针对正交频分复用水声通信中,为实时同步和多普勒补偿而频繁加入辅助数据使通信速率降低的问题,通过设置导频的相位和幅度,把导频转变为首尾相位连续的线性调频信号,该方法使同步与导频复用,同时可以进行多普勒估计,从而节省了额外加入线性调频信号所占用的时间.湖上试验结果表明:系统通信速率为0.25 bit/(s.Hz),未经纠错编码的最低误码率为2.68%,验证了该方法的可行性和有效性. For Orthogonal Frequency Division Multiplexing (FH) underwater acoustic communication, the auxiliary data is frequently added for real-time synchronization and Doppler compensation to reduce the communication rate. By setting the phase and amplitude of the pilot, the pilot is transformed into a continuous phase This method makes the synchronization and pilot multiplexing, and can perform Doppler estimation at the same time, so as to save the extra time of adding chirp signal.The experimental results show that the system communication speed is 0.25 bit / (s). Hz). The minimum error rate without error correction coding is 2.68%, which verifies the feasibility and effectiveness of this method.