一种高精度水下目标回波模拟技术的研究

为了模拟水下运动目标的声呐回波，研究丁一种高精度、多功能的水下目标回波模拟技术。系统采用工控机对信号处理硬件进行控制，工作方式为回波转发及回波触发，同时具有自检功能，可对水下目标回波的目标强度、多普勒效应和脉冲展宽等参数进行精确模拟，并且能够实时完成对输入、输出脉冲信号参数的精确测量和记录。该系统经过水池调试、水库试验及海上试验，证实其波形参数精度高、动态范围大、抗干扰能力强、对弱信号具有很好的检测能力以及较高的测量精度。

A High Precision Technique for Simulating Underwater Target Echo

To simulate the sonar echo of the underwater moving target,a high precision and multi-function underwater target simulation technique is proposed.The signal processing hardware is operated under the control of an industrial computer.The simulator has two modes of operating: the echo repeat mode and the transpond mode.It also has the function of self-testing.The simulator can add target strength,Doppler and pulse broadening to the simulated echo signal with high precision.The parameters of both input and output signals can be measured and recorded by the system also.The results from tests at tank,reservoir and sea demonstrated that the simulator has characteristics as follws: accurate parameter simulation and measurement,large-scale dynamic input,ability of weak signal detection and anti-jamming.