无人水下航行器声通信系统设计与应用

Design and Application of Acoustic Communication System for Unmanned Undersea Vehicle

声波是迄今为止人类发现的唯一能在水下远距离传播信息的载体,为了对无人水下航行器(UUV)进行遥控和监测,建立一条UUV和水面指挥平台之间的无线通信链路,文中设计了一套UUV通信系统,该系统采用声波作为载体实现远距离无线通信。由于水声信道具有明显的多径干扰、多普勒频偏等特性,该系统采用非相干多载波频移键控(MFSK)技术保证声通信链路的稳定性。为了进一步加强遥控指令、状态信息等的可靠传输,采用停止等待自动要求重发(ARQ)协议对通信过程进行差错控制。所有控制算法均在低功耗数字信号处理器(DSP)硬件平台下实时实现。通过南海试验测试,验证了该系统的实用性和稳定性。

To remotely control and monitor an unmanned undersea vehicle(UUV),it is necessary to establish a communication link between the UUV and the surface control platform.In this study,a telecommunication system adopting acoustic wave as the carrier is designed for the UUV.Because the underwater acoustic channel has the significant characteristics of multipath interference and Doppler shift,this system uses incoherent multi-carrier frequency shift keying(MFSK)technology to ensure the stability of acoustic communication link.In order to further strengthen the transmission reliability of telecontrol instruction and status information,the stop-and-wait automatic repeat request(ARQ)protocol is used for error control.All of the control algorithms are timely realized on the low-power digital signal processor(DSP)hardware platform.Tests in South China Sea verify the practicability and stability of the present system.