Side Null Analysis of the Main-Auxiliary Antenna Array for Noncooperative Interference Cancellation

IF 1.2 4区计算机科学 Q4 ENGINEERING, ELECTRICAL & ELECTRONIC

International Journal of Antennas and Propagation Pub Date : 2023-11-30 DOI:10.1155/2023/7718693

ZheYu Li, JiaHao Zhang, YaXing Li, FangMin He, HongZhang Gao, Jin Meng

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引用次数: 0

Abstract

In interference cancellation, the null at the angle of arrival (AoA) of interference can suppress interference. However, due to the large spacing between array elements and the periodicity of the array, some small nulls at the angles of noninterference are formed inevitably. When the AoA of the desired signal is in these small nulls, they impair the effectiveness of interference cancellation by attenuating the desired signal. This paper proposes the concept of a side null to represent these nulls in the noninterference direction. And the cancellation ratio of the desired signal (SCR) is deduced to quantitatively characterize the side null. The spatial noncooperative interference cancellation model based on the main-auxiliary antenna array is established. Based on this, the SCR is derived to evaluate the amount of desired signal attenuation. Then the simulation, respectively, in two-dimensional plane and three-dimensional space, describes the side null visually. Moreover, the method of side null reduction is discussed by modulation of the array. Finally, the existence of side null and its influence on interference cancellation are verified through the experiments. The results of the simulation and experiment are in good agreement, and both support the theoretical analysis.

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非合作干扰消除的主辅天线阵侧零分析

在干扰消除中，干涉到达角处的零点可以抑制干扰。但由于阵元间距大，阵元的周期性，不可避免地在互不干涉角处形成一些小的零点。当期望信号的AoA处于这些小的零点时，它们会使期望信号衰减，从而影响干扰消除的有效性。本文提出了边零的概念来表示这些无干涉方向上的边零。并推导了期望信号的抵消比(SCR)来定量表征侧零。建立了基于主辅天线阵的空间非合作干扰消除模型。在此基础上，导出可控硅来评估所需的信号衰减量。然后分别在二维平面和三维空间进行仿真，直观地描述了边零。此外，还讨论了通过调制阵列来减少边零的方法。最后，通过实验验证了边零的存在及其对干扰消除的影响。仿真结果与实验结果吻合较好，均支持理论分析。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

International Journal of Antennas and Propagation ENGINEERING, ELECTRICAL & ELECTRONIC-TELECOMMUNICATIONS

CiteScore

3.10

自引率

13.30%

发文量

158

审稿时长

3.8 months

期刊介绍： International Journal of Antennas and Propagation publishes papers on the design, analysis, and applications of antennas, along with theoretical and practical studies relating the propagation of electromagnetic waves at all relevant frequencies, through space, air, and other media. As well as original research, the International Journal of Antennas and Propagation also publishes focused review articles that examine the state of the art, identify emerging trends, and suggest future directions for developing fields.