CAJ | 학술논문

在窄带数字阵列波束形成中,通过补偿各阵元之间的时延带来的相移而合成波束.对于宽带数字阵列,相同的时延不同的频率会带来相移的不同,窄带波束形成方法会导致宽带波束方向图畸变,必须采用宽带数字波束形成技术.通过分析信号带宽对窄带数字波束形成的影响,以及宽带数字波束形成的原理,给出了基于分数时延的宽带数字波束形成方法和仿真的结果,在数字域上实现了宽带波束形成.
재착대수자진렬파속형성중,통과보상각진원지간적시연대래적상이이합성파속.대우관대수자진렬,상동적시연불동적빈솔회대래상이적불동,착대파속형성방법회도치관대파속방향도기변,필수채용관대수자파속형성기술.통과분석신호대관대착대수자파속형성적영향,이급관대수자파속형성적원리,급출료기우분수시연적관대수자파속형성방법화방진적결과,재수자역상실현료관대파속형성.
Conventional depends on compensating phase?shift resulting from time delay between array elements. For wide?band digital array,the same time delay and different frequency bring different phase shift. The narrowband digital array beam?forming method results in beam pattern deviation and main lobe distortion in broadband beamforming. Through the analysis of im?pacts of signal bandwidth on narrowband digital beamforming and the principles of wideband digital beamforming,the paper in?troduces the broadband beamforming method based on fractional delay. The analysis and simulation results show that the method is effective for broadband beamforming.