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根据卫星导航系统中用户高动态运动时导致的环路失锁问题,设计了一种用户终端在高动态运动情况下,自适应的可变带宽的锁相环路方案,设计方案可以节约环路稳定时间,并保持稳定的高精度跟踪精度。文章给出了方案的设计思想及相应的理论分析,并且通过仿真分析给出相应的各项仿真结果,仿真结果表明在高动态条件下,所设计的载波恢复方案工作稳定,可以快速、可靠的适应用户终端的高动态变化,并通过与传统设计方案仿真比较,该方案节约了环路的稳定时间,并且大大降低了算法实现的复杂度。
According to the problem of loop lockout caused by high dynamic movement of users in satellite navigation system, an adaptive phase-locked loop with variable bandwidth under high dynamic motion is designed. The design scheme can save the loop Stabilize time, and maintain a stable high-precision tracking accuracy. The article gives the design idea of the scheme and the corresponding theoretical analysis, and gives the corresponding simulation results through the simulation analysis. The simulation results show that under high dynamic conditions, the designed carrier recovery scheme works stably and can be fast and reliable Adapt to the high dynamic changes of the user terminal, and compared with the traditional design scheme simulation, this scheme saves the loop stable time and greatly reduces the complexity of the algorithm.