星基引力波探测中星间激光测距与通信一体化的一种新方案
A Novel Scheme for Inter-Satellite Integrated Laser Ranging and Communication in Space-Based GW Detection
- National Gravitation Laboratory, MOE Key Laboratory of Fundamental Physical Quantities Measurement, and School of Physics, Huazhong University of Science and Technology（华中科技大学物理学院，引力实验室，教育部基础物理量测量重点实验室）
- School of Electronics and Communication Engineering, Sun Yat‑sen University（中山大学电子与信息工程学院）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
针对星基引力波探测中现有星间激光测距与通信一体化方案噪声过大的问题，提出将数据编码PRN信号先调制到USO时钟再调制到激光载波的新方案，理论分析与仿真证明可显著抑制噪声。
AI中文摘要：
在星基引力波（GW）探测系统中，采用伪随机噪声（PRN）码进行星间测距时，在目前采用的一体化方案下，数据编码的PRN信号会引入过大的激光相位测量噪声。为抑制该噪声，本文提出了一种星间一体化激光链路方案，在该方案中，用于星间绝对距离测量与通信的数据编码PRN信号先相位调制到超稳振荡器（USO）时钟信号上，再相位调制到激光载波上。理论分析和仿真结果表明，与目前采用的方案相比，所提方案能显著抑制噪声，同时由数据编码PRN信号引起的时钟噪声传递噪声被限制在要求范围之内。
英文摘要：
Adopting pseudo-random noise (PRN) codes for inter-satellite ranging, the resulting data-encoded PRN signal induces excessive laser phase measurement noise under the currently adopted integrated scheme in space-based gravitational wave (GW) detection systems. To suppress the noise, a scheme of inter-satellite integrated laser link is presented in this Letter, in which the data-encoded PRN signal for inter-satellite absolute distance measurement and communication is phase-modulated onto the ultra-stable oscillator (USO) clock signal before phase modulation onto the laser carrier. Theoretical analysis and simulation results show that in the proposed scheme the noise is significantly suppressed compared with the currently-adopted one, while the noise stemming from the data-encoded PRN signal on clock noise transfer is limited within the requirement.
