| 高精度星地测距的多址干扰并行对消技术 |
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| 作者姓名： | 张国亭 董光亮 刘保国 郭永强 曾富华 |
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| 作者单位： | 1.国防科技大学空天科学学院 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 成都 610036 |
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| 基金项目： | 高分专项预研（GFZX04020801） |
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| 摘 要： | 目前，在航天测控系统中广泛采用扩频体制，但随着多通道扩频技术和多站测距系统的发展，测控系统面临的测量环境越来越复杂，对伪距测量精度产生较大影响。其中，多站测距系统中存在的强信号干扰和多址干扰，会导致测距精度下降。本文提出了一种基于并行干扰对消的高精度星地测距技术，通过信号处理重构和对消接收信号中的干扰信号，得到纯净的期望信号，从而抑制码分多址带来的测量误差，以提升测量精度，并通过仿真和试验验证了算法的可行性和优越性。
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| 关 键 词： | 高精度测距 测控系统 并行干扰对消 非相干扩频 |
| 收稿时间： | 2023/5/10 0:00:00 |
| 修稿时间： | 2023/6/14 0:00:00 |
High-precision ranging technique based on parallel interference cancellation for TT&C systems |
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| Authors: | ZHANG Guoting DONG Guangliang LIU Baoguo GUO Yongqiang ZENG Fuhua |
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| Institution: | 1.College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China;2.Beijing Institute of Tracking and Telecommunications Technology, Beijing 100094,China;3.Southwest China Institute of Electronic Technology, Chengdu 610036, China |
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| Abstract: | The spread spectrum technique is widely used in the field of aerospace TT&C systems. However, with the development of multi-channel spread spectrum and multi-station ranging technology, the TT&C systems have large effects on the accuracy of pseudo-range measurements in increasingly complex measurement environment. The strong signal interference and multiple access decline the ranging accuracy in multi-station ranging systems. A high-precision ranging technology based on parallel interfe-rence cancellation is proposed. To suppress the measurement errors caused by code division multiple access and improve the ranging accuracy, the multiple access interferences is reconstructed and canceled to obtain pure desired signals. The simulations and experiments verify that the algorithm have superior feasibility and superiority. |
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| Keywords: | High-precision ranging method TT& C system Parallel interference cancellation Non-coherent spread spectrum |
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