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首页> 外文期刊>IEEE Transactions on Aerospace and Electronic Systems >Robust space-time adaptive processing for airborne radar in nonhomogeneous clutter environments
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Robust space-time adaptive processing for airborne radar in nonhomogeneous clutter environments

机译：非均匀杂波环境下机载雷达的鲁棒时空自适应处理

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摘要

Space-time adaptive processing (STAP) holds tremendous potential for the new generation airborne surveillance radar, in which the phased array antennas and pulse Doppler processing mode are adopted. A new STAP approach using the multiple-beam and multiple Doppler channels is presented here for airborne phased array radar. The approach with space-time multiple-beam (STMB) architecture is robust to array errors and has very low system degrees of freedom (DOFs). Hence, it has low sample support requirement and it is very suitable for the practical planar phased array radar under nonhomogeneous clutter environments. Meanwhile, a new nonhomogeneous detector (NHD) based on the correlation dimension (CD) is also proposed here, which is used as an effective method to screen tracing data prior to detection processing. It can further improve the performance of the STAP approach in the severely nonhomogeneous clutter environments. Therefore, a scheme that incorporates the correlation dimension nonhomogeneity detector (CD-NHD) with the STMB is recommended, which we term CD-NHD-STMB. The experimental simulation results indicate that: 1) the STMB processor is robust to array element error and has high performance under nonhomogeneous clutter environments; 2) the CD-NHD is also effective on the nonhomogeneous clutter. As a result, the CD-NHD-STMB scheme is robust to array element error and nonhomogeneous clutter, and therefore available for airborne phased array radar applications.
机译：空时自适应处理（STAP）对于采用相控阵天线和脉冲多普勒处理模式的新一代机载监视雷达具有巨大的潜力。本文介绍了一种用于机载相控阵雷达的，使用多波束和多普勒信道的STAP新方法。具有空时多波束（STMB）架构的方法对于阵列错误具有鲁棒性，并且系统自由度（DOF）非常低。因此，它具有较低的样本支持要求，非常适合非均匀杂波环境下的实用平面相控阵雷达。同时，本文还提出了一种基于相关维数（CD）的新型非均匀检测器（NHD），作为检测处理之前筛选数据的有效方法。它可以在严重不均匀的杂乱环境中进一步提高STAP方法的性能。因此，建议采用将相关维数非均匀性检测器（CD-NHD）与STMB结合在一起的方案，我们将其称为CD-NHD-STMB。实验仿真结果表明：1）STMB处理器对数组元素错误具有鲁棒性，并且在非均匀杂波环境下具有高性能。 2）CD-NHD对非均匀杂波也有效。结果，CD-NHD-STMB方案对阵列元件误差和非均匀杂波具有鲁棒性，因此可用于机载相控阵雷达应用。

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