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arXiv 2303.09053eess.SP
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低信噪比场景下使用阵列反馈波束成形的鲁棒到达方向估计

Robust Direction-of-Arrival Estimation using Array Feedback Beamforming in Low SNR Scenarios

Parth Mehta, Kumar Appaiah, Rajbabu Velmurugan

AI总结:

本文提出一种基于重传空间反馈和MVDR的阵列波束成形DoA估计方法,在低信噪比下将角度估计误差降低20度。

摘要:

本文提出了一种基于新型空间IIR波束成形的到达方向(DoA)估计方法。我们提出了一种基于重传的空间反馈方法,用于发射和接收天线阵列,该方法改善了波束成形器的性能参数,即半功率波束宽度(HPBW)、旁瓣抑制和方向性。通过定量比较,我们表明我们的方法优于先前使用单发射天线的反馈波束成形方法和传统波束成形器。然后,我们将基于重传的最小方差无失真响应(MVDR)波束成形器与反馈波束成形设置相结合。我们提出了两种方法,表明其中一种方法在降低估计误差方面更优,并将其用作DoA估计方法。然后,我们将该方法与多信号分类(MUSIC)、利用旋转不变技术估计信号参数(ESPRIT)、鲁棒MVDR、嵌套阵列MVDR和降维MVDR方法进行比较。结果表明,在信噪比(SNR)为-60 dB至-10 dB的范围内,所提方法的角度估计误差比先前方法低20度。

英文摘要:

A new spatial IIR beamformer based direction-of-arrival (DoA) estimation method is proposed in this paper. We propose a retransmission based spatial feedback method for an array of transmit and receive antennas that improves the performance parameters of a beamformer, viz. half-power beamwidth (HPBW), side-lobe suppression, and directivity. Through quantitative comparison, we show that our approach outperforms the previous feedback beamforming approach with a single transmit antenna, and the conventional beamformer. We then incorporate a retransmission based minimum variance distortionless response (MVDR) beamformer with the feedback beamforming setup. We propose two approaches, show that one approach is superior in terms of lower estimation error, and use that as the DoA estimation method. We then compare this approach with Multiple Signal Classification (MUSIC), Estimation of Parameters using Rotation Invariant Technique (ESPRIT), robust MVDR, nested-array MVDR, and reduced-dimension MVDR methods. The results show that at SNR levels of -60 dB to -10 dB, the angle estiation error of the proposed method is 20 degree less compared to that of prior methods.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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