光通信研究Issue(3)：23-30,8.DOI:10.13756/j.gtxyj.2024.230016
空间激光通信与测距一体化研究
Research on the Integration of Space Laser Communication and Ranging
摘要
Abstract
[Objective]With the continuous advancements in satellite and communication technologies,the integration of space la-ser communication and ranging technology becomes more mature.As deep space exploration,satellite navigation,and other fields continue to develop,there is a growing demand for higher communication capacity and ranging accuracy between satellites.Thus,the need to achieve laser satellite high-speed communication while completing ranging and further improving ranging accuracy,un-der the premise of considering satellite payload and power consumption,has become an urgent issue.[Methods]This article de-signs and implements a coherent communication and ranging integrated system that supports both QPSK and BPSK,based on the principle of dual one way ranging.To further improve the ranging performance,the differential time sampling method is used to obtain the frequency difference and phase difference between the sending clock and the receiving clock through frequency and phase discrimination,thereby achieving higher clock accuracy and correcting the ranging value.[Results]The system can operate stably in an environment where the received optical power is greater than-48 dBm.Different rates can be set for different application re-quirements,with a maximum rate of 5 Gbit/s in QPSK mode and rates of 2.5 Gbit/s,1.25 Gbit/s,and 625 Mbit/s in BPSK mode.The theoretical ranging accuracy of the system can reach a minimum of 53 ps.In normal communication,using Matlab and Vivado to calculate and process ranging data,the ranging accuracy of the system is verified to be less than 0.1 ns.Furthermore,using the differential time sampling method under simulation conditions,the ranging accuracy can be improved to the order of 10-3 of the symbol width,reaching±0.36 cm.[Conclusion]The proposed communication and ranging integrated system can achieve high-precision ranging while achieving high-speed communication,which is of practical significance for future applications of laser satellites.关键词
卫星/激光通信/激光测距/高精度/一体化Key words
satellite/laser communication/laser ranging/high precision/integration分类
信息技术与安全科学引用本文复制引用
王熹,付松年,邓磊,陶坤宇,付森,杨奇,戴潇潇,曹哲玮,沈勤,刘陈..空间激光通信与测距一体化研究[J].光通信研究,2024,(3):23-30,8.基金项目
重点研发计划资助项目(2018YFB1801303) （2018YFB1801303）
深圳市基础研究专项资助项目(JCYJ20200109142010888) （JCYJ20200109142010888）
深圳市协同创新专项资助项目(GJHZ20210705142539008) （GJHZ20210705142539008）
