一种基于广义Duffing振子的水中弱目标检测方法
发布时间：2019-06-17 12:57
【摘要】：海洋环境中,在水下目标的线谱频率未知或者目标辐射噪声的连续谱很弱时,很难实现水中弱目标的准确检测,本文提出基于广义Duffing振子检测系统的水下目标辐射噪声检测方法.通过对传统周期扰动的Duffing振子信号检测系统的分析和推广,提出了一种可输入非周期、非平稳信号的广义Duffing振子检测系统,可检测输入的无先验信息目标信号.为实现广义Duffing振子系统运动状态的精确、有效判断,提出了一种相空间图形的离散分布列计算方法,通过类网格函数实现了利用统计复杂度对系统输出的嵌入式表征,从而实现了无先验信息时的水中弱目标的嵌入式检测.相同条件下与传统检测方法仿真对比可知,本文提出的方法可以检测到更低信噪比下的目标,并能满足水中检测实时性要求.
[Abstract]:In marine environment, when the line spectrum frequency of underwater target is unknown or the continuous spectrum of target radiation noise is very weak, it is difficult to realize the accurate detection of weak target in water. In this paper, a method of underwater target radiation noise detection based on generalized Duffing oscillator detection system is proposed. Based on the analysis and generalization of the traditional Duffing oscillator signal detection system with periodic disturbance, a generalized Duffing oscillator detection system with input aperiodic and non-stationary signals is proposed, which can detect the target signal without prior information. In order to realize the accurate and effective judgment of the motion state of the generalized Duffing oscillator system, a discrete distributed column calculation method of phase space graph is proposed. The embedded representation of the system output by using the statistical complexity is realized by using the grid-like function, thus the embedded detection of the weak target in the water without prior information is realized. Compared with the traditional detection method under the same conditions, the proposed method can detect the target at lower signal-to-noise ratio (SNR), and can meet the real-time requirements of water detection.
【作者单位】： 海洋声学信息感知工业和信息化部重点实验室(西北工业大学);西北工业大学航海学院;
【基金】：国家自然科学基金(批准号:61571365)资助的课题~~
【分类号】：P714
，
本文编号：2501005
[Abstract]:In marine environment, when the line spectrum frequency of underwater target is unknown or the continuous spectrum of target radiation noise is very weak, it is difficult to realize the accurate detection of weak target in water. In this paper, a method of underwater target radiation noise detection based on generalized Duffing oscillator detection system is proposed. Based on the analysis and generalization of the traditional Duffing oscillator signal detection system with periodic disturbance, a generalized Duffing oscillator detection system with input aperiodic and non-stationary signals is proposed, which can detect the target signal without prior information. In order to realize the accurate and effective judgment of the motion state of the generalized Duffing oscillator system, a discrete distributed column calculation method of phase space graph is proposed. The embedded representation of the system output by using the statistical complexity is realized by using the grid-like function, thus the embedded detection of the weak target in the water without prior information is realized. Compared with the traditional detection method under the same conditions, the proposed method can detect the target at lower signal-to-noise ratio (SNR), and can meet the real-time requirements of water detection.
【作者单位】： 海洋声学信息感知工业和信息化部重点实验室(西北工业大学);西北工业大学航海学院;
【基金】：国家自然科学基金(批准号:61571365)资助的课题~~
【分类号】：P714
，
本文编号：2501005
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