高轨SAR信号对GNSS接收机性能影响评估方法  

Evaluation method for the performance of GNSS receiver influenced by GEO SAR signal

作　　者：赵冠先 赵思浩[1] 崔晓伟[1] Zhao Guanxian;Zhao Sihao;Cui Xiaowei(Department of Electronic Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]清华大学电子工程系

出　　处：《电子技术应用》2020年第3期14-18,共5页Application of Electronic Technique

摘　　要：由于高轨SAR卫星信号设计频段可能与多种已投入使用的GNSS信号所在频段共用或重叠,导致地面GNSS接收机受到由高轨SAR信号产生的脉冲射频干扰。为评估高轨SAR信号对GNSS地面接收机性能的影响,提出了一种基于ITU相关标准的参数化理论模型。该模型使用"源-路径-接收机"的分析方法,分别从高轨SAR信号、信号传播路径以及用于干扰评估的接收机模型三个方面提取参数,然后根据ITU相关标准,评估高轨SAR信号作为加性脉冲射频干扰时,对GNSS接收机性能产生的影响。以具有代表性的B3I信号为例,评估在设定参数条件下,高轨SAR信号对不同类型的B3I接收机性能的影响。结果表明,在当前设定的高轨SAR信号干扰存在情况下,接收机性能略有下降,但仍然能够正常工作。Because the designed frequency band of Geosynchronous synthetic aperture radar(GEO SAR) satellite signal possibly shares or overlaps with the frequency band of various Global Navigation Satellite System(GNSS) signals which have been put into use, the ground GNSS receiver may be subject to the pulse radio frequency interference generated by GEO SAR signal.In order to evaluate the influence of GEO SAR signal on the performance of GNSS ground receiver, a parametric theoretical model based on International Telecommunication Union(ITU) related standards is proposed in this paper.The model uses the "source-path-receiver" analysis method to extract parameters from the three aspects of GEO SAR signal, signal propagation path and receiver model for interference evalua-tion.Then, according to ITU standards, the influence of high-orbit SAR signal as additive pulse radio frequency interference on the performance of GNSS receiver is evaluated.Taking the representative B3 I signal as an example, this paper evaluates the perfor-mance of different types of B3 I receivers for GEO SAR signal under the condition of the assumed design parameters.The results show that the performance of the receiver decreases slightly in the presence of high-orbit SAR signal interference, but it can still work normally.

关 键 词：卫星导航 GNSS接收机 射频脉冲干扰 

分 类 号：TN965.5[电子电信—信号与信息处理]