基于Kalman滤波的载波跟踪环路设计

摘要

To solve the difficult of carrier tracking under the circumstances of high dynamic and weak signals, a new structure of high dynamic tracking loop is proposed based on Kalman filtering. In this paper, details of the loop are presented and the functions of all the blocks in the loop as well as pa-rameter transmission among the blocks are discussed. Finally, compared with the FLL assisted PLL track-ing loop, the simulation results indicate that the designed loop greatly improve the capability of tracking under the circumstances of high dynamic.%基于Kalman滤波方法提出了一种新的高动态载波跟踪环路的设计方案，用以解决高动态、弱信号条件下对载波跟踪造成的困难。文中给出了整个环路的设计方案，并详细讨论了环路中各个模块的参数传递过程。最后同FLL辅助PLL的跟踪环路进行了对比，仿真结果显示该环路在高动态状态下能够极大的改善跟踪性能。