跳扩结合通信系统接收同步算法设计

Design of receiving synchronization algorithm of FH-SS combined communication system

介绍了一种适于FH/DS混合扩频体制接收同步算法。首先利用参考时钟和TOD信息完成跳频初始同步;其次利用频域匹配滤波法和PMF-FFT频率估计法进行伪码相位捕获,并采用开环跟踪结构进行伪码相位跟踪;最后根据伪码相位与跳频图案切换时间间的固有关系,利用伪码相位同步结果辅助完成跳频图案的精确同步。

A receiving synchronization algorithm is introduced for the FH/DS hybrid spread spectrum system.Firstly,the reference clock and the TOD information are used to complete the initial synchronization of frequency hopping.Secondly,the frequency-domain matched filtering method and the PMF-FFT frequency estimation method are adopted to capture the pseudo-code phase,and the open-loop tracking structure is used for pseudo-code phase tracking.Finally,according to the inherent relationship between the pseudo-code phase and the switching time of the frequency hopping pattern,the pseudo-code phase synchronization results are used to assist in completing the precise synchronization of the frequency hopping pattern.