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1、AbstractInunderwateracousticcommunication,Inter-SymbolInterferencecausedbymultipathfadingtime-varyingunderwateracousticchannelsseriouslyaffectscommunicationqualityandthelimitedbandwidthofunderwateracousticchannelsaffectsthedataofthetransmissionspeedandthereliability．InordereffectivelyovercomeISIandi
2、mprovethebandwidthutilizations，onthebasisofanalyzingblindequalizationalgorithmsresearchsituationathomeandabroad，anewtrainofthoughtisproposed．Inthisproposedthought,inordertoresearchtheblindequalizationtheory，algorithms，simulations，andperformanceassessment,wavelettheoryisregardedasanimportanttool，arti
3、ficialfishswarmalgorithm，arecalledastheoptimizationmethod，andfirIactionallyspaced，superexponentialiteration,andblindequalizationalgorithmarecombined．nemainworkisasfollows：1．Orthogonalwavelettransformblindequalizationalgorithmbasedontheoptimizationofartificialfishswarmalgorithmisproposed(1)Blindequal
4、izationalgorithmbasedontheoptimizationofartificialfishschoolalgorithmisproposedIntraditionalConstantModulusblindequalizationAlgorithm(CMA)，themetholdofsearchingoptimalweightvectorisagradientdescentsearchmethod，whichCanobtaintheequationoftheequalizerweightvectorviausingthecontinuousandderivablecostfu
5、nction,butthemetholdiseasytofallintolocalconvergence．AimingatthedisadvantageofthesearchingmetholdoftraditionalCMA，onthebasisofanalyzingthefeatureofartificialfishswarmalgorithm(AFSA)，itisintroducedtotheCMA，SOtheartificialfishswarmalgorithmbasedCMA(AFSACMA)isproposed．Inthisproposedalgorithm，thefitness
6、functionofAFSAisdefinedbycostfunctionofblindequalizationalgorithm．ItmakesfulluseoftheglobalrandomsearchingfeatureoftheAFSAtofindtheglobaloptimalweightvectoroftheequalizer．SimulationresultswithunderwateracousticchannelshowthesuperiorityoftheAFSACMA．(2)Orthogonalwavelettransformblindequalizationalgori
7、thmbasedontheoptimizationofartificialfishswarmalgorithmOnthebasisofmakingfulluseofthestrongde-correlationoftheorthogonalwavelettransform，thestructureofblindequalizerisdesignedbytheequalizerinputstrans
