一种基于DOA分布信息熵加权的线谱目标检测方法

A linear spectrum target detection method based on DOA distribution information entropy weighting

针对常规宽带能量检测方法对低信噪比线谱目标检测性能较差的不足,文章在分析目标线谱波达方向(Direction of Arrival,DOA)估计分布信息熵的基础上,提出一种基于DOA分布信息熵加权的线谱目标检测方法。通过仿真对比分析了该方法的检测性能,并利用海上实验数据验证了其有效性。结果表明,当目标方位较为稳定时,该方法可有效检测低信噪比线谱目标,并可适用存在多个同频线谱目标的情况。

In view of the poor performance of conventional wideband energy detection methods for detecting low signal to noise ratio(SNR)line spectrum targets,a linear spectrum target detection method based on target DOA distribution information entropy weighting is proposed in this paper.The detection performance of this method is analyzed through simulation and its effectiveness is verified by the offshore experimental data.The results show that,when the target orientation is relatively stable,this method can effectively detect line spectrum targets with low SNR,and can be applied in the case of multiple line spectrum targets at the same frequency.