高速自适应水声语音系统的设计与实现

Design and Implementation of an Adaptive High Speed UWA Voice Communication System

根据水声通信的复杂信道特性,设计了基于数字信号处理(DSP)的高速数字自适应多载波水声语音通信系统,采用MFSK调制技术、数据精确同步技术以及低噪PGA技术,有效地降低了误码率.通过对其关键技术的性能仿真和分析,以及在2 km长、1.5 m深的恶劣环境中实测,该系统表现出很好的实时性和良好的语音恢复性能,传输距离大于2 km,误码率小于10-3.

Presents a high speed adaptive multi- system based on digital signal processing （DS carrier underwater acoustic（UWA） communication P） real-time processing. Multi-channel freguency shift keying（MFSK） modulation, exact data synchronization and low-noise programmable gain amplifier（PGA） are used to decrease the error rate. With experiments on a condition of 1.5 m depth, and 2 km length, the system showed that the technique is effective in matching the real- time and voice recovery request, the transmission distance reached at least 2 km, and bit-error rate（BER） below 10^-3.