空间域相关法抗X波段航海雷达同频干扰

发布时间：2018-08-03 12:15

【摘要】：根据X波段航海雷达图像中海杂波的空间相关特性,提出了一种用于检测与抑制同频干扰噪声的方法。首先采用恒虚警率法确定合适阈值,利用相关法检测出干扰噪声线在雷达图像上的位置,然后利用一种改进型拉普拉斯线性增强模板实现干扰线上噪声点的定位,进而采用分段插值方法对检测出的噪声点进行修复以滤除噪声。利用实测雷达数据测试所提算法性能,结果证明:与均值、中值等传统滤波算法相比,所提方法在高海况条件下既能简单快速有效地检测到同频干扰噪声,又能更好地保留原海浪信号的回波信息,满足了海浪信息反演对信号回波质量的要求;在低海况条件下,也能有效去除同频干扰噪声。
[Abstract]:According to the spatial correlation characteristics of sea clutter in X-band navigation radar images, a method for detecting and suppressing the interference noise of the same frequency is proposed. At first, the method of constant false alarm rate is used to determine the appropriate threshold, and the position of jamming noise line on radar image is detected by correlation method. Then, a modified Laplace linear enhancement template is used to locate the noise point on the jamming line. Then the segmented interpolation method is used to repair the detected noise points to filter the noise. The performance of the proposed algorithm is tested by using the measured radar data. The results show that compared with the traditional filtering algorithms such as mean value and median value, the proposed method can detect the interference noise of the same frequency quickly and efficiently under the condition of high sea conditions. It can better retain the echo information of the original wave signal and meet the requirements of wave information retrieval for the signal echo quality, and it can also effectively remove the same frequency interference noise under the condition of low sea conditions.
【作者单位】：哈尔滨工程大学自动化学院;哈尔滨工程大学理学院;
【基金】：国家自然科学基金(11405035) 海洋公益性行业科研专项经费项目(201405022-1) 国防重点型号科研资助课题
【分类号】：TN974

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