深空激光扩频通信测距一体化技术(特邀)
Integrated Technology of Laser Spread Spectrum Communication and Ranging for Deep Space(Invited)
李超洋 1孙建锋 2卢智勇 3周煜 4张龙坤 3姜玉鑫 3许玲玲 3潘含蕊 3贾弘辉 3袁浩铭 3陈卫标 5贺辉4
作者信息
- 1. 中国科学技术大学光学与光学工程系,安徽 合肥 230026;中国科学院上海光学精密机械研究所空间激光传输与探测技术重点实验室,上海 201800
- 2. 中国科学院上海光学精密机械研究所航天激光工程部,上海 201800;上海卫星互联网研究院有限公司,上海 200120;上海市卫星互联网重点实验室,上海 200120
- 3. 中国科学院上海光学精密机械研究所空间激光传输与探测技术重点实验室,上海 201800
- 4. 中国科学院上海光学精密机械研究所航天激光工程部,上海 201800
- 5. 中国科学院上海光学精密机械研究所航天激光工程部,上海 201800;中国科学院上海光学精密机械研究所空间激光传输与探测技术重点实验室,上海 201800
- 折叠
摘要
在深空探测中,以微波为载体的通信、测距载荷面临链路损耗大、频谱资源紧张等问题.相比微波,激光光束发散角小,能量更为集中,可达更远的传输距离,以激光为载体的通信、测距载荷具有体积小、质量轻等优势.搭建了一套激光相干外差扩频通信测距一体化深空探测系统,提出了一种基于曲线模型的插值重采样方法,并对该曲线模型进行了理论仿真和实验验证.该模型由系统先验信息构建,是伪随机码相位差的线性函数.实验结果表明,对于静态目标,测距偏差不超过0.55 mm,测距精度不超过0.42 mm.对于动态目标,测距偏差不超过0.59 mm.静态和动态目标测距中实现了零误码通信.此外,扩频通信测距一体化设计应用于深空导航和深空时频同步,可以提高实时性.
Abstract
In deep space exploration,microwave-based communication and ranging payloads face problems such as high link loss and tight spectrum resources.Compared with microwave,laser beam has a small divergence angle and more concentrated energy,which can reach a longer transmission distance,and the laser-based communication and ranging payloads have the advantages of small size and light weight.In this paper,an integrated deep space exploration system based on laser coherent heterodyne spread spectrum communication and ranging is constructed,an interpolation resampling method based on a curve model is proposed,and theoretical simulation and experimental verification of the curve model are carried out.The model is constructed from a priori information of the system and is a linear function of the pseudo-random code phase difference.The experimental results show that for static targets,the ranging deviation is no more than 0.55 mm and the ranging precision does not exceed 0.42 mm,and for dynamic targets,the ranging deviation is no more than 0.59 mm.Communication with zero bit rate is also realized in ranging for static and dynamic target.In addition,the integrated design of spread-spectrum communication and ranging is applied to deep space navigation and deep space time-frequency synchronization,which can improve the real-time performance.
关键词
扩频通信/插值重采样/通信测距一体化/深空探测Key words
spread spectrum communication/interpolation resampling/ranging and communication integration/deep space exploration引用本文复制引用
出版年
2024
NETL
NSTL
万方数据