被动声纳目标/背景建模与仿真

该文通过对舰船辐射噪声水声特性的分析，建立了舰船低频辐射噪声连续谱和线谱的数学模型，让迭加有线谱信号的白噪声通过一个有限冲激响应（FIR）数字滤波器，即可得到期望的目标舰船辐射噪声信号。该模型和海洋传播损失模型以及海洋环境噪声模型一起用于仿真被动声纳系统的接收信号。通过对仿真输出信号的处理和分析，给出了声场谱图，结果表明该方法能很好地再现被动声纳目标舰船辐射噪声的典型声学特征。该方法也可用于半实物仿真、系统测试以及水中兵器仿真等。

Object-Background Modeling and Simlation for Passive Sonar

This paper analyzes the acoustic characteristic of ship radiated noise, the continuous spectrum models and the line spectrum models of ship radiated noise are given. Let the white noise added signals which have line spectrum pass through a FIR digital filter, the expected signal of ship radiated noise can be obtained from the outputs of filter. And the models which can be used to simulate the target signal received by the passive sonar with the models of ambient noise and the models of transmission loss on the sea. By processing the output of the simulation, acoustic spectrogram are given, the results show that the methods can reconstitute typical acoustic character of ship radiated noise. The methods can also be applied to the hardware in the loop simulation and the test and simulation of underwater ordnance.