激光水下通信识别判决式帧同步器

A Frame Synchronizer with Recognizer and Discriminatorfor Underwater Laser Communication

在激光水下通信的节头内插入捕获序列，用８９５１，８２５４，ＧＡＬ等芯片构成识别判决式帧同步器．分析了同步器的工作原理、假同步概率、漏同步概率；给出了实验结果．该同步器具有优良的抗噪性能．

A frame synchronizer with recognizer and discriminator is described, which consists mainlyof a type 8951 singlechip computer, a type 8254 programmable counter and a GAL chip. Three groupsof acquisition sequences are inserted into the head of a sector PPM signal, and the sequences are to beidentified by the recognizer and the sector head is to be discriminated by the discriminator. The sectorsynchronization signal and the frame synchronization signal are to be provided by other circuits. Withlow threshold of the recognizer and high threshold of the discriminator, the synchronizer will have afairly good anti-nois ability.