改进的通道补偿法检测高频雷达机动目标  

Improved channel compensation method for maneuvering target detection in OTH radar

作　　者：雷志勇[1] 黄银河[1] 周海峰[1] 倪菁[1] 

机构地区：[1]中电集团南京电子技术研究所,江苏南京210013

出　　处：《系统工程与电子技术》2009年第4期822-825,共4页Systems Engineering and Electronics

摘　　要：通过FFT进行相干积累以提高SNR的高频雷达传统信号处理方式无法有效发现机动目标。基于低的算法复杂度和处理实时性的考虑,提出了改进的多通道补偿算法检测高频雷达机动目标。首先对补偿后的通道-多普勒谱图进行频率校正以弥补补偿导致的信号频率偏移,进而根据选大的原则以及设置掩模函数进行通道合成以实现抗杂波发散的单通道检测,最后引入峰值检测进一步降低运算量和虚警。理论分析和数据处理都表明该算法具有低运算量、低虚警以及稳健的特点,因而具备较强的工程实用性。Conventional FFT-based signal processing technique in OTH radar can not detect maneuvering target effectively. Channel compensation method is improved, in which computational load and real-time realization are fully considered. The improved algorithm corrects compensation-caused frequency bias in the channel- Doppler spectrum, and then greatest-of principal is used to achieve channel synthesizing for one-channel detection. Finally, peak detection technique is introduced to lower the detection load and false alarm. Analysis and data processing show that the improved algorithm has low complexity, low false alarm and robustness.

关 键 词：高频雷达 机动目标检测 多通道补偿 频率校正 通道合成 

分 类 号：TN958.93[电子电信—信号与信息处理]