (2024) https://doi.org/10.1117/12.3030365
Event: 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024), 2024, Kunming, China

Abstract

The phase synchronization accuracy of modulated baseband signal in high-speed space optical communication directly affects the error rate and ranging performance of the communication system. At present, high-speed modulation baseband signal have problems such as low phase synchronization accuracy and complex hardware implementation. This paper proposes a high-speed modulation baseband signal phase synchronization algorithm based on FPGA. The phase of high-speed baseband signal transmission clock is adjusted in real time through closed-loop control to realize the phase synchronization of I and Q high-speed signals. The experimental results show that the phase synchronization accuracy of the high-speed optical modulation baseband signal with code rate of 5Gbps is less than 5ps; The communication sensitivity is better than -46dBm, and the ranging accuracy is better than 3mm. Compared with traditional methods, synchronization accuracy, communication sensitivity and ranging accuracy have been significantly improved, and low hardware complexity.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Dizhu Wang, Meichun Su, Yi Ren, Jinzhong Zuo, Yi Jin, and Changzhi Xu "Phase synchronization algorithm for high-speed space optical communication modulation baseband signal based on FPGA", Proc. SPIE 13182, 2024 International Conference on Optoelectronic Information and Optical Engineering (OIOE 2024), 131820D (3 June 2024); https://doi.org/10.1117/12.3030365

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KEYWORDS

Phase shift keying

Modulation

Clocks

Ranging

Optical communications

Field programmable gate arrays

Interpolation

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