【作者】 刘胜兴； 肖沈阳；

【Author】 LIU Sheng-xing;XIAO Shen-yang;Department of Applied Ocean Physics and Engineering,Xiamen University;Key Laboratory of Underwater Acoustic Communication and Marine Information Technology,Ministry of Education,Xiamen University;

【机构】 厦门大学应用海洋物理与工程系； 厦门大学水声通信与海洋信息技术教育部重点实验室；

【摘要】 将水声OFDM调制技术和多带激励数字语音压缩编码技术相结合进行研究,设计并实现了一种基于DSP的实时水声数字语音通信系统。实验表明该系统在水声信道中具有良好的抗多径干扰性能。当信噪比大于12dB时,系统误比特率在不同通信距离上都小于10^-3,合成的语音有很高的可懂度,能准确分辨出不同的说话人。更多还原

【Abstract】 A real-time DSP-based underwater acoustic digital voice communication system was investigated and implemented by combination of underwater acoustic OFDM modulation technique and multi-band excitation digital voice compression coding technique.Experiments show that the system has excellent anti-multipath performance over underwater acoustic channels.Bit error rate of the system is less than 10^-3 as the signal to noise ratio is greater than 12dB in different communication distance.Synthetic voice has excellent intelligibility,which can identify exactly different speakers.更多还原