基于FPGA的宽频带水声定位信标信号发射系统设计研究

Design of Broadband Beacon Signal Transmitter of Acoustic Positioning System Based on FPGA

为了克服水声定位系统中信标信号与水声设备工作频段重叠,提高水声定位系统的定位精度与信标信号的检测速度,论文设计完成了一种基于FPGA的宽频带水声定位信标信号发射系统。系统在单片机控制下以FPGA嵌入式系统为运算核心配合D/A电路等模块发射特定水声定位信标信号。将该系统加装于某型水下目标模拟器中与某型水声定位基阵在南海某海域进行海上试验,试验表明该信标信号发射系统功能完整,达到了预先设计目标,信标信号接收基阵能对接收的定位信标进行准确、实时的检测识别,通过试验表明采用该系统后具有较高时延估计精度。

This thesis presents the design and manufacture of the FPGA-based broadband beacon signal transmitter of acoustic positioning system.It can overcome overlap of working frequency band,which radically increases the location accuracy of acoutic positioning system and detection speed of the signal transmitter.This system sends broadband beacon signal transmitter under the control of single chip microcomputer,whose core is FPGA-based embedded system.It will be equipped in a certain type of underwater targetsimulator and a certain type of underwater acoustic array to trial in the waters of the south China.The tests show that the entire system has full functiona,achieves the design goal in advance.The underwater acoustic array can accurately and quickly recognize beacon signal transmitter.The test shows this system time delay can be estimated precisely.