基于复相关相位斜率的海面弱小目标检测方法  

Weak Target Detection in Sea Clutter Background Based on Phase-Slope of Complex Correlation

作　　者：程孝龙[1] 姬光荣[1] CHENG Xiao-Long;JI Guang-Rong(College of Information Science and Engineering, Ocean University of China, Qingdao 266100, China)

机构地区：[1]中国海洋大学信息科学与工程学院,山东青岛266100

出　　处：《中国海洋大学学报（自然科学版）》2020年第8期131-136,共6页Periodical of Ocean University of China

基　　金：国家自然科学基金项目(61271406)资助。

摘　　要：针对海杂波严重制约雷达目标探测性能的问题,本文提出了一种基于复相关相位斜率特征的海面弱小目标检测方法。本文通过研究海杂波复数域下的时间自相关特性,发现复相关系数相位信息呈线性分布,由此提出了一种新颖的统计特征:复相关相位斜率。研究表明,复相关相位斜率特征可显著提高雷达数据的信杂比。经过不同极化方式下的海杂波数据验证表明,本文提出的目标检测方法性能优于传统基于分形特征的Hurst指数检测器,使用本文的方法可以有效识别海面弱小目标。Sea clutter is seriously restricting the detection performance of radar system and a novel weak detection method based on phase-slope of complex correlation is presented in this paper.By analyzing the temporal correlation properties of sea clutter in complex domain,we found that the phase of the complex correlation coefficient was linearly distributed,thus a new statistical parameter,called phase-slope of complex correlation,was proposed in this paper.The study showed that the phase-slope of complex correlation tould significantly improve the signal-to-noise ratio for radar signal.The measured X-band radar data in different polarization modes were used to verify the validity of the detection method and the experimental results indicated that the performance of our target detection method was superior to the traditional Hurst index detector,which could effectively identify the weak target in sea clutter background.

关 键 词：海杂波 复相关 目标检测 相位斜率 海面弱小目标 

分 类 号：TN957.51[电子电信—信号与信息处理]