| 摘要: |
| 机载雷达接收的杂波回波呈现出具有多普勒带宽，这个带宽取决于平台速度、波束宽度和波长。因此，慢速目标的回波可能会隐藏在杂波频带内以致难于检测。由于飞机的飞行动态特性以及风力影响引起飞行路径的扰动会进一步降低ＭＴＩ的性能。从早期研究者的论文中已证明，线性阵列天线的输出信号端接上空域时域ＦＩＲ滤波器可以自适应补偿平台运动的飞行路径分量，从而大大提高了信号与杂波加噪声之比（ＳＣＮＲ）。这种滤波器是指ＴＡＳ |
| 关键词: 机载雷达 目标显示 运动补偿 |
| DOI：10.3969/j.issn.1001-893X. |
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| 基金项目: |
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| Adaptive Airborne MTI with Two-Dimensional Motion Compensation |
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| Abstract: |
| Clutter returns received by an airborne radar exhibit a Doppler bandwidth which depends on the platform speed, beamwidth and wavelength. Echoes of slow targets may,therefore,be buried in the clutter band and are difficult to detect. Perturbations of the night path due to the flight dynamics of the aircraft and wind effects may cause further degradation of the MTI performance. It has been shown in earlier papers of the author that space-time FIR filters applied to the. output signals of a linear array antenna can be used to compensate adaptively for the night path component of the platform motion so that a large improvement in signal-to-clutter-plus-noise ratio (SCNR) can be obtained. Such filters are referred to as TASTE (techniques for airborne slow target extraction) methods. In the paper these ideas are extended to the compensation of transversal velocity components by means of a planar array with horizontal orientation. The influence of the system bandwidth is also investigated. The results obtained can be generalized to compensate for three-dimensional perturbations of the flight path without using an inertial navigation device. |
| Key words: Airborne Radar, MTI, Motion,Compensation |
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