中文摘要：

针对水声通信中单一波形设计同步技术存在的适用范围有限的问题，基于伪随机序列、LFM信号以及CW脉冲提出1种非对称同步结构，快速捕捉伪随机序列实现粗同步，有利于技术的硬件实现；利用线性调频信号实现精同步，可为后续处理提供准确的帧同步；最后通过CW脉冲估计得到多普勒系数，为多普勒补偿提供参照。理论研究表明该技术在移动水声通信环境下可给出准确的帧同步以及多普勒因子，并通过仿真试验验证了该技术的有效性与可行性。

英文摘要：

The synchronization technique with single waveform has a narrow application in underwater acoustic com-munication. A new synchronization method in underwater acoustic communication based on PN-LFM and CW im-pulse signals is proposed. Rough synchronization is obtained by PN signal which is useful to conduct on the hard-ware, and then using LFM signal realizes the accurate frame synchronization. The Doppler coefficients are obtained by estimating frequency change of CW impulse signal. The theory analysis and the computer simulation show that the synchronization technique based on asymmetry structure is effective and feasible.