水下运动目标噪声线谱的联合估计方法

Estimation Method for Radiated Noise Line Spectra of Underwater Moving-Target

水下目标辐射噪声特征谱线的联合估计,基于水下运动目标线谱数学模型,通过分析水下目标辐射噪声特征等信息实现。基于经典谱与现代谱估计的联合估计法提取水下目标辐射噪声线谱特征,首先分别估计采集数据的功率谱,得到估算功率谱图;分析功率谱图,确定线谱存在的大致区域,再估计精确线谱。

Based on the math model for radiated noise line spectra of underwater moving-target, the united estimation of radiated noise line spectra was realized by analyzing feature extraction of radiated noise line spectra of underwater moving-target. The feature of radiated noise line spectra of underwater moving-target was extracted by the united spectra estimation method based on the traditional and modern spectra estimation. Firstly, the power SPeCtrum of gathered data was estimated respectively to get the image of power spectrum, and then, the image of power spectrum was analyzed, probable range of existential line spectra was defined, and the precise line spectra was recalculated.