摘要
研究低截获概率(LPI)雷达信号的准确检测问题。LPI雷达信号检测中经常受到地海面、电离层的反射及杂散回波的影响,造成LPI雷达信号的关键特征模糊、多径干涉、能量衰减等问题。传统的信号检测算法受杂波干扰影响较大且检测具有很大的盲目性,很难对这种随机干扰下的LPI雷达信号建立有效的检测模型,造成雷达信号检测的准确性不高。为解决上述难题,提出了一种抗杂波干扰的LPI雷达信号检测算法,首先利用已知某一LPI信号的先验知识创建匹配模板库,为LPI雷达信号的检测提供准确的数据依据,然后利用具有低副瓣和信号滤波处理等功能的雷达接收机有效地抑制了杂波的干扰,实现了该算法在频域上的快速匹配,实验结果表明,新算法能够有效的提高LPI雷达信号检测的准确性。
A new LPI radar signal detection algorithm with anti-interference is put forward. A matched template library is built based on the priori knowledge of one known radar signal, which provides an accurate data basis to the LPI radar siginal detection. The clutter interference is resisted by using the doppler radar receiver which has function of low sidelobe and signal filter processing. The fast matching in the frequency domain is realized. The experimental result shows that the matched template algorithm can effectively improve the accuracy of LPI radar signal detection.
出处
《计算机仿真》
CSCD
北大核心
2015年第9期19-23,共5页
Computer Simulation
关键词
低截获概率
杂波干扰
匹配模板
信号检测
Low probability of intercept
Clutter interference
Matched template
Signal detection
