摘要
针对当前天线噪声抑制方法不能有效处理主瓣干扰,导致噪声抑制效果差的问题,提出了基于5GHz无线频段的复合数字阵列天线噪声抑制方法。根据5GHz无线频段相关理论设计出复合数字阵列天线。因目标到达天线方向与角度的不同,将噪声干扰分为主瓣干扰与旁瓣干扰,主要对主瓣干扰引起的波束形变、方向曲线失真等情况进行抑制。对噪声影响下的追踪信号进行差波束零点约束处理,运用倒数约束法限制单脉冲比曲线,将其保持在曲线线性条件内,同时利用阻塞矩阵降低追踪信号自由度,实现对天线噪声的有效抑制。仿真结果表明,研究方法的数字单脉冲测向精度高,噪声抑制耗时短,效果好。
At present, the antenna noise suppression method cannot deal with the main lobe interference effectively, resulting in poor noise suppression effect. Therefore, a method of noise suppression of composite digital array antenna based on 5 GHz wireless band was proposed. Firstly, a composite digital array antenna was designed based on the theory of 5 GHz wireless band. Due to the difference between arrival direction and angle, the noise interference was divided into main lobe interference and side lobe interference, which were mainly used to suppress the beam deformation and direction curve distortion caused by the main lobe interference. The tracking signal under the influence of noise was processed by the difference beam zero constraint. In addition, the reciprocal constraint method was used to limit the curve of monopulse ratio and keep it in the linear condition of curve. Moreover, the blocking matrix was used to reduce the free degree of tracking signal, so as to effectively suppress the antenna noise. Simulation results show that the proposed method has high monopulse direction finding accuracy. Meanwhile, the noise suppression time is short and the noise suppression effect is good.
作者
李敏
汪鑫
毛盼娣
LI Min;WANG Xin;MAO Pan-di(City Collegeof Science and Technology,Chongqing University,Chongqing 402167,China)
出处
《计算机仿真》
北大核心
2020年第5期119-123,共5页
Computer Simulation
基金
重庆市教委科学技术研究项目(KJQN201802503)
2018年重庆市本科高校大数据智能化类特色专业建设项目(渝教高发[2018]12号).
关键词
无线频段
复合数字阵列
天线噪声抑制
主瓣干扰
差波束零点约束
5GHz wireless band
Composite digital array
Antenna noise suppression
Main lobe interference
Difference beam zero constraint
