卫星相干光通信测速一体化技术研究

许云祥; 许蒙蒙; 孙建锋; 吴斌; 汪勃

doi:doi:10.3788/lop53.120603

激光与光电子学进展, 2016, 53 (12): 120603, 网络出版: 2016-12-14

卫星相干光通信测速一体化技术研究下载： 632次

Integrated Technology of Communication and Velocity Measurement in Satellite Coherent Optical Communication

论文大纲

许云祥 ^1,*许蒙蒙 ²孙建锋 ²吴斌 ¹汪勃 ¹

作者单位

¹ 北京跟踪与通信技术研究所空间目标测量重点实验室, 北京 100094

² 中国科学院上海光学精密机械研究所激光通信及检验技术重点实验室, 上海 201800

光通信卫星测速频率估计相位估计多普勒频移 optical communications satellite velocity measurement frequency estimation phase estimation Doppler frequency shift

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摘要

为解决卫星相干光通信中光锁相环较难实现、信息捕获时间过长等问题, 基于光纤通信中数字信号处理器(DSP)的频偏、相偏开环补偿技术, 提出了一种基于外差探测实现卫星相干通信测速一体化的方法。从理论上分析了该方法的原理和可行性, 并通过仿真对通信和测速两种模式进行了验证。仿真结果表明, 在通信模式下, 当接收功率高于-48.14 dBm时, 系统的误码率优于10-4; 在测速模式下, 当信噪比高于17 dB时, 卫星径向相对速度估计精度优于0.62 m/s。

Abstract

To deal with the difficulty in realizing optical phase-locked loop (OPLL) and shorten capture time in satellites coherent light communication, a heterodyne detection and digital signal processor (DSP) based integrated method of communication and velocity measurement is proposed, which uses the frequency shift estimation and phase recovery technology in optical fiber communication. Principle and feasibility of the method are analyzed theoretically and verified experimentally. Simulation results show that when the received power is higher than -48.14 dBm under the mode of communication, the bit error rate (BER) of the system is better than 10-4, and when the signal noise ratio (SNR) is higher than 17 dB under the mode of velocity measurement, the estimation accuracy of the satellite radial relative velocity is superior to 0.62 m/s.

参考文献

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许云祥, 许蒙蒙, 孙建锋, 吴斌, 汪勃. 卫星相干光通信测速一体化技术研究[J]. 激光与光电子学进展, 2016, 53(12): 120603. Xu Yunxiang, Xu Mengmeng, Sun Jianfeng, Wu Bin, Wang Bo. Integrated Technology of Communication and Velocity Measurement in Satellite Coherent Optical Communication[J]. Laser & Optoelectronics Progress, 2016, 53(12): 120603.

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