一种改进的零陷展宽波束形成算法  

An Improved Null Broadening Beamforming Algorithm

作　　者：王亚辉 李文兴[1] WANG Yahui;LI Wenxing(College of Information and Communication Engineering,Harbin Engineering University,Harbin,Heilongjiang 150001,China)

机构地区：[1]哈尔滨工程大学信息与通信工程学院,黑龙江哈尔滨150001

出　　处：《宜宾学院学报》2023年第6期62-66,共5页Journal of Yibin University

摘　　要：针对常规自适应波束形成器因零陷较窄、在出现干扰运动时输出性能下降的问题,提出一种基于投影变换和虚拟天线技术的零陷展宽波束形成算法,利用干扰导向矢量和矩阵锐化技术构造投影变换矩阵,并用其对接收数据进行预处理同时结合对角加载技术得到新的协方差矩阵,引入虚拟天线技术扩展协方差矩阵和导向矢量进行自适应波束形成.算法在零陷展宽的同时可以加深零陷,能有效抑制快速运动干扰,提高阵列天线波束形成的输出性能.仿真结果验证了算法的有效性和优越性.Aiming at the problem that the output performance of conventional adaptive beamforming decreases when the inter⁃ference moves due to narrow null,a null broadening beamforming algorithm based on projection transformation and virtual an⁃tenna technology is proposed.The algorithm uses interference steering vector and matrix taper to construct the projection trans⁃formation matrix which is used to transform the received data,combined with diagonal loading technique to get the new covari⁃ance matrix,also the virtual antenna technology is introduced to expand the covariance matrix and steering vector for adaptive beamforming.The method can broaden beam null width and enhance the null depth simultaneously,effectively suppress the fast motion interference and improve the output performance of array antenna beamforming.The simulation results verify the effec⁃tiveness and superiority of the algorithm.

关 键 词：矩阵锐化 投影变换 虚拟天线 零陷展宽 自适应波束形成 

分 类 号：TN911.7[电子电信—通信与信息系统]