低轨卫星激光通信实时算法研究(特邀)  

Real-Time Algorithm for Low-Orbit Satellite Laser Communication(Invited)

作　　者：杨奇 王宜州 王元祥[2] 范峰 黎景 梁子鹏 邱天 戴潇潇 Yang Qi;Wang Yizhou;Wang Yuanxiang;Fan Feng;Li Jing;Liang Zipeng;Qiu Tian;Dai Xiaoxiao(Wuhan National Laboratory for Optoelectronics,School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;School of Cyber Science and Engineering,Huazhong University of Science and Technology,Wuhan 430074,Hubei,China;Beijing Research Institute of Telemetry,Beijing 100094,China;Optics Valley Laboratory,Wuhan 430074,Hubei,China)

机构地区：[1]华中科技大学光学与电子信息学院,武汉光电国家研究中心,湖北武汉430074 [2]华中科技大学网络空间安全学院,湖北武汉430074 [3]北京遥测技术研究所,北京100094 [4]湖北光谷实验室,湖北武汉430074

出　　处：《激光与光电子学进展》2024年第1期72-80,共9页Laser & Optoelectronics Progress

基　　金：光电国家研究中心创新专项、湖北光谷实验室创新科研项目(OVL2021BG002)。

摘　　要：针对低轨卫星激光通信实时化、低功耗的应用场景,为了解决独立时钟源及传输信道复杂等问题,对时钟恢复算法和前向纠错码进行了改进与优化,实现了资源占用低、时延低且功耗为0.129 W和1.199 W的实时化全数字时钟恢复算法和低密度奇偶校验(LDPC)编译码。搭建了桌面演示系统,成功演示了二进制相移键控(BPSK)调制/相干探测、通信速率为1.024 Gbit/s的实时空间光传输,其中时钟误差约为1.50×10^(-4)。We optimized the clock recovery algorithm and forward error correction code to address the challenges associated with an autonomous clock source and intricate transmission channel in a real-time,low-power-consumption scenario for low-orbit satellite laser communication.The successful implementation of this optimization includes an alldigital clock recovery algorithm and a low-density parity check(LDPC)compilation code,demonstrating minimal resource consumption,low latency,and power consumption of only 0.129 W and 1.199 W,respectively.Subsequently,we constructed a desktop demonstration system that effectively showcases real-time spatial optical transmission using binary phase shift keying(BPSK)modulation and coherent detection at a communication rate of 1.024 Gbit/s.Notably,the clock error in this system is approximately 1.50×10~(-4).This achievement reflects a fine balance between performance and efficiency in the context of low-orbit satellite laser communication.

关 键 词：低轨卫星 相干光通信 实时 低功耗 

分 类 号：TN929[电子电信—通信与信息系统]