全数字光PPM接收机的最佳帧节同步

Frame and Block Synchronization for All DigitalReceiver of Optical PPM Communication

光ＰＰＭ通信有良好的应用前景，同步是它实现的核心问题．本文推导了全数字光ＰＰＭ接收机的最大似然帧节同步算法，并给出了两个更容易实现的简化算法．讨论了最佳ＰＰＭ同步序列的设计问题．用计算机模拟了三种算法的工作性能．

The use of optical PPM communication is bright.The synchronization is a crucial problem in PPM.In this paper,maximumlikelihood algorithms are derived for block and frame synchronization in all digital receiver of optical PPM communication and two approximations are identified.Further,the problem of PPM synchcode sequence designing based on aperiodic correlation is studied.The performances of the algorithms are discussed through computer simulations.