【摘要】 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.更多还原

【Abstract】 Presents a high speed adaptive multi-carrier underwater acoustic(UWA) communication system based on digital signal processing(DSP) 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 1.5m depth,and 2km length,the system showed that the technique is effective in matching the real-time and voice recovery request,the transmission distance reached at least 2km,and bit-error rate(BER) below 10-3.更多还原