一种基于频数直方图的舰船体积目标识别方法

A Target Recognition Method in Ship Volume Based on Frequency Histogram

随着水声对抗技术的发展,声诱饵通过播放典型舰船的辐射噪声录音来模拟舰船信号,其时域和频域特征与真实舰船已十分逼近,水下声探测系统根据信号的时域和频域特征已较难识别目标.针对这一问题,分析了舰船辐射噪声源的空间特性和声诱饵的点源特性,建立了舰船辐射噪声源的多亮点模型,利用舰船以不同横距通过声探测系统上方时的空间尺度差异,提出了一种基于频数直方图的舰船体积目标识别方法,在不同正横和信噪比下对算法的目标识别能力进行了仿真分析.结果表明,当目标信号较强时,在较远距离上也可以得到较好的识别效果.

With the development of underwater acoustic confrontation technology,acoustic decoy is used to simulate the ship signal by broadcasting radiation noise recording of typical ships.Due to the time and frequency domain characteristics approach the real ship,it is difficult to identify the target for the underwater acoustic detecting system according to the time domain and frequency domain characteristics.In this regard,the spatial characteristics of ship and acoustic decoy are analyzed.Also,the multi-highlight model of ship radiation noise is established.Moreover,by using the space scale difference of target ship through the sound detection system in different abeam distances,a target recognition method based on frequency histogram is proposed,and the target identification ability is simulated under different abeam distance and signal to noise ratio.The results show that also a good recognition effect will be achieved in a long distance when the target signal is stronger.