非正侧阵雷达距离模糊杂波抑制新方法

doi:10.3969/j.issn.1001-2400.2017.02.001

摘要/Abstract

摘要：

为了改善严重距离模糊情况下雷达对地面强杂波的抑制性能，提出了一种基于频率分集技术的杂波抑制方法．首先，推导了非正侧阵频率分集雷达空时信号模型，在此基础上，给出了频率增量的设计准则用来区分距离模糊杂波以及防止回波信号去相关．然后，利用子空间投影算法抑制距离模糊杂波．仿真试验证明了该方法的有效性，在俯仰维自由度有限的情况下，该方法的性能优于传统俯仰滤波方法．

关键词: 机载雷达, 杂波抑制, 频率分集, 距离模糊

Abstract:

To suppress the seriously range-ambiguous clutter, an approach based on the frequency diverse array (FDA) technique is proposed. Based on the space-time signal model in FDA radar, the frequency increment is designed to distinguish the clutter at ambiguous ranges and avoid signal decorrelation. Then, the subspace projection algorithm is used for range-ambiguous clutter suppression. Numerical simulations show the effectiveness of the proposed method. Even when the number of the elevation degrees-of-freedom (DOFs) is limited, the proposed method performs better than the conventional elevation filtering method.

Key words: airborne radar, clutter suppression, frequency diversity, range ambiguity

吴旭姿;刘峥;谢荣. 非正侧阵雷达距离模糊杂波抑制新方法[J]. 西安电子科技大学学报, 2017, 44(2): 1-7.

WU Xuzi;LIU Zheng;XIE Rong. New method for range-ambiguous clutter suppression in non-side-looking airborne radar[J]. Journal of Xidian University, 2017, 44(2): 1-7.

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