CAJ | 학술논문

矢量频率锁定环（VFLL）是一种通过直接估计接收机状态（位置、速度、加速度、钟差和钟漂等）进而实现对各路可见卫星信号载波频移的跟踪方法。不同卫星信号到接收机的频偏由接收机和卫星的相对速度决定，它们满足特定的关系，V FL L通过对各路卫星信号载波频移之间的相关信息的利用，达到稳定跟踪载波频率、降低跟踪门限的目的。本文首先推导了VFLL的理论算法和建立了VFLL的信号模型；然后通过仿真评估了VFLL的性能，并与传统频率跟踪算法仿真结果比较，表明了矢量载波频率跟踪算法在稳定跟踪弱信号和快速重捕失锁信号方面有较大优势。
시량빈솔쇄정배（VFLL）시일충통과직접고계접수궤상태（위치、속도、가속도、종차화종표등）진이실현대각로가견위성신호재파빈이적근종방법。불동위성신호도접수궤적빈편유접수궤화위성적상대속도결정，타문만족특정적관계，V FL L통과대각로위성신호재파빈이지간적상관신식적이용，체도은정근종재파빈솔、강저근종문한적목적。본문수선추도료VFLL적이론산법화건립료VFLL적신호모형；연후통과방진평고료VFLL적성능，병여전통빈솔근종산법방진결과비교，표명료시량재파빈솔근종산법재은정근종약신호화쾌속중포실쇄신호방면유교대우세。
The Vector Frequency Lock Loop (VFLL) is used in GNSS receivers to track the frequency of the carrier received from satellites by estimating directly the receiver ’s navi‐gation states (position ,velocity ,acceleration ,clock bias and so on) .For a given receiver ,the frequency of the received carrier from different satellites vary with the velocities of both the receiver and the satellites ,so they are geometrically correlated .Then the VFLL can reduce the tracking threshold and track the frequency of the carrier received from satellites steadily by extracting the interrelated information from the frequency of the received carrier from dif‐ferent satellites .The VFLL algorithms and the VFLL architecture are presented in detail . The performance of the VFLL is tested using simulation .Compared with the performance of the traditional frequency tracking method ,the VFLL algorithms have great advantages in terms of the stability of the weak signal tracking and rapid re‐tracking performance .