CAJ | 학술논문

超宽带(UWB)信号波束形成是 UWB 雷达的关键性技术。传统的波束形成方法存在瞬时带宽和扫描角度受限，波束偏移等问题，直接延时补偿法是避免上述问题的有效途径。该文提出了基于 Hermite 插值滤波器的直接延时补偿波束形成方法，理论分析和仿真结果均表明 Hermite 插值滤波器幅频特性和群时延特性优于目前常用的Lagrange和径向基插值滤波器。超宽带线性调频信号实例仿真也表明了该方法在超宽带波束形成性能方面的优越性。
초관대(UWB)신호파속형성시 UWB 뢰체적관건성기술。전통적파속형성방법존재순시대관화소묘각도수한，파속편이등문제，직접연시보상법시피면상술문제적유효도경。해문제출료기우 Hermite 삽치려파기적직접연시보상파속형성방법，이론분석화방진결과균표명 Hermite 삽치려파기폭빈특성화군시연특성우우목전상용적Lagrange화경향기삽치려파기。초관대선성조빈신호실례방진야표명료해방법재초관대파속형성성능방면적우월성。
Beamforming of Ultra Wide Band (UWB) signals is a crucial technology in UWB radar. Conventional beamforming methods have limitations in instantaneous bandwidth, scanning range, beam pattern deviation and a mainlobe distortion. Direct Time Delay (DTD) compensation is an effective way to avoid above problems. In this paper, a DTD compensation based on Hermite interpolation filters is presented to implement beamforming of UWB signals. Theoretical analysis and simulation results show that the magnitude responses and group delay of the proposed filters are better than those based on Lagrange and Radial basis methods. The demonstration of the UWB Linear-Frequency modulated (LFM) signal also shows excellent performances on the UWB beamforming of the proposed method.