基于新型阵列的双基地电磁矢量传感器MIMO雷达高分辨角度参数估计
谢前朋
*
潘小义陈吉源肖顺平
(国防科技大学电子信息系统复杂电磁环境效应国家重点实验室长沙410073)
摘要:针对双基地EMVS-MIMO雷达角度参数估计问题,该文通过设计新的发射阵列和接收阵列来实现对双基
地EMVS-MIMO雷达角度参数估计精度的提升。相比于半波长的均匀线性发射阵列和接收阵列,所设计的新型阵
列能够实现发射端和接收端阵列孔径的扩展。并且,为了避免发射角和接收角的角度参数额外配对过程,该文利
用平行因子算法来实现发射角和接收角的角度参数自动配对。同时,相应的发射方位角、发射俯仰角、发射极化
角、发射极化相位差和接收方位角、接收俯仰角、接收极化角以及接收极化相位差也是自动配对的。通过利用平
行因子算法多次迭代之后得到的方向加载矩阵,对应于发射角和接收角的精粗估计的旋转不变关系可以从方向加
载矩阵中进行相应的提取。因此,高分辨的发射角和接收角可以通过精粗估计的结合来实现。相比于当前算法,
所提算法具有自动参数配对特性以及较低的计算复杂度。仿真实验表明所提算法具有较高的估计精度。
关键词:双基地MIMO雷达;电磁矢量传感器;新型阵列;平行因子算法
中图分类号:TN958 文献标识码:A 文章编号:1009-5896(2021)02-0270-07
DOI:10.11999/JEIT200130
High Resolution Angle Parameter Estimation for Bistatic
EMVS-MIMO Radar Based on a New Designed Array
XIEQianpengPANXiaoyiCHENJiyuanXIAOShunping
(State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and
Information System, National University of Defense Technology, Changsha 410073, China)
Abstract:AnewtransmitandreceivearrayinbistaticElectroMagneticVectorSensorMultiple-InputMultiple-
Output(EMVS-MIMO)radarsystemisdesignedtoimprovetheangleparameterestimationaccuracy.
ComparedwiththebistaticEMVS-MIMOradarequippedwithhalf-wavelengthspaceduniformlineararrays
bothinthetransmitterandreceiver,thenewdesignedtransmitandreceivearraycanfurtherenhancethearray
aperture.And,automaticallypairedangleparametermatchingprocessfor2DDODand2DDOAcanbe
obtainedwiththeaidoftheparallelfactortrilinearalternatingleastsquarealgorithm.Meanwhile,the
correspondingelevationangle,azimuthangle,polarizationangleandpolarizationphasedifferencebothfor
transmitterandreceiverarealsoautomaticallypaired.Then,theloadingmatricescorrespondingtotransmit
andreceivearraycanbeobtainedbyusingtheparallelfactortrilinearalternatingleastsquarealgorithm.And,
high-accuracyandlow-accuracydirectionsineestimationcanbedeterminedbyextractingtherotation
invariancerelationshipfromtheobtainedloadingmatrices.Thus,highresolutionangleparameterestimation
canbelocatedbycombiningthehigh-accuracyestimatedresultsandlow-accuracyestimatedresults.
Furthermore,theproposedmethodcanprovideautomaticallypairedangleparametermatchingprocessand
lowercomputationcomplexitythanstate-of-the-artmethods.Simulationresultsarecarriedouttoverifythe
excellentangleparameterestimationperformanceoftheproposedmethod.
Key words:BistaticMIMORadar;ElectroMagneticVectorSensors(EMVS);Newdesignedarray;Parallel
factoralgorithm
收稿日期:2020-02-26;改回日期:2020-09-23;网络出版:2020-11-18
*通信作者:谢前朋 13721038905@163.com
基金项目:国家自然科学基金(61701507,61890542,61890540)
FoundationItems:TheNationalNaturalScienceFoundationofChina(61701507,61890542,61890540)
第43卷第2期 电子与信息学报 Vol.43No.2
2021年2月 JournalofElectronics&InformationTechnology Feb.2021