CAJ | 학술논문

针对合成孔径雷达地面动目标显示（SAR-GM TI）系统中动目标径向速度估计存在模糊的问题，提出了基于双通道两视干涉相位差实现无模糊估计径向速度的方法。该方法在距离频率域构造两视数据，将不同通道数据做干涉处理以得到两视数据的干涉相位。两视数据的干涉相位差不存在缠绕问题，可以用来无模糊地估计径向速度。理论推导证明，所提方法有效提高了最大不模糊速度。文中着重分析了两视数据距离频率间隔对径向速度估计性能的影响。通过仿真和实测数据处理验证了所提方法。
침대합성공경뢰체지면동목표현시（SAR-GM TI）계통중동목표경향속도고계존재모호적문제，제출료기우쌍통도량시간섭상위차실현무모호고계경향속도적방법。해방법재거리빈솔역구조량시수거，장불동통도수거주간섭처리이득도량시수거적간섭상위。량시수거적간섭상위차불존재전요문제，가이용래무모호지고계경향속도。이론추도증명，소제방법유효제고료최대불모호속도。문중착중분석료량시수거거리빈솔간격대경향속도고계성능적영향。통과방진화실측수거처리험증료소제방법。
Based on dual-channel two-look interferometric phase difference , a new method is proposed to estimate the radial velocity of a moving target unambiguously in the synthetic aperture radar/ground moving target indication ( SAR/GM TI) system . The two-look data is constructed in the range frequency domain , and interferometric phases of two-look are obtained by interferometry between the data of different channels . Since the interferometric phase difference of the two-look is not wrapped , the proposed method can be used to estimate the radial velocity of a moving target unambiguously . And the maximum unambiguous radial velocity is effectively improved by the proposed method . The effect on radial velocity estimation by the interval of the two-look data in range frequency is focused . Numerical and real data are processed to demonstrate the effectiveness of the proposed method .