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Single-Snapshot DOA Estimation in MIMO Radar Using Fast Iterative Interpolated Beamforming

机译:MIMO雷达中的单快照DOA估计,使用快速迭代插值波束形成

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In this work we propose a computationally efficient beamforming based algorithm for direction of arrival (DOA) estimation of multiple sources in Multiple-Input-Multiple-Output radar. It has long been held that, in the case of multiple sources, subspace methods such as Root MUSIC and ESPRIT are necessary to separate close sources and deliver unbiased estimates. However, in addition to the heavy computational burden, these methods require spatial smoothing in the single snapshot case and are unable to extract correlated sources. In contrast, our proposed algorithm recruits the recently proposed and computationally efficient Fast Iterative Interpolated Beam-former (FIIB) to achieve accurate DOA estimation without the need for spatial smoothing. We show how the FIIB can be applied to the MIMO DOA problem both in the overlapped and non-overlapped virtual array cases. We also demonstrate that the proposed estimator outperforms the Root-MUSIC algorithm in both cases.
机译:在这项工作中,我们提出了一种基于计算的基于比较的基于波束成形的基于波束形成的多输入 - 多输出雷达的到达方向(DOA)估计。已经持续了,在多种来源的情况下,将诸如root音乐和esprit等子空间方法来分离密切源并提供无偏见的估计。但是,除了重量计算负担之外,这些方法还需要在单个快照案例中进行空间平滑,并且无法提取相关源。相比之下,我们所提出的算法招募最近提出的和计算上有效的快速迭代插座射线(FIIB),以实现准确的DOA估计,而无需空间平滑。我们展示了FIIB如何在重叠和非重叠的虚拟阵列案例中应用于MIMO DOA问题。我们还证明,所提出的估计器在两种情况下都能优于根乐算法。

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