基于CCSDS协议的临近空间信号跟踪技术性能分析

摘要

As the current universal proximity link protocol,the CCSDS protocol is widely used in data communication of proximity space. firstly,This paper introduces the signal system of this protocol,and then analyzes the performance of the cur-rent 2 tracking algorithms( PLL and EKF) ,finally implements the MATLAB structure. The simulation results indicate. That Extended Kalman filter( EKF) has better tracking precision and wider dynamic adaption range compared with phase lock loop ( PLL) .%CCSDS( Consultative Committee for Space Data System)协议作为目前通用的临近空间链路协议，广泛的应用在临近空间的数据通信中。文章详细介绍了本协议下的信号体制，并针对该信号体制，分析了目前2种跟踪方法(PLL及EKF)的性能，实现了相应的MATLAB结构。仿真结果表明，扩展卡尔曼滤波法(EKF)相较于锁相环( PLL)有更高的跟踪精度和更大的动态适应范围。