水声探测系统目标回波信号仿真技术研究

Simulation Research on Target Echo in Underwater Acoustic Detection System

目标回波信号是水声探测系统主要的信息来源,在水声对抗仿真系统中,目标回波信号的仿真数据量又是制约仿真实时性的关键因素之一,因此,必须对目标回波信号进行深入研究,既要真实仿真出实际系统中目标回波信号的所有特征,又要满足仿真实时性的要求。提出了一种针对水声对抗仿真系统的目标回波仿真信号模型,该模型以窄带信号的复包络为基础,综合了实际系统中多普勒频移和频率补偿的影响,更具真实性和实用性。利用该模型具有采样频率低,仿真数据量小的优点,能够满足仿真系统实时性的要求。在水声对抗试验仿真系统中得到了很好的检验,具有广阔的应用前景。

Target echo signal is the main information source in underwater acoustic detection system. The quantity of simulation data is the pivotal factor which restricts the real-time of the simulation system. It is very important to find out a model which has all the character of the target echo, and can meet the request of real-time character. A target echo signal model is provided. The model based on the complex envelope of partial band signal, which contains the influence of dopier and frequency equalize in the real system. The model can satisfy the real-time request of simulation system. It is verified in the underwater acoustic countermeasure simulation system and has a wider applications future.