摘要
研究了一种用多个不同频率的CW窄脉冲与帧同步脉冲的时延差携带信息的水声通信技术。该技术利用多个不同频率的CW矩形窄脉冲与帧同步CW矩形窄脉冲之间的时延值进行信息编码,在接收端采用时延估计和频率检测技术进行解码,从而使码元间距成为可携带信息的有用资源,将码元间距扩展到足够宽,既可有效地克服水声信号的多途影响、提高频带利用率,又可大大减少码元脉冲数量,达到节省能量并提高通信可靠性的目的。仿真结果表明,该水声通信编码体制数据传输速率适中,编码和解码简易,系统稳健。
Abstract： An underwater acoustic communication scheme is described. It uses time delay among CW narrow pulses filled with different frequencies and frame synchronous CW narrow pulse to carry information. The receiver uses time delay estimation and frequency detection for decoding.The element intervals are used to overcome the multi-path effect, improve frequency band efficiency, and reduce the number of pulses so as to save energy and increase system reliability. Lake trial results show that the rate of data transmission is moderate, coding and decoding are easy to implement, and the system is robust.
出处
《声学技术》
CSCD
北大核心
2007年第1期130-133,共4页
Technical Acoustics
关键词
水声通信
节能声通信
跳频时延编码(FH—TDFSK)
抗多途传输
underwater acoustic communication
energy conservation acoustic communication
frequency hopping and time delay frequency shift keying （FH-TDFSK）
multi-path
