| 邱伟成,张欣苗.基于卡亨南-洛维展开的修正 OBF 磁目标检测方法[J].电子测量与仪器学报,2023,37(9):119-125 |
| 基于卡亨南-洛维展开的修正 OBF 磁目标检测方法 |
| Modified OBF method based on Karhuen-Loeve expansion for magnetic target detection |
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| DOI： |
| 中文关键词: 磁干扰补偿 磁异目标探测 OBF 算法 目标检测 |
| 英文关键词:magnetic interference compensation magnetic target detection OBF algorithm object detection |
| 基金项目:国家自然科学基金(62201599)项目资助 |
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| 中文摘要: |
| 针对磁异信号的检测通常会受到地磁噪声干扰的问题,在磁干扰补偿研究的基础上,提出一种基于卡亨南-洛维展开的
修正 OBF 磁目标检测方法。 首先构建磁干扰的椭球拟合模型,通过求解拟合模型的系数实现对干扰的总体补偿,补偿精度约
30 nT;再利用卡亨南-洛维展开对 OBF 检测算法进行修正,提升有色背景噪声下的信号检测能力;最后开展无人机探测磁目标
的实验研究,实验结果表明,修正的 OBF 检测算法具有更佳的检测效果,尤其是针对低信噪比目标的检测优势明显,信噪比增
益提升约 2 dB。 |
| 英文摘要: |
| Aiming at the problem that the detection of the magnetic anomaly signal is usually interfered by the geomagnetic noise, a
modified OBF magnetic target detection method based on the Karhuen-Loeve expansion is proposed, after the research of the magnetic
interference compensation. Firstly, the ellipsoid fitting model of the magnetic interference is built, and the compensation of the
interference is realized by solving the coefficients of the fitting model. The compensation ability is about 30 nT. Then, the OBF detection
algorithm is modified by the Karhuen-Loeve expansion to improve the detectivity under the colored background noise. Finally, the
experimental research on the detection of magnetic targets by an unmanned aerial vehicle is carried out. The experimental results show
that the modified OBF detection algorithm presents better detectivity, especially for the detection of low SNR targets, and the SNR gain
is improved by about 2 dB. |
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