基于载波平滑伪码的高精度航天扩频体制测距技术  

High-Precision Spread Spectrum Ranging Technology Based on Carrier Smoothed Pseudo-Code

作　　者：张国亭 刘保国[2] 王宏[2] 徐茂格[3] 董光亮[2] ZHANG Guoting;LIU Baoguo;WANG Hong;XU Maoge;DONG Guangliang(College of Aerospace Science and Engineering,National University of Defense Technology,Changsha 410073,Hunan,China;Beijing Institute of Tracking and Telecommunications Technology,Beijing 100094,China;Southwest China Institute of Electronic Technology,Chengdu 610036,Sichuan,China)

机构地区：[1]国防科技大学空天科学学院,湖南长沙410073 [2]北京跟踪与通信技术研究所,北京100094 [3]中国西南电子技术研究所,四川成都610036

出　　处：《上海航天（中英文）》2023年第4期104-108,共5页Aerospace Shanghai（Chinese&English）

摘　　要：在航天扩频测控系统中,伪码测距技术可以有效避免相位模糊,但是码长也限制了其相位测量精度,而载波测距技术则具有更高的相位测量精度。针对扩频测控体制,提出了一种基于载波平滑伪码的高精度航天扩频体制测距技术,该技术利用锁相环获得的载波相位对伪码值进行平滑,在保留伪码测距无相位模糊特性的基础上进一步提升测量精度,从而减小测距接收机的随机误差。仿真结果和试验数据表明:该方法能有效提高星地测距精度,测量精度达到毫米量级,具有很强的实用价值。Due to the efficient resolution of phase ambiguity,the pseudo-code ranging technology has been widely applied to the spread spectrum tracking,telemetering,and control(TT&C)system.However,the phase measurement accuracy is naturally limited to the code length.By contrast,the carrier ranging technology shows higher phase measurement accuracy.In this paper,a high-precision ranging technology is proposed based on the carrier smoothed pseudo-code for non-coherent spread spectrum measurement system.Concretely,the carrier phase obtained by phase-locked loop is used to smooth the pseudo-code.In this way,the measurement accuracy is improved,while the characteristic of pseudo range measurement without phase ambiguity retains.Thereby,the random error of the ranging receiver is furtherly reduced.Simulation results and experimental data show that the proposed technology can effectively enhance the accuracy of satellite-ground ranging,and the measurement error is improved up to the millimeter level,which has strong practical value.

关 键 词：高精度测距技术 航天测控 载波平滑伪码 非相干扩频 相位模糊 

分 类 号：TN98[电子电信—信息与通信工程]