一种高精度的扩频同步方法

A Synchronization Technique in the Direct Spread System with High Precision

针对直接序列扩频(DS)系统,提出相关峰判决反馈叠加同步法,在传统滑动相关同步法的基础上,将滑动相关器得到的相关序列根据粗同步后码元判决结果叠加处理,可以将精同步点处信噪比提高很多,从而能够准确找到精同步点的位置。

A technique of correlation sequence superposition feedback synchronization is proposed for the direct spread system. This technique is based on the classical gliding correlation synchronization techniques. After coarse synchronization, the symbol is sentenced, then some serial correlation sequences are superposed with respect to the correlating symbol. By this method, the Signal-to-Noise ratio at the exact synchronization point can be raised to a great degree, so that an exact synchronization can be accomplished.