Comparison of the radar clutter cancellation performance of post- and pre-Doppler STAP for ground moving target identification from an experimental airborne surveillance radar

Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509) Pub Date : 2004-04-26 DOI:10.1109/NRC.2004.1316472

P. G. Kealey, I.P. Finley

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引用次数: 5

Abstract

Within this paper we report our study that compared the performance of pre-Doppler and post-Doppler STAP processing algorithms applied to the same radar trials data, collected by QinetiQ's Enhanced Surveillance Radar. The performance of these algorithms was quantified by clutter cancellation ratios and target signal improvement factors (the ratio of the signal to clutter plus noise ratios with and without STAP processing). We have shown that pre-Doppler and post-Doppler STAP may be tuned to give the same level of clutter cancellation. We present results in which bright target signatures are seen to affect the STAP processors and reduce the overall clutter cancellation. We have found that for our two phase center trials radar data, PRI staggered post-Doppler STAP gives greatly enhanced clutter cancellation compared to the simple fixed window post-Doppler STAP. The application of either moving window or auxiliary bin post-Doppler STAP was found to degrade the processor output. The importance of normalizing the final range Doppler map to prevent the amplification of thermal noise and remove the weight-norm variation as a function of Doppler is shown to be a critical step to allow interpretation and application of detection algorithms after STAP processing.

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实验机载监视雷达对地面运动目标识别的前后多普勒干扰抵消性能比较

在本文中，我们报告了我们的研究，比较了应用于相同雷达试验数据的前多普勒和后多普勒STAP处理算法的性能，这些数据由QinetiQ的增强型监视雷达收集。这些算法的性能通过杂波消除比和目标信号改善因子(经过和未经过STAP处理的信号与杂波加噪声的比值)来量化。我们已经表明，前多普勒和后多普勒STAP可以调谐，以提供相同水平的杂波抵消。我们提出的结果表明，明亮的目标特征会影响STAP处理器并减少总体杂波抵消。我们发现，对于我们的两相位中心试验雷达数据，与简单的固定窗口后多普勒STAP相比，PRI交错后多普勒STAP大大增强了杂波消除。应用移动窗口或辅助bin后多普勒STAP都会降低处理器输出。对最终距离多普勒图进行归一化以防止热噪声放大和去除作为多普勒函数的权重范数变化的重要性被证明是允许在STAP处理后解释和应用检测算法的关键步骤。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Proceedings of the 2004 IEEE Radar Conference (IEEE Cat. No.04CH37509)

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