采用时间反转的调频水声语音通信方法  

Frequency Modulation Underwater Acoustic Voice Communication Technology with Time Reversal

作　　者：吴燕艺 李剑汶 童峰[1] 

机构地区：[1]厦门大学海洋与地球学院,水声通信与海洋信息技术教育部重点实验室,福建厦门361102

出　　处：《厦门大学学报（自然科学版）》2016年第4期570-574,共5页Journal of Xiamen University：Natural Science

基　　金：国家自然科学基金(11274259,11574258);福建省中青年教师教育科研项目(JA14008)

摘　　要：调频语音通信技术具有抗干扰性能好、易于实现的特点,但在水声信道多径条件下调频体制传输的水声语音质量受到严重影响.针对此问题在调频语音通信体制下引入时间反转处理,通过抑制多径效应聚焦能量提高信号信噪比,改善调频水声语音通信性能,并采用客观语音质量评估(perceptual evaluation of speech quality,PESQ)方法对调频水声语音通信质量进行评估.海洋试验证明,时间反转处理可有效提高调频水声语音通信系统性能.As the underwater acoustic channel is a hostile channel with serious time varying,multipath effect,high-noise among others,research and design of the high performance underwater acoustic voice communication is highly challenging.Frequency mod-ulation （FM）technology bears strong anti-jamming ability,which is convenient to be implemented.However,the communication performance of FM is seriously affected under the underwater channel with multipath,high-background noise among others.For the purpose of improving the underwater voice communication performance under multipath conditions,this paper introduces the time-reversal mirror technology to the design of underwater FM voice communication system,which can concentrate multipath and im-prove signal-to-noise ratio （SNR）.Finally,this paper adopts the PESQ to evaluate the FM underwater speech quality.Via the sea trial experiment,time-reversal mirror technology can improve the communication performance of the proposed system.

关 键 词：水声语音通信 调频 时间反转 多径信道 

分 类 号：TN912.3[电子电信—通信与信息系统]