CAJ | 학술논문

偏置相位中心天线技术(DPCA)作为空时自适应信号处理(STAP)技术的特殊形式，在合成孔径雷达地面动目标指示(SAR-GMTI)领域得到了广泛的应用。杂波抑制的能力直接决定了 GMTI 的性能，传统的复图像域DPCA技术对于地杂波抑制能力有限，特别是广泛分布着强散射静止地物的城市区域。该文利用干涉相位对DPCA幅度进行非线性加权，提出了一种加权DPCA杂波抑制方法，该方法降低了通道间残差相位对DPCA杂波抑制的影响。实验结果表明：该文方法在杂波抑制能力上优于传统DPCA方法。
편치상위중심천선기술(DPCA)작위공시자괄응신호처리(STAP)기술적특수형식，재합성공경뢰체지면동목표지시(SAR-GMTI)영역득도료엄범적응용。잡파억제적능력직접결정료 GMTI 적성능，전통적복도상역DPCA기술대우지잡파억제능력유한，특별시엄범분포착강산사정지지물적성시구역。해문이용간섭상위대DPCA폭도진행비선성가권，제출료일충가권DPCA잡파억제방법，해방법강저료통도간잔차상위대DPCA잡파억제적영향。실험결과표명：해문방법재잡파억제능력상우우전통DPCA방법。
The Displaced Phase Center Antenna (DPCA) technology, a particular form of Space Time Adaptive Processing (STAP), has been widely used in Synthetic Aperture Radar Ground Moving Target Indication (SAR-GMTI). The GMTI performance depends on the capability of clutter rejection but the traditional DPCA technology operated in the complex image domain does not have the appropriate clutter rejection capability for urban areas with strong scattering stationary objects. Hence, interferometry phase is used to weight the DPCA magnitude nonlinearly, and a weighted DPCA clutter rejection approach is proposed, which reduces the interference from residual phase difference. The experimental results suggest that the new approach can improve the clutter rejection compared with the conventional DPCA.