基于九元均匀圆阵的MUSIC测向方法研究.docx

基于九元均匀圆阵的MUSIC测向方法研究
摘要：
本文研究基于九元均匀圆阵的MUSIC测向方法。首先，介绍了MUSIC算法的基本原理，包括子空间分解、谱估计、信号分离和测向计算等步骤。然后，介绍了九元均匀圆阵的构建原理，包括阵元坐标计算和电路连接方式。接着，基于MUSIC算法和九元均匀圆阵，详细讨论了MUSIC测向方法的具体实现步骤。最后，使用MATLAB仿真和实测对比分析了MUSIC测向方法的精度和稳定性，结果表明该方法能够实现高精度的信号测向，对于目标信号的弱化和杂波的抑制也具有较好的性能。
关键词：MUSIC算法；九元均匀圆阵；测向方法；精度；稳定性
Abstract:
ThispaperfocusesontheresearchofMUSICdirectionfindingmethodbasedonthenine-elementcirculararray.Firstly,thebasicprinciplesoftheMUSICalgorithmareintroduced,includingsubspacedecomposition,spectrumestimation,signalseparation,anddirectionfindingcalculation.Then,theconstructionprinciplesofthenine-elementcirculararrayareintroduced,includingthecalculationofarrayelementcoordinatesandcircuitconnectionmethods.Next,basedontheMUSICalgorithmandthenine-elementcirculararray,thespecificimplementationstepsoftheMUSICdirectionfindingmethodarediscussedindetail.Finally,MATLABsimulationandactualmeasurementcomparisonswereusedtoanalyzetheaccuracyandstabilityoftheMUSICdirectionfindingmethod.Theresultsshowthatthismethodcanachievehigh-precisionsignaldirectionfinding,andalsohasgoodperformanceinweakeningthetargetsignalandsuppressinginterference.
Keywords:MUSICalgorithm;nine-elementcirculararray;directionfindingmethod;accuracy;stability
Introduction:
Directionfindingtechnologyisessentialinmanyfields,suchasnavigation,communication,military,andsoon.Inrecentyears,variousdirectionalfindingmethodshavebeendeveloped,includingbeamforming,timedifferenceofarrival(TDOA),andfrequencydifferenceofarrival(FDOA).Amongthesemethods,themultiplesignalclassification(MUSIC)algorithmiswidelyusedduetoitshighprecisionandrobustperformance.
TheMUSICalgorithmisbasedontheeigenvaluedecompositionofthecorrelationmatrixofthereceivedsignal,whichcaneffectivelyseparatethesignalandnoisesubspace.Byestimatingthesignalspectrum,thedirectionofarrival(DOA)canbecalculatedaccurately.However,theperformanceoftheMUSICalgorithmdependsonthearrayconfigurationandthenumberofthearrayselements.
Inthispaper,wefocusontheMUSICdirectionfindingmethodbasedonthenine-eleme