卫星通信中开环载波同步算法的仿真与分析

On the Research of Open-loop Carrier Synchronization in the Satellite Communication

该文针对突发通信载波同步,首先建立了数据辅助频偏估计模型和非数据辅助频偏估计模型,比较分析了频域和时域载波频偏估计模型的特点。根据理论推导,对几种典型的频域和时域开环载波同步算法进行了比较总结,指出了算法的本质和特点。最后,通过计算机仿真给出了不同算法的性能曲线,比较分析了Rife算法、Fitz算法、L&R算法和M&M算法的优点和不足,得到了算法的适用范围和条件,为实际工程应用中选取相对最佳的频偏估计算法提供了重要的参考。

Considering the carrier synchronization in the burst communication,the paper builds up the da ta-aided frequency estimation model and the none-data-aided frequency estimation model.Then we make a comparison of the frequency-domain carrier estimation models and the time-domain carrier esti mation models.According to the theory proving,we conclude the differences of some typical algorithms and point out the nature of the algorithms. In the end, by the performance figures given by computer simulation, we analysis the four algorithms and get the conditions of application.The results provide an important ref erence for choosing the relatively optimal frequency estimation algorithm in the practical application.