| 摘要: |
| 非合作双基地雷达收发分置的布局模式很大程度上规避了电磁干扰，然而其在工作中面临大量的近程地杂波干扰，目标淹没在大量杂波中难以检测，尤其对于以脉冲雷达为外辐射源的非合作双基地雷达而言，杂波的处理更加困难。本文面向以脉冲雷达为外辐射源的非合作双基地雷达，针对其实际工作中面临大量近程地杂波掩盖目标的问题，提出了时域单脉冲ECA-CMAP杂波抑制方法。首先在经典的时域杂波抑制方法ECA的基础上提出了基于杂波时延估计的改进方案，在抑制近程地杂波的同时将目标完整地保留下来，且对信杂比的提升约50dB；其次，提升目标信杂比后结合使用Nitzberg杂波图算法进一步提高目标检测概率。仿真和实测数据处理验证了算法的有效性。 |
| 关键词: 非合作双基地雷达 运动目标检测 地杂波抑制 时域扩展相消 杂波图 |
| DOI： |
| 分类号:TN958.97 |
| 基金项目:国家自然科学基金项目（面上项目，重点项目，重大项目） |
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| ECA-CMAP Clutter Suppression Method for Passive Bistatic Radar |
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| Abstract: |
| Passive bistatic radar (PBR) avoids electromagnetic interference to a great extent because of the layout mode of transmitting and receiving separately. However, it faces a lot of short-range ground clutter interference in its work, and it is difficult to detect the target when it is submerged in a lot of clutter, especially for PBR with pulse radar as its external radiation source, the clutter processing is more difficult. In this paper, a time-domain monopulse ECA-CMAP clutter suppression method is proposed for PBR with pulse radar as external radiation source, aiming at the problem that it faces a large number of short-range ground clutter to cover up the target in practical work. Firstly, based on the classical time domain clutter suppression method ECA (extensive algorithm cancellation), an improved scheme based on clutter time delay estimation is proposed, which can suppress short-range ground clutter and keep the target intact, and the signal-to-clutter ratio is increased by nearly 50dB, and the target detection probability is further improved by using Nitzberg clutter map algorithm. Simulation and result of measured data processing verify the effectiveness of the algorithm. |
| Key words: passive bistatic radar moving target detection ground clutter suppression time domain extensive cancellation clutter map |