宇航学报 ›› 2014, Vol. 35 ›› Issue (12): 1450-1456.doi: 10.3873/j.issn.1000-1328.2014.12.015

• 电子信息 • 上一篇    下一篇

伪码测距抗干扰容限分析

瞿智,杨俊,陈建云   

  1. 国防科学技术大学机电工程与自动化学院,长沙 410073
  • 收稿日期:2013-12-24 修回日期:2014-06-18 出版日期:2014-12-15 发布日期:2014-12-25

Analysis of Anti Jamming Margin of Pseudo Random Code Ranging

QU Zhi, YANG Jun, CHEN Jian yun   

  1. College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, China
  • Received:2013-12-24 Revised:2014-06-18 Online:2014-12-15 Published:2014-12-25

摘要:

统一考虑射频干扰对伪码测距系统中码环稳定性能和测距精度性能的影响,推导并定义了系统稳定性能容限和测距精度性能容限,综合这两个容限给出了一定测距精度指标约束下的测距抗干扰容限。同时,设计了容限参考因子以定量分析两个性能容限对测距抗干扰容限的影响,并给出了一定应用场景中的容限和参考因子的快速计算方法。本文还针对窄带干扰环境,给出了更加简捷的分析方法,并通过数值分析进行了具体说明。测距抗干扰容限的分析与设计,科学全面且简捷高效,能够有效指导伪码测距系统的结构参数设计与系统性能评估。

关键词: 伪码测距, 抗干扰容限, 系统稳定性, 测距精度, 参考因子

Abstract:

Considering effects of radio frequency interference on the stability of tracking loop and ranging accuracy, the AJ margin of system stability and AJ margin of ranging accuracy are derived and defined, and the two margins are integrated into AJ margin of ranging system with certain ranging accuracy requirement. To quantitatively analyze the weight of two former margins in the later margin, a reference factor is designed, and rapid calculation methods for the AJ margin and reference factor in certain application scenario are provided. For narrow-band interference condition, a simpler method is given, and numerical analysis is provided with more detailed description. The design and analysis of the AJ margin are comprehensive and simple, which is quite useful in the structural parameters design and performance evaluation of pseudo-random code ranging system.

Key words: Pseudo-random code ranging, Anti-jamming margin, System stability, Ranging accuracy, Reference factor

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