浅海目标参数估计是水声领域亟待解决的重要问题。本文提出一种利用单频声强干涉特征估计目标运动参数的方法。目标与水听器的相对位置随时间发生改变，利用运动目标单频声强随时间的起伏做傅里叶变换获得谱峰。谱峰值与目标在时间区间内的径向速度相关。随着目标运动，不同的时间区间对应的径向速度发生变化，可以绘制径向速度随时间变化伪彩图。通过目标参数搜索值可以获得径向速度时间变化曲线，利用曲线与伪彩图中谱峰值进行拟合，实现目标参数的估计。仿真结果表明，所提方法通过参数搜索拟合出与伪彩图中的条纹趋势一致曲线，此时对应参数即为目标参数估计值。从结果看出，估计值与实际值基本保持一致。
Shallow sea target parameter estimation is that the area of water is urgently needed to solve important problems. This paper proposes a method of estimating the target motion parameters using a single-band sound intensity interference feature. The relative position of the target and the hydrophone changes over time, using the moving target single-frequency sound to the spectral peak. The peak value is related to the radial speed of the target in the time interval. As the target movement, the radial speed corresponding to different time intervals changes, and the radial speed can be drawn with time to change the pseudo chart. The radial speed time variation curve can be obtained by the target parameter search value, and the spectrum of the pseudo-color map is fitted to the pseudo-color map, and the estimate of the target parameter is achieved. The simulation results show that the method is given through parameter search to fit the consistent curve with the striped trend in the pseudo chart. At this point, the corresponding parameters are estimated values. As a result, the estimated value is basically consistent with the actual value.
2023,45(1): 167-170 收稿日期：2021-12-02
DOI：10.3404/j.issn.1672-7649.2023.01.030
分类号：U666
基金项目：空军工程大学基础部科研启动基金(JK2020110)
作者简介：李丹阳(1991-),女,硕士,讲师,研究方向为信号处理
