摘要： 卫星测控分系统负责遥测、遥控信号在卫星与地面站之间的传输。扩频测控体制由于抗干扰性强、保密性好、易于实现多星测控等优势，已经逐渐成为主流测控方式。在测控频段上，X频段由于频率资源丰富且对商业测控开放，已经成为商业航天使用的主要测控频段。根据低轨卫星测控分系统需求，设计了一套X频段扩频测控应答机基带系统，能够实现X频段扩频测控信号的发射和接收。通过优化设计二维捕获、跟踪环路等模块，系统可以满足低轨卫星高动态多普勒下的性能需求。

中图分类号： TN927；V55
文献标识码： A
DOI：10.16157/j.issn.0258-7998.212459
中文引用格式： 鲍大志，邢斯瑞，孙伟，等. 卫星扩频测控基带系统设计[J].电子技术应用，2022，48(9)：81-85.
英文引用格式： Bao Dazhi，Xing Sirui，Sun Wei，et al. Design of baseband system of satellite spread spectrum TT&C[J]. Application of Electronic Technique，2022，48(9)：81-85.

Design of baseband system of satellite spread spectrum TT&C

Abstract： The satellite tracking telemetry and command(TT&C) subsystem is responsible for transmitting telemetry and receiving remote control signals between the satellite and the ground station. Spread Spectrum TT&C system has gradually become the mainstream TT&C mode because of its strong anti-interference, good confidentiality and easy to realize multi Satellite TT&C. In the TT&C frequency band, X frequency band has become the main TT&C frequency band used in commercial spaceflight due to its rich frequency resources and openness to commercial TT&C. According to the requirements of low orbit satellite TT&C subsystem, a baseband system of X band spread spectrum TT&C transponder is designed, which can transmit and receive X band spread spectrum TT&C signal. By optimizing the design of 2D acquisition and tracking modules, the system can meet the performance requirements of low orbit satellites under high dynamic Doppler.

Key words : satellite TT&C；baseband；acquisition and tracking；Doppler