功率倒置准则下干扰对消空间分辨率分析及优化  

Spatial Resolution Analysis and Optimization of Power-inversion Based Interference Cancellation Algorithm

作　　者：张嘉毫 李亚星 郭宇 吴灏 何方敏[1] 孟进[1] ZHANG Jiahao;LI Yaxing;GUO Yu;WU Hao;HE Fangmin;MENG Jin(National Key Laboratory of Science and Technology on Vessel Integrated Power System(Naval University of Engineering),Wuhan 430033,Hubei Province,China)

机构地区：[1]舰船综合电力技术国防科技重点实验室(海军工程大学),湖北省武汉市430033

出　　处：《中国电机工程学报》2022年第13期4665-4674,共10页Proceedings of the CSEE

基　　金：国家杰出青年科学基金项目(52025072)。

摘　　要：干扰对消是系统级电磁兼容领域关键技术。空域干扰对消利用干扰信号与有用信号达波方向上的差异消除干扰信号,当差异较小时,干扰对消空间分辨能力成为决定算法性能的核心因素。文中对功率倒置准则下干扰对消空间分辨率进行分析,比较干扰对消所形成的空间谱零陷分辨率与天线阵列主波束分辨率的差异,提出以有用信号对消比为指标的干扰对消空间分辨率定量表征方法,研究空间分辨率的性能与影响因素。通过理论仿真分析与实验测试,验证空域干扰对消在典型场景下的超分辨特性。结合辅助天线阵列设计,提出干扰对消系统空间分辨率优化方法。该研究对于探索干扰对消技术的能力边界具有较强的理论价值。Interference cancellation is one of the most important methods of the system-level electromagnetic compatibility research field.When the interference and the signal of interest(SoI)have different angle of arrival(AoA),the spatial-domain interference cancellation can be utilized to suppress the interference.Specially,in the case that the AoA difference between the interference and SoI is small,the algorithm performance of the spatial-domain interference cancellation can be highly related with its spatial resolution characteristic,which was analyzed under the power-inversion criterion in this paper.The spatial spectrum null’s spatial resolution of the interference cancellation was compared with the mainbeam’s of the traditional antenna array beamforming.A quantitative characterization method for the spatial resolution of the interference cancellation was established based on the SoI cancellation ratio(SCR).The super-resolution feature of the interference cancellation algorithm was observed and verified by theoretical analysis and measurement results.The optimization method to enhance the spatial resolution was proposed based on the auxiliary array design.This work can provide theoretical value for exploring the performance boundaries of the interference cancellation techniques.

关 键 词：干扰对消 空间分辨率 功率倒置 空间谱 超分辨 

分 类 号：TN973.3[电子电信—信号与信息处理]