基于MVDR波束形成的FDA平台外干扰抑制  

FDA platform external interference suppression based on MVDR beamforming

作　　者：陈阳 田波[1] 王春阳[1] 宫健[1] 谭铭 赵英健 CHEN Yang;TIAN Bo;WANG Chunyang;GONG Jian;TAN Ming;ZHAO Yingjian(Air and Missile Defense College,Air Force Engineering University,Xi’an 710051,China;College of Information and Communication,National University of Defense Technology,Wuhan 430010,China)

机构地区：[1]空军工程大学防空反导学院,陕西西安710051 [2]国防科技大学信息通信学院,湖北武汉430010

出　　处：《系统工程与电子技术》2023年第1期32-40,共9页Systems Engineering and Electronics

基　　金：陕西省自然科学基金(2021JM-222);中国博士后科学基金(2019M662257)资助课题。

摘　　要：针对频控阵(frequency diverse array,FDA)在对与目标位置相近的平台外干扰进行抑制时,传统FDA与非线性频偏结合不能实现距离-角度去耦合、对数递增FDA主瓣展宽较大和汉明窗加权FDA距离维旁瓣过高的问题,在充分研究汉明窗加权的线性FDA(Hamming linear FDA,HL-FDA)方案的基础上,对4种频偏方案的性能进行了分析,提出采用FDA多输入多输出结构代替传统的一维均匀线性FDA结构,通过结合最小方差无失真响应(minimum variance distortion free respinse,MVDR)准则,将HL-FDA应用到MVDR自适应波束形成层面,对平台外干扰进行抑制。仿真验证了HL-FDA在结合MVDR自适应波束形成算法后能有效地对抗距离-角度二维平台外干扰。For the frequency diverse array(FDA)to suppress the interference near the target position outside the platform,the combination of traditional FDA and nonlinear frequency offset cannot achieve range-angle decoupling,logarithmic increasing FDA main lobe broadening and Hamming window weighted FDA range dimension sidelobe too high.Based on the full study of the Hamming window weighted linear FDA(HL-FDA)scheme,the performance of four frequency offset schemes is analyzed,and the frequency diverse array multiple-input multiplt-output structure is proposed to replace the traditional one-dimensional uniform linear FDA structure.By combining the minimum variance distortion free response(MVDR)criterion,the HL-FDA is applied to the MVDR adaptive beamforming level to suppress the platform external interference.The simulation results show that the HL-FDA can effectively counter the range-angle two-dimensional platform external interference combined with the MVDR adaptive beamforming algorithm.

关 键 词：频控阵 距离-角度耦合 非线性频偏 最小方差无失真响应 干扰抑制 

分 类 号：TN974[电子电信—信号与信息处理]