CAJ | 학술논문

提出了一种超宽带超稀疏阵列穿墙成像雷达距离向旁瓣和方位向栅瓣抑制的新方法。对于使用步进频连续波的超宽带雷达，其距离向旁瓣较高，通常采用加窗进行抑制。对于超稀疏阵列，其方位向栅瓣较高，可以采用相位相干因子（PCF）加权进行抑制。若同时抑制距离向旁瓣和方位向栅瓣，可以对加窗的图像作 PCF 加权。但是，距离向加窗会抬高方位向栅瓣，进而降低 PCF 抑制方位向栅瓣的效果。针对这个问题，提出一种 PCF 结合双切趾的方法，能够同时有效地抑制距离向旁瓣和方位向栅瓣。仿真和实验结果验证了方法的有效性。
제출료일충초관대초희소진렬천장성상뢰체거리향방판화방위향책판억제적신방법。대우사용보진빈련속파적초관대뢰체，기거리향방판교고，통상채용가창진행억제。대우초희소진렬，기방위향책판교고，가이채용상위상간인자（PCF）가권진행억제。약동시억제거리향방판화방위향책판，가이대가창적도상작 PCF 가권。단시，거리향가창회태고방위향책판，진이강저 PCF 억제방위향책판적효과。침대저개문제，제출일충 PCF 결합쌍절지적방법，능구동시유효지억제거리향방판화방위향책판。방진화실험결과험증료방법적유효성。
This paper introduces a novel range sidelobes and azimuth grating lobes suppression method for ultrawideband ultrasparse array through-the-wall imaging radar.For ultrawideband radar transmitting stepped frequency continuous wave,the sidelobes in the range profile are high,which can usually be reduced by windowing.For ultrasparse array,azimuth grating lobes are strong,which may be suppressed by phase coherence factor(PCF).If both range sidelobes and azimuth grating lobes are to be reduced,one may weigh the windowed image by PCF.Whereas,range windowing raises azimuth grating lobes,depressing the effect of PCF.To solve this problem,a method of PCF combined with dual apodization is proposed,which can suppress both range sidelobes and azimuth grating lobes efficiently.Simulation and experiment results dem-onstrate the validity of the proposed method.