Galileo L1F信号载波跟踪环中鉴别器组合研究

为了更好地进行载波相位跟踪，Galileo L1F信号相比于GPS信号增加了没有导航数据的导频信道，使数据信道能够使用不受导航数据限制的鉴别器。但是Galileo L1F信号载波相位跟踪环中传统的鉴别器组合方式仍有不足。基于适用于单一导频信道的鉴别器性能优于适用于单一数据信道的鉴别器的原理，提出了新的鉴别器组合方式，并通过仿真实验对比在不同热噪声环境下传统组合方式的两种鉴别器组合和新组合方式的两种鉴别器组合的性能。研究结果表明新的鉴别器组合在Galileo L1F接收信号的抑制噪声和防止失锁控制方面比传统鉴别器组合有明显优势。

The Research on the Combination of Discriminators in Galileo L1F Signal Carrier Tracking Loop

In order to perform carrier phase tracking better,compared with the GPS signal,Galileo L1F signal increases navigation data without pilot channel.Then the data channel can use the discriminator unlimited in navigation data.The traditional combination of discriminators in Galileo L1F signal carrier phase tracking loop can still be improved.In this paper,a new combination of discriminators is proposed,because the discriminator for pilot channel-only has better performances than the discriminator for data channel-only.Through the simulation experiment under different thermal noise environments,the performances of both new and traditional combinations of discriminators are tested at the objective of improving the carrier phase tracking accuracy.The results show that the new combination of discriminators has great advantage over traditional combination of discriminators in restraining signal noise and preventing loss of lock.