窄带干扰下北斗卫星导航信号性能分析

发布时间：2018-07-04 10:14

本文选题：北斗卫星导航系统 + 信号结构　；参考：《计算机应用研究》2014年02期

【摘要】：在介绍近期公布的北斗卫星导航系统空间信号接口控制文件(interface control document)中B1频点QPSK(quadrature phase shift keying,正交相移键控)调制信号及测距码构成的基础上,针对窄带干扰对卫星导航信号性能影响问题,通过建立卫星导航直接序列扩频通信系统模型,对窄带干扰下的北斗卫星导航系统解扩处理增益、相关解扩处理变化规律、误码性能以及对导航信号等效载噪比的影响进行了分析和数字仿真。仿真结果表明,窄带干扰下,导航信号性能降低程度与干扰实施位置、扩频码特性、调制样式等有关,导航信号的性能改善需综合考虑干扰特性、扩频特性及调制样式等方面的影响。
[Abstract]:On the basis of introducing the composition of B1 frequency point QPSK (quadrature phase shift keying, orthogonal phase shift keying) modulation signal and range finder in the space signal interface control file (interface control document) of the Beidou satellite navigation system (Beidou satellite navigation system), the influence of narrowband interference on the performance of satellite navigation signal is established by establishing satellite navigation direct. The model of sequence spread spectrum communication system is used to analyze and simulate the influence of the despreading processing gain, the related despreading process, the error code performance and the influence of the equivalent carrier noise ratio of the navigation signal under the narrow band interference. The simulation results show that the performance reduction of the navigation signal and the interference implementation under the narrowband interference are shown. Location, the characteristics of the spread spectrum code, modulation mode and so on. The performance improvement of the navigation signal must take into account the interference characteristics, spread spectrum characteristics and modulation mode.
【作者单位】：西北工业大学无人机特种技术重点实验室;91504部队;
【基金】：2010年西北工业大学科技创新基金资助项目(2010KJ0140) 2012年西北工业大学科技创新基金资助项目
【分类号】：TN967.1

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