连续波干扰下L1C信号码跟踪性能研究

Code Tracking Performance of L1C Signal Under Continuous Wave Interference

针对连续波干扰下传统导航信号的码跟踪性能评估方法不适用于新信号体制下的L1C信号,从其信号体制的角度利用奇偶相关判据,定性分析其码跟踪性能,提出"干扰误差包络"和"平均误差包络"评估方法定量分析了L1C信号在受到连续波干扰时的码跟踪性能。结果表明:L1C信号的码跟踪性能要优于C/A码信号,不同卫星播发信号中,导频信号的码跟踪性能要比数据信号好1~1.3倍(最大能达到1.4倍),个别数据码信号的码跟踪性能要优于导频码信号。

The code tracking performance assessment method for tradition navigation signal is not applicable for the L1C of new signal system in the presence of continuous wave interference. Therefore, we made a qualitative analysis to the code tracking performance of L1C signal from the perspective of pseudo code by using the odd-even correlation criterion. The assessment methods of ＂Interference Error Envelope＂ and ＂Average Error Envelope ＂ were put forward for making quantitative analysis to the code tracking performance of LI C signal under interference. The result shows that the LI C signal has a better performance than C/A code signal ：The code tracking performance of pilot signal is 1 - 1.3 （ with the maximum of 1.4） times better than that of the data signal, while a very few data code signal make a better code tracking than the pilot code signal.