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首页> 外文期刊>Radar, Sonar & Navigation, IET >Range-dependent clutter suppression approach for non-side-looking airborne radar based on orthogonal waveforms
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Range-dependent clutter suppression approach for non-side-looking airborne radar based on orthogonal waveforms

机译：基于正交波形的非侧视机载雷达距离相关杂波抑制方法

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摘要

Clutter suppression is a challenging problem in non-side-looking airborne radar (NSLAR) because of the range-dependent clutter. It is more intractable when the NSLAR operates at high pulse repetition frequency (HPRF). In this study, a cascaded algorithm is presented to realise clutter suppression for NSLAR with HPRF. A novel orthogonal-waveform-based elevation adaptive beamforming method is proposed to suppress range-dependent near-range clutter at the first stage, and the residual range-independent far-range clutter is suppressed by azimuth-Doppler space-time adaptive processing (STAP) at the second stage. The proposed elevation beamformer can provide excellent performance on near-range clutter suppression because of the developed secondary data selection strategy. After suppression of the range-dependent near-range clutter, the range independency of clutter samples is enhanced evidently. Hence, the clutter suppression performance obtained by azimuth-Doppler STAP methods could be improved dramatically. Numerical examples are given to verify the validity of the proposed algorithm.
机译：由于距离相关的杂波，杂波抑制在非侧面机载雷达（NSLAR）中是一个具有挑战性的问题。当NSLAR在高脉冲重复频率（HPRF）下运行时，这更棘手。在这项研究中，提出了一种级联算法，以实现HPRF对NSLAR的杂波抑制。提出了一种新颖的基于正交波形的仰角自适应波束形成方法，用于在第一阶段抑制距离相关的近距离杂波，并通过方位多普勒时空自适应处理（STAP）来抑制剩余的距离无关的远距离杂波。 ）在第二阶段。由于已开发的辅助数据选择策略，提出的仰角波束形成器可在近距离杂波抑制方面提供出色的性能。在抑制了与距离相关的近距离杂波后，杂波样本的距离独立性明显增强。因此，可以大大提高通过方位多普勒STAP方法获得的杂波抑制性能。数值算例验证了所提算法的有效性。

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