基于正交频分复用的水下转发器的设计  

Design of underwater repeater based on orthogonal frequency division multiplexing

作　　者：周锋 高金辉[2] 孙宗鑫 

机构地区：[1]哈尔滨工程大学水声技术国家级重点实验室,哈尔滨150001 [2]河南师范大学物理与信息工程学院,河南新乡453007

出　　处：《声学技术》2010年第3期264-267,共4页Technical Acoustics

基　　金：国家863项目(2006AA09Z105);国家自然科学基金项目(10704020)

摘　　要：为解决长距离高速水声数据传输问题,采用接力式水声数据转发传输是一个很好的解决方案。结合正交频分复用技术的特点设计实现了一个数字式的水下转发器系统。系统功耗低、结构简单,可以很好地解决水声通信中存在的多途干扰和窄带宽问题,实现高速、可靠的水下数据转发的目的。湖试中,在6000m的距离内,3kHz带宽下,转发速率为4.32kb/s,误码率低于10-3。湖试结果表明,基于正交频分复用的水下转发器可以达到较高的转发速率和较低的误码率。In order to solve the problems of long-distance high-speed underwater acoustic data transmission,a good method is to transmit the data by using repeaters.In the paper,an underwater repeater system based on orthogonal frequency division multiplexing is designed.The structure of the repeater is very simple and it has the characteristic of low power.The repeater can overcome the problems due to multi-path propagation and limited bandwidth in underwater acoustic communication to achieve reliable high-speed transmitting communication.According to lake testing,the bit rate reaches 4.32kb/s for the bandwidth of 3kHz within 6000m with the bit error rate（BER） lower than 10-3.The experi-ments show that the repeater can reach high data rate with low BER.

关 键 词：正交频分复用 水下转发器 水声通信 

分 类 号：TB565[交通运输工程—水声工程]