A Robust Iterative Method for Wideband DoA Estimation with a Uniform Circular Array
A Robust Iterative Method for Wideband DoA Estimation with a Uniform Circular Array
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DOI：
10.1109/icc45041.2023.10279130
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发表时间：
2023-05
期刊：
影响因子：
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通讯作者：
Xiaorui Ding;Wenbo Xu;Yue Wang
中科院分区：
文献类型：
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作者：
Xiaorui Ding;Wenbo Xu;Yue Wang
随着无线通信系统中的数据速率不断增加，宽带方向（DOA）估计是可取的。在本文中，提出了一种具有均匀的圆形阵列的宽带二维DOA估计的迭代相干信号空间方法，其中包括每次迭代中的三个步骤。第一步选择了后续聚焦过程的频点子集，以避免不必要的复杂性。第二步实现了聚焦过程，其中设计了用于生成具有鲁棒性的聚焦矩阵的角度间隔，然后将所选频率点的信号 - 空格集中在参考频率中。第三步估计DOA具有多个信号分类（音乐）算法，其中音乐空间频谱的范围受到上述角度间隔的约束，从而进一步降低了复杂性。根据先前的估计结果对当前迭代中提出的方法的关键参数进行了调整。模拟结果表明，与基准方法相比，所提出的方法具有更好的性能和实施效率。
Wideband direction-of-arrival (DoA) estimation is desirable with the ever-increasing data rate in wireless communication systems. In this paper, an iterative coherent signal-subspace method for wideband two-dimensional DoA estimation with a uniform circular array is proposed, which includes three steps in each iteration. The first step selects a subset of frequency points for the subsequent focusing process to avoid unnecessary complexity. The second step realizes the focusing process, where the angle intervals for generating focusing matrices with robust-ness are designed, and then the signal-subspaces at the selected frequency points are focused into a reference frequency. The third step estimates DoAs with the multiple signal classification (MUSIC) algorithm where the range of MUSIC spatial spectrum is constrained by the aforementioned angle intervals, thereby further reducing the complexity. The key parameters of the proposed method in the current iteration are adjusted based on the previous estimation results. The simulation results show that the proposed method enjoys better performance and implementation efficiency when compared with benchmark methods.