实测海尖峰特性分析及抑制方法  

Property Analysis and Suppression Method of Real Measured Sea Spikes

作　　者：黄勇[1] 陈小龙[1] 关键[1] 

机构地区：[1]海军航空工程学院电子信息工程系,烟台264001

出　　处：《雷达学报（中英文）》2015年第3期334-342,共9页Journal of Radars

基　　金：国家自然科学基金(61471382;61401495;61201445;61179017);飞行器海上测量与控制实验室开放基金资助课题

摘　　要：在高分辨率、低擦地角、高海况以及HH极化工作方式下,雷达回波强度会明显增强,容易产生海尖峰,使得海杂波具有高幅值、非平稳和非高斯等特点,严重影响雷达对海面微弱动目标的检测。为此,该文提出一种海尖峰抑制方法,首先,给出了海尖峰判别和筛选方法,在此基础上,分析了海尖峰的幅值特性、时间相关性、多普勒谱和分数阶功率谱特性;其次,通过剔除背景中的海尖峰并选取最小平均功率水平的背景杂波作为待检测数据,能够抑制海杂波,改善SCR;最后,实测数据的实验结果验证了该方法的有效性。In case of high-resolution, low grazing angle, high sea state, and horizontal transmitting, horizontal receiving polarization, the radar returns are strengthened, resulting in sea spikes. The sea spikes have the characteristics of high amplitudes, nonstationary, and non-Gaussian, which have a strong impact on the radar detection of weak marine moving targets. This study proposes a method for sea clutter suppression. Firstly, based on the sea spikes identification and selection method, the amplitude, temporal correlation, Doppler spectrum, and fractional power spectrum properties of sea spikes are analyzed. Secondly, the data to be detected are chosen by selecting the background clutter with minimum mean power, which can also eliminate the sea spikes. Correspondingly, sea clutter is suppressed with improved Signal-to-Clutter Ratio （SCR）. Finally, the results of experiment with real radar data verify the effectiveness of the proposed method.

关 键 词：海杂波抑制 海尖峰 特性分析 分数阶功率谱 动目标检测(MTD) 

分 类 号：TN951[电子电信—信号与信息处理]