利用线性调频脉冲进行帧同步的方法及性能  

A Novel Method for Linear Frequency Modulation Pulse Synchronization

作　　者：马雯[1] 黄建国[2] 张群飞[2] 

机构地区：[1]上海交通大学电子工程系,上海200030 [2]西北工业大学航海工程学院,陕西西安710072

出　　处：《海洋技术》2006年第3期86-89,共4页Ocean Technology

摘　　要：针对水声信道的特点,提出了一种利用具有大的时宽带宽积的线性调频信号作为帧同步信号的方法。该方法首先在接收端进行滑动时频分析,从而实现线性调频信号的检测及粗同步,再进一步利用拷贝相关处理来实现细同步。计算机仿真和海上试验结果均表明,该方法能够在多途干扰下有效地实现同步。Aimed at the characteristics of underwater acoustic channel, the linear frequency modulation （LFM） pulse synchronization method is proposed, which adopts LFM pulse with large time width and bandwidth product as the synchronization signal. At the receiver end, sliding time-frequency analysis is conducted, and signal detection and coarse synchronization are realized through spectrogram analysis. The accurate synchronization is further achieved by replica correlation. It is shown that this method can realize synchronization efficiently under the multi-path interference by both computer simulation and ocean experiment results.

关 键 词：帧同步 线性调频 时频分析 拷贝相关 

分 类 号：TN911.6[电子电信—通信与信息系统]