摘要
在大孔径宽扫描角情况下 ,利用窄带相控阵发射不出去宽带高分辨信号 ,本文经理论分析说明了这一点 ,并提出两种基于已知波形的宽带宽角相控阵发射波束形成方法 ,给出了实现示意框图 ,通过计算机仿真验证了其可行性 .新方法采用时域数字处理 ,在性能上是最优的 .与时域采用抽头延迟线的FIR滤波器波束形成方法和频域DFT波束形成方法相比 ,文中方法简单 ,所需设备量少 ,易于工程实现 .
Theoretical analysis demonstrates that wideband signal can not be transmitted by using narrowband phased array in scenarios with large aperture and scan angle. Two wideband transmitting beamforming methods radar based on the known waveform in the presence of large scan angle are proposed. The diagrams are given, and simulation results show the effectiveness of two methods. The novel methods employ digital processing in the time domain and are optimal. Compared with the beamforming method utilizing FIR filter consisting of tapped delay lines in the time domain and the beamforming technique with DFT in the frequency domain, the presented methods demand the smaller number of equipment and are easy to be implemented in engineering.
出处
《电子学报》
EI
CAS
CSCD
北大核心
2003年第3期358-360,共3页
Acta Electronica Sinica
基金
国防科技预研基金 (No 99J7 1 1 DZ0 1 1 6)
