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《基于線列陣的主動(dòng)聲納信號(hào)檢測-研究》由會(huì)員上傳分享，免費(fèi)在線閱讀，更多相關(guān)內(nèi)容在行業(yè)資料-天天文庫。
1、AbstractThetargetdetectionunderreverberationbackgroundisanimpoIrtanttopicofactiveson缸ToimpmVetheperfIomallceofreVerberationsuppression，塒de-bandsignalshaVinggoodautocorrelationcharacteristicssuchasFMsignalarecommonlyused，butduetof．a(chǎn)ctorslikeinfluenceoft11eDoppIer，theselec
2、tionoftheref．erencesignalinmatcllingprocessingisaproblem．Inaddition，thestrongbackgrourIdintllematch．filteroutputcausedbymeproximityreverberationisalsoa11importantfactoraa、ectingthedetectionoftlletargetecho．Thispaperdiscussedtheselectionoftheref．erencesi印alaIldmecontextba
3、lanceintargetdetection．Meanwmle，ittakesthelinearrayasaJlex鈾nple，providinganactivesonardetectionsystemdesignandsoft、vareimplementation．Theclassicsignaldetection廿leoryisfirstlyintroduced，aIldthenmeactivesonarsystemmodel，thesonarequationandmein們ductionofmecommolllyusedLFMtm
4、smittedsi阻alaregiven．Intheactiveson甌inadditiontothetargetecho，t11edatacollectediIlsonarreceiVingarraysincludesthereverberationnoise．Thetmditionalmethodstoimprovethegainofthesi盟alprocessingaret11ebeam-f．omlingandthematchedfilter．ThefomerimprovesⅡleprocessingspacegain，andt
5、he1atterimproVesmesi印altimegain．TheDoppler丘equencys11iftl(Ilo、ⅧinnlenarrowbandsystemmustbereplacedbytheexpansionorcontractionoftlletimescaleinthebroadbaIldsystem．Thetimescaleexpendswhentheta瑪etisawayf而mthereceivingarrays，orcoll]【presseswhentheta唱etisclosetot11ereceiVinga
6、rrayForthedigitaJsonarprocessingsystem，itisdimculttochangetllesi盟al’stimescale，soaV撕ables鋤plingratemethodisproposed．Byusingadi疏rentsanlplingratetosaI】1plethe仃ansmissionsi朗al，itcallachievetllepurposeoft11escales缸．etcllinga11df．requencysearclling．Witllbackgroundestimationa
7、lldno眥alization，thesonaurdisplaye丑’ecta11dthedetectionprobabil時(shí)areiIIlproved．Thedirection．dista]ncet、Vo．dimensionalnomalizationalgorimmproposedinthjspaperperf．o姍swellint11eslidi王19windowsmulti-be鋤system．Inaddition，analgoritllmcalledCur、，eFitNomalizationusedtonomalization
8、isproposed．Thesimulationresultsshowmatthet、voalgorithmsalmosthavetllesameperfIonnaJlce．FiIIally，analgor
