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由于目标信号淹没在强大的、展宽的一阶Ｂｒａｇｇ谱中，高频地波舰载超视距雷达的目标信号检测变得很困难。基于一阶Ｂｒａｇｇ杂波的时空二维耦合特性，本文将天线相位中心偏置（ＤＰＣＡ）技术予以推广并应用于一阶海杂波的抑制。此外，考虑到实际平台运动速度的波动，本文又提出通过空域插值获得等效阵元信号进行空时二维滤波的方法。计算机仿真结果表明：当平台运动速度沿理想值波动较小时，可通过空域插值获得较好的杂波抑制效果。进一步的研究将集中在插值方法的选取及时域插值的研究。
Since the target signal is submerged in a powerful, broadened first-order Bragg spectrum, it becomes difficult to detect the target signal of HF ground-based OTA radar. Based on the spatio-temporal two-dimensional coupling characteristics of first-order Bragg clutter, this paper generalizes the antenna phase center offset (DPCA) technique and applies it to the first-order sea clutter suppression. In addition, taking into account the fluctuations of the actual platform velocity, this paper also proposed a method of space-time two-dimensional filtering by space-domain interpolation to obtain the equivalent array element signal. Computer simulation results show that the clutter suppression effect can be obtained by spatial interpolation when the platform motion velocity fluctuates along the ideal value. Further research will focus on the selection of interpolation methods and the study of time-domain interpolation.