摘要
为了提高极化敏感阵列应对任意来向、任意极化状态干扰的抑制能力,提出了一种基于对消盲区最小化的极化敏感阵列分析和优化方法。首先,基于干扰信号的空域信息和极化域信息,提出了对消盲区概念,建立了共点双极化线阵的对消盲区模型。然后,基于对消盲区模型,推导了对消盲区的数学表达式,量化了阵列的有效对消范围,并给出了一种基于微元法的求解方法。之后,提出了基于对消盲区的极化敏感阵列优化方法,该方法能够通过优化阵元间距使对消盲区最小化。最后,通过数值仿真表明,在探测阈值为12.6 dB、干扰频率为3 GHz、干噪比(interference to noise ratio,INR)为50 dB、信噪比(signal to noise ratio,SNR)为20 dB条件下,该方法可以将四元共点双极化线阵的联合域对消盲区占比降至0.217%,证明了优化方法的有效性。
In order to improve the ability of polarization-sensitive arrays to cope with interference from any direction and any polarization state,a polarization-sensitive array analysis and optimization method based on cancellation blind area minimization is proposed.Firstly,based on the space information and polarization domain information of the interference signal,the concept of cancellation blind area is proposed,and the cancellation blind area model of the common-point dual-polarization linear array is established.Then,based on the cancellation blind area model,the mathematical expression of the cancellation blind area is deduced,and the effective cancellation range of the array is quantified,and a solution method based on the infinitesimal method is given.After that,a polarization-sensitive array optimization method based on the cancellation blind area is proposed,which can minimize the cancellation blind area by optimizing the spacing of the array elements.Finally,numerical simulation shows when the detection threshold is 12.6 dB,and the interference frequency is 3 GHz,and the interference to noise ratio(INR)is 50 dB and the signal to noise ratio(SNR)is 20 dB,this method can reduce the proportion of joint domain cancellation blind area of the quadruple common-point dual-polarization linear array to 0.217%,which proves the effectiveness of the optimization method.
作者
高宏璋
葛松虎
郭宇
孟进
GAO Hongzhang;GE Songhu;GUO Yu;MENG Jin(Institute of Military Electrical Science and Technology,Naval University of Engineering,Wuhan 430033,China;National Key Laboratory of Science and Technology on Vessel Integrated Power System,Naval University of Engineering,Wuhan 430033,China)
出处
《系统工程与电子技术》
EI
CSCD
北大核心
2023年第11期3455-3464,共10页
Systems Engineering and Electronics
基金
国家自然科学基金(61801501,61801502,62241111,62301588)
国家杰出青年科学基金(52025072)
湖北省自然科学基金(ZRMS202001331)资助课题。
关键词
极化敏感阵列
阵列优化
干扰对消
对消盲区
polarization sensitive array
array optimization
interference cancellation
cancellation blind area
