微波脉冲对导航接收机跟踪环路载噪比的影响  

Effect of microwave pulse on the carrier-to-noise ratio of navigation receiver tracking loops

作　　者：赵敏 周星 陈亚洲 ZHAO Min;ZHOU Xing;CHEN Yazhou(Shijiazhuang Campus,Army Engineering University,Shijiazhuang 050003,China)

机构地区：[1]陆军工程大学石家庄校区,河北石家庄050003

出　　处：《国防科技大学学报》2023年第4期196-204,共9页Journal of National University of Defense Technology

基　　金：国家部委基金资助项目(JCKYS2019DC1)。

摘　　要：为了明确微波脉冲对导航接收机的最佳干扰参数,通过对微波脉冲干扰下导航接收机跟踪环路相关处理的理论分析,根据微波脉冲谱线、扩频码谱线以及相干积分时间三者之间的关系,提出一种微波脉冲干扰分类方法,推导了不同参数微波脉冲干扰下相关输出功率和载噪比,并进行了试验验证。理论分析与试验结果表明,当微波脉冲宽度大于等于扩频码周期且小于相干积分时间时,进入相干积分器带宽内的多条微波脉冲谱线干扰某一条扩频码谱线,该微波脉冲参数对导航接收机的干扰效果最佳,且优于连续波干扰;随着干扰谱线数量增多,跟踪环路相关输出功率值增加,载噪比减小,干扰效果增强。To clarify the optimal interference parameters of microwave pulses to navigation receivers,by analyzing theoretically the tracking loop correlation processing of navigation receiver under microwave pulse interference,a interference classification method was proposed on the basis of the relationship between microwave pulse spectral lines,spread spectrum code spectral lines and coherent integration time,the correlation output power and carrier-to-noise ratio under microwave pulse interference with different parameters was further derived,finally experimental verification was carried out.Theoretical analysis and experimental results show that when the microwave pulse width is greater than or equal to the spreading code period and less than the coherent integration time,a spreading code spectral line is interfered with multiple microwave pulse spectral lines which enters the bandwidth of the coherent integrator,the microwave pulse has the best interference effect on navigation receivers,and is better than continuous wave interference;with the increase of the number of interference spectral lines,the correlation output power is increased,the carrier-to-noise ratio is decreased,and the interference effect is enhanced.

关 键 词：导航接收机 微波脉冲 跟踪环路 相关输出功率 载噪比 

分 类 号：TN965[电子电信—信号与信息处理] TN972[电子电信—信息与通信工程] TN787