基于扩散滤波后正交分解的水下电场信号检测算法

Detection Algorithm of Underwater Electric Field Signal Based on Diffusion Filtering and Orthogonal Function Decomposition

针对水下目标微弱电场提取的问题,提出了一种基于扩散滤波后正交分解的算法。首先对信号进行扩散滤波预处理,提升一定信噪比,再运用正交基分解得到能量信号E进一步提升信噪比,最终利用门限判决实现电场信号的检测。经实验结果验证,本算法可以有效检测出淹没在噪声中的水下电场弱信号。

Aiming at the problem of weak electric field extraction of underwater targets,an algorithm based on OBF decompo⁃sition and diffusion filtering is proposed.Firstly,the signal is preprocessed by diffusion filtering,it can be improved a certain SNR,and then the energy signal is obtained by orthogonal decomposition to further improve the SNR.Finally,the threshold decision is used to realize the detection.It is verified by experimental results,this algorithm can effectively detect the weak signal of underwater electric field submerged in noise.