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针对非均匀环境对双通道杂波抑制干涉合成孔径雷达(CSI-SAR)系统的影响,提出了一种新的自适应CSI(ACSI)算法——中值对消ACSI算法。该算法将中值估计方法引入权系数估计过程,代替原有的统计平均方法对自适应过程求解,从而得到对消权系数较准确的估计值。仿真试验表明,该算法在非均匀环境中可有效降低权系数的估计误差,取得满意的杂波抑制效果,是可行的合成孔径雷达(SAR)/地面动目标指示(GMTI)杂波抑制方案。
Aiming at the influence of non-uniform environment on two-channel clutter suppression interferometric synthetic aperture radar (CSI-SAR) system, a new Adaptive CSI (ACSI) algorithm, median cancellation ACSI algorithm, is proposed. This algorithm introduces the median estimation method into the process of estimating the weight coefficients, instead of solving the adaptive process instead of the original statistical average method, so as to obtain a more accurate estimate of the weight coefficients. The simulation results show that this algorithm can effectively reduce the estimation error of the weight coefficients and achieve satisfactory clutter suppression in non-uniform environment, and is a feasible SAR / GMTI clutter suppression scheme.