Direct Deterministic Nulling Techniques for Large Random Arrays Including Mutual Coupling
Direct Deterministic Nulling Techniques for Large Random Arrays Including Mutual Coupling
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DOI：
10.1109/tap.2018.2869068
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发表时间：
2018-09
影响因子：
5.7
通讯作者：
Ha Bui-Van;Valentin Hamaide;C. Craeye;François Glineur;E. de Lera Acedo
中科院分区：
文献类型：
--
作者：
Ha Bui-Van;Valentin Hamaide;C. Craeye;François Glineur;E. de Lera Acedo
Effective approaches for interference nulling in large random planar arrays are presented. Starting from the well-known subtraction technique, it is shown that the suppression is only effective when the mutual coupling is taken into account. Moreover, for practical antennas with significant cross-polarization levels, additional efforts are required to null interference in both co- and cross-patterns. Alternative techniques are proposed to efficiently generate null patterns that are able to suppress interferers from the output of the beamformer of large arrays. In particular, a technique exploiting the polarization diversity of modern multiantenna systems is proposed to effectively suppress a large number of interferers while offering high sensitivity. Examples related to SKA1-LOW stations are presented to illustrate the performance of these techniques. Throughout these examples, the embedded element patterns obtained using fast full-wave simulation techniques are exploited to fully account for the effects of mutual coupling.
