基于OFDM技术的水声语音通信系统设计与实现  

Design and implementation of underwater acoustic voice communication system based on OFDM technique

作　　者：陈冰[1] 尹禄[1,2] 赵安邦 吴君君 

机构地区：[1]海军工程大学电子工程学院,武汉430033 [2]哈尔滨工程大学水声技术重点实验室,哈尔滨150001

出　　处：《海军工程大学学报》2012年第6期70-74,共5页Journal of Naval University of Engineering

基　　金：国家自然科学基金资助项目(41006058);海军工程大学自然科学基金资助项目(201200000071)

摘　　要：为了克服水声信道具有的有效通信带宽及其时变、空变等特性,采用了能够有效抗频率选择性衰减、抗多径干扰以及具有很高频谱利用率的正交频分复用技术;使用AMBE-2000芯片对语音编码进行压缩,设计了适用于水声信道环境下的实时语音通信系统,并对系统的主要硬件电路和软件设计进行了分析;对语音信号作了插入舒适噪声、回波消除、音量控制等处理;最后,进行了系统联调和水池试验,结果显示:该语音通信系统通话清晰,证明了该系统的有效性和实用性。Sound wave is an effective information carrier in underwater wireless communication. Underwater acoustic communication plays an important role in national defense construction and oceanographic development. In order to deal with the limited bandwidth and the time-varying and spacevariant characteristics of the underwater acoustic channel, the orthogonal frequency division multiplexing （OFDM） technique with high frequency spectrum is widely applied, which can overcome frequency selective fading and multi-path interference. The real-time voice communication system that is suited for the underwater acoustic channel was designed using AMBE-2000 to compress the voice coding. The main hardware circuit and software design of voice communication system were analyzed and the voice signal was treated with comfortable noise, echo elimination, and volume control, which finally went through the system debugging and channel pool test. The result proves that the underwater acoustic voice communication system is effective and feasible with clear voice.

关 键 词：水声通信 正交频分复用 AMBE-2000 语音通信 

分 类 号：TN91[电子电信—通信与信息系统]