| 基于改进子空间投影的无源雷达弱目标检测方法 |
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| 引用本文： | 徐定杰,吕东泽,沈锋.基于改进子空间投影的无源雷达弱目标检测方法[J].宇航学报,2011(10). |
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| 作者姓名： | 徐定杰 吕东泽 沈锋 |
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| 作者单位： | 哈尔滨工程大学自动化学院; |
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| 基金项目： | 国家自然科学基金(60704018) |
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| 摘 要： | 基于子空间投影的无源雷达弱目标检测方法是将回波通道接收信号投影到与多径干扰子空间和强目标子空间均正交的子空间内,需要构造的投影矩阵维数过大,导致计算量很大。为了解决这一问题,利用多次小维数投影代替大维数投影,提出了一种改进的无源雷达弱目标检测方法。首先将接收信号投影到多径干扰的正交补子空间内,然后连续地将信号投影到强目标的正交补子空间内,最终达到干扰抑制和弱目标检测的目的。本方法可以有效抑制多径、强目标干扰,在保持检测性能的同时大幅度降低计算量,提高了方法的实时性。仿真结果表明了方法的有效性。
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| 关 键 词： | 无源雷达 干扰抑制 子空间投影 弱目标检测 |
An Improved Subspace Projection Based Method for Weak Target Detection in Passive Radar |
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| XU Ding-jie,LV Dong-ze,SHEN Feng.An Improved Subspace Projection Based Method for Weak Target Detection in Passive Radar[J].Journal of Astronautics,2011(10). |
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| Authors: | XU Ding-jie LV Dong-ze SHEN Feng |
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| Institution: | XU Ding-jie,LV Dong-ze,SHEN Feng(Dept.Automation,Harbin Engineering University,Harbin 150001,China) |
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| Abstract: | The subspace projection approach is used for interference suppression and weak target detection in passive radar systems.The signal received in the echo channel is projected onto the subspace orthogonal to both multi-path interference and strong targets subspace.With this method,the computational load is very high due to the large size of the projection matrix.To reduce the computational load,an improved weak target detection method which replaces the large size projection matrix with several small size pro... |
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| Keywords: | Passive radar Interference suppression Subspace projection Weak target detection |
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