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中文摘要：
针对高速运动过程中的水声通信，提出一种新型稳健的同步方法。该方法充分利用线性调频（LFM）信号的自相关特性及LFM扩频水声通信解调原理。湖试结果表明该方法简单有效，能够消除同步误差累积。利用湖试数据进行的仿真结果表明：该方法在常速及变速运动情况下均有效；在水下24m／s高速运动、时变多途干扰、带内接收信噪比低于0dB时，数据率可达为100bit／s，误码率保持在10^-4左右。
英文摘要：
A novel synchronization method is proposed to improve the LFM based spread spectrum underwater acoustic communication in large Doppler environment. It uses the autocorrelation characteristic of the linear frequency modulation signal （LFM）. Lake experiment results showed that it＇s being able to eliminate the synchronization error. Our simulated results by using the lake saved communication data show that this novel method is also effective in large Doppler and variant Doppler conditions. The LFM based spread spectrum underwater acoustic communication can reach 100bits/s when the received SNR is below 0dB, the time-varying multipath propagation exists and the relative speed between transmitter and receiver is as large as 24 m/s.
同期刊论文项目
同项目期刊论文
An Adaptive Differentially Coherent Detection and Phase Compensation Algorithm in Underwater Acousti
Real-time Parallel Processing System Design and Implementation for Underwater Acoustic Communication
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