摘要
为获得更高的分辨率,以满足目标识别或精确定位的需要,雷达往往采用宽带信号。对于宽带数字阵列雷达,相同的时延不同的频率会带来相移的不同,窄带波束形成通过相位补偿达到补偿时延的方法会导致宽带波束方向图畸变。为实现宽带数字阵列各阵元传输时延的精确补偿,引入分数时延滤波器。并给出了一种基于Farrow滤波器的宽带数字波束形成系统设计方法。
In order to obtain higher range resolution and meet the requirement of target identification or precise location,the radar usually adopts wideband signal.For the wideband digital array radar,the same time delay and different frequency will bring different phase-shift,narrowband beam forming is performed by the method of acquiring the compensation time-delay via phase compensation,which will bring out the distortion of wideband beam pattern.In order to realize the accuracy compensation of transmission time delay of each element for the wide band digital arrays,the fractional time delay filter is introduced in this paper,and the systematic design method of wide band digital beam forming based on Farrow filter is presented.
出处
《舰船电子对抗》
2015年第2期37-41,共5页
Shipboard Electronic Countermeasure
