Diversely polarised antenna-array-based narrowband/wideband beamforming via polarisational reconstruction matrix inversion
Diversely polarised antenna-array-based narrowband/wideband beamforming via polarisational reconstruction matrix inversion
复制标题
通过极化重建矩阵求逆基于不同极化天线阵列的窄带/宽带波束形成
DOI：
10.1049/iet-spr.2017.0280
复制
发表时间：
2018-05-01
影响因子：
1.7
通讯作者：
Liu，Zhiwen
中科院分区：
文献类型：
--
作者：
Lu，Ying;Xu，Yougen;Liu，Zhiwen
研究了双极化天线阵的波束形成问题。为了避免由非常小的快照数，和/或看方向误差和/或极化失配引起的信号抵消，基于极化重构矩阵求逆的波束形成器被开发用于窄带和宽带情况。主要贡献在于分别通过秩-1和秩-2空间谱技术重构完全极化和部分或随机极化干扰的窄带情况干扰加噪声协方差矩阵和宽带情况聚焦干扰加噪声协方差矩阵。通过大量的仿真评估了所提出的波束形成器对小快照数、观看方向误差、偏振失配和聚焦误差的性能，并在输出信号与干扰加噪声比值和感兴趣信号（SOI）估计的实验偏差方面与一些现有流行的偏振不敏感波束形成器的偏振扩展进行了比较。研究了SOI与干扰方向差、SOI与干扰偏振度、重构积分距离等因素对波束形成性能的影响。
The problem of beamforming using diversely polarised antenna array is addressed in the study. With the attempt to avoid signal cancellation caused by very small snapshot number, and/or look direction error and/or polarisation mismatch, the polarisational reconstruction matrix inversion based beamformer is developed for both the narrowband and wideband cases. The major contribution is on the reconstruction of the narrowband case interference‐plus‐noise covariance matrix and wideband case focused interference‐plus‐noise covariance matrix, for the cases of both completely polarised and partially or randomly polarised interferences, by the rank‐1 and rank‐2 spatial spectrum techniques, respectively. The performance of the proposed beamformer, against small snapshot number, look direction error, polarisation mismatch, and focusing error, was evaluated by extensive simulations, and compared with the polarisational extensions of some existing popular polarisation insensitive beamformers, in terms of the output signal‐to‐interference‐plus‐noise ratio values and the experimental deviation of the signal‐of‐interest (SOI) estimate. The influences of direction difference between SOI and interference, degrees of polarisation of SOI and interference, and integrating range for reconstruction on beamforming performance are also studied.