基于鲁棒两级卡尔曼滤波的LEO-LEO激光星间链路建立和维护过程中渐增和突变多普勒频移补偿方法。

IF 3.2 2区物理与天体物理 Q2 OPTICS

Optics express Pub Date : 2025-06-02 DOI:10.1364/OE.553709

Zeyu Xu, Xianfeng Tang, Zhihan Li, Nan Cui, Yongli Zhao, Kun Xu, Lixia Xi, Xiaoguang Zhang

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引用次数: 0

摘要

针对LEO-LEO相干激光星间链路（LISLs）中多普勒频移的问题，提出了一种鲁棒两级卡尔曼滤波（KF）方案。通过旋转归一化建立了双星LEO-LEO LISL模型，分析了补偿链路建立突变和链路维持渐变的必要性。该方案利用具有两组特定参数状态的两阶段KF来实现级联粗补偿和细补偿。在具有宇宙信道的60 Gbaud仿真系统中，该方案可以在光信噪比为18 dB的情况下补偿10 GHz的突变多普勒频移和151.73 MHz/s的渐增多普勒频移漂移速率。

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Robust two-stage Kalman filter scheme for compensating abrupt and gradual Doppler shifts in establishment and maintenance of LEO-LEO laser inter-satellite links.

A robust two-stage Kalman filter (KF) scheme is proposed to address the challenges of Doppler shifts in LEO-LEO coherent laser inter-satellite links (LISLs). A dual-satellite LEO-LEO LISL model is developed through rotational normalization to analyze the necessity of compensating for abrupt shifts in link establishment and gradual shifts in link maintenance. The proposed scheme utilizes a two-stage KF with two sets of specific parameter states to realize cascaded rough and fine compensations. In the 60 Gbaud simulation system with cosmic channel, the proposed scheme can compensate for a 10 GHz abrupt Doppler shift, along with gradual Doppler shift drift rates of 151.73 MHz/s, at an optical signal-to-noise ratio of 18 dB.

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来源期刊

Optics express 物理-光学

CiteScore

6.60

自引率

15.80%

发文量

5182

审稿时长

2.1 months

期刊介绍： Optics Express is the all-electronic, open access journal for optics providing rapid publication for peer-reviewed articles that emphasize scientific and technology innovations in all aspects of optics and photonics.