摘要
针对宽带相控阵雷达中的关键技术如子阵划分、数字波束形成以及宽带自适应干扰对消等展开研究,给出了宽带阵列划分的准则和方法并以线性调频信号为例提出了一种数字波束形成方法和宽带自适应干扰对消算法。该方法应用数字时变相位补偿方法代替传统的时间延时单元形成主波束,降低了系统的复杂度并提高了波束形成的性能。基于拉伸处理的宽带自适应干扰对消算法对宽带旁瓣干扰和主瓣干扰都有较好的抑制作用,在强的宽带干扰下仍然可以很好地对目标进行高分辨成像。
For the key technologies of wideband phased array radar such as sub-array partition,digital beam forming and adaptive interference cancellation techniques are studied.Wideband sub-array partition rule and method are presented in this paper.Moreover,digital beam forming and adaptive Interference cancellation algorithm based LFM waveform are also proposed.Conventional analog time delay units are superseded by frequency-dependent digital phase weight in the proposed method,which reduces complexity of the system and improves beam forming performance.The method of adaptive wideband Interference cancellation based stretch processing has good restrain ability with mainlobe disturbance and sidelobe disturbance,as a result,it can provide high resolution target image even under strong interferences.
出处
《中国电子科学研究院学报》
2010年第4期337-343,共7页
Journal of China Academy of Electronics and Information Technology
基金
国家自然科学基金项目(60901068)
关键词
雷达
宽带
相控阵
数字波束形成
干扰对消
radar
wideband
phased array
digital beam forming
interference cancellation
