GNSS信号功率增强对调零抗干扰接收机的性能影响  

Effect of signal power enhancement on the performance of GNSS null-steering anti-jamming receiver

作　　者：陈飞强 孙一凡 唐小妹[1] 欧钢[1] CHEN Feiqiang;SUN Yifan;TANG Xiaomei;OU Gang(College of Electronic Science and Technology,National University of Defense Technology,Changsha 410073,China)

机构地区：[1]国防科技大学电子科学学院,湖南长沙410073

出　　处：《国防科技大学学报》2023年第5期72-77,共6页Journal of National University of Defense Technology

基　　金：国家自然科学基金资助项目(62003354)。

摘　　要：由于卫星端信号发射功率小、信号传播损耗大,到达接收机的卫星导航信号极其微弱,容易被干扰。为有效应对电磁干扰的威胁,在系统层面和用户层面同时采取抗干扰措施将是一种很好的选择。建立调零抗干扰接收机抗干扰能力分析模型,并定量分析信号功率增强对调零抗干扰接收机抗干扰性能的提升效果。结果表明:信号功率每增强10 dB,接收机抗干扰能力可提升3~4 dB,但从提高接收机非极限条件下的接收性能(载噪比、测距定位精度等)的角度,信号功率增强15~20 dB时,接收性能最优。研究成果可为卫星功率增强量的优化设计以及终端抗干扰设计提供参考。Due to the low transmitting power and large transmission loss,the satellite signal reaching the GNSS receiver is extremely weak,and easy to be interfered.In order to deal with the threat of electromagnetic interference,taking measures at both the system and user level would be a good choice.A model for analyzing the interference suppression capability of anti-jamming receiver with null-steering antenna was established,and the improvement effect of signal power enhancement on the interference suppression performance was quantitatively analyzed.Results show that,the interference mitigation capability of the receiver can be improved by 3~4 dB per 10 dB signal power enhancement.However,from the perspective of improving the receiver′s reception performance(carrier to noise ratio,ranging and positioning accuracy,etc.)under non limiting conditions,when the signal power is increased by 15~20 dB,the reception performance is optimal.The research result can guide the optimization of the signal power enhancement and anti-jamming design of receivers.

关 键 词：卫星导航 信号功率增强 天线阵 抗干扰 调零天线 抗干扰接收机 

分 类 号：TN961[电子电信—信号与信息处理]