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Sequential DOA estimation method for multi-group coherent signals

机译：多组相干信号的顺序DOA估计方法

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摘要

In order to cope with multi-group coherent signals induced by multipath propagation, this paper presents a novel approach to estimate the direction of arrivals (DOAs) of each group sequentially. For each time, we just estimate the DOAs of one group which has the minimum coherent signals based on forward spatial smoothing (FSS), and the information of this group is eliminated from the array covariance matrix with oblique projection technique. Then we estimate the next group similarly until all groups are estimated. Afterwards, we use the forward/backward spatial smoothing (FBSS) to further improve the estimation accuracy of the DOAs in each group separately. The new method not only utilizes less array sensors to resolve multi-group coherent signals, but also estimates the same DOAs from different groups. Simulation results are presented to demonstrate the effectiveness of the proposed method especially in low signal-to-noise ratio (SNR) and small number of snapshots.
机译：为了应对由多径传播引起的多组相干信号，本文提出了一种新颖的方法来顺序估计每个组的到达方向（DOA）。对于每次，我们仅基于前向空间平滑（FSS）估计一组具有最小相干信号的DOA，然后使用倾斜投影技术从阵列协方差矩阵中消除该组的信息。然后，我们类似地估计下一组，直到估计所有组。然后，我们使用前向/后向空间平滑（FBSS）进一步分别提高每个组中DOA的估计准确性。新方法不仅利用更少的阵列传感器来解析多组相干信号，而且还可以估计来自不同组的相同DOA。仿真结果表明了该方法的有效性，特别是在低信噪比（SNR）和少量快照的情况下。

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  • 来源
    《Signal processing》 |2017年第1期|169-174|共6页
  • 作者

    Jinqiang Wei; Xu Xu; Dawei Luo; Zhongfu Ye;

  • 作者单位

    National Engineering Laboratory for Speech and Language Information Processing, Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China;

    National Engineering Laboratory for Speech and Language Information Processing, Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China;

    National Engineering Laboratory for Speech and Language Information Processing, Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China;

    National Engineering Laboratory for Speech and Language Information Processing, Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei, Anhui 230027, People's Republic of China;

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  • 原文格式 PDF
  • 正文语种 eng
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  • 关键词

    Array signal processing; Direction of arrival estimation; Multi-group coherent signals; Multipath propagation;

    机译：阵列信号处理;到达方向估计;多组相干信号;多径传播;

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