外文翻译--基于线性预测方法的水声信道最小均方误差盲均衡（节选）

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1、中文3775字毕业设计(论文)外文资料翻译系别电子信息系专业通信工程班级姓名学号外文出处J. Marine Sci. Appl. (2011) 10: 113-120 附件1.原文；2.译文2013年03月BlindAdaptiveMMSEEqualizationofUnderwaterAcousticChannelsBasedontheLinearPredictionMethodRBragos,RBlanco-EnrichAbstract:Theproblemofblindadaptiveequal

2、izationofunderwatersingle-inputmultiple-output(SIMO)acousticchannelswasanalyzedbyusingthelinearpredictionmethod.Minimummeansquareerror(MMSE)blindequalizerswitharbitrarydelayweredescribedonabasisofchannelidentification.TwomethodsforcalculatinglinearMMSEe

3、qualizerswereproposed.OnewasbasedonfullchannelidentificationandrealizedusingRLSadaptivealgorithms,andtheotherwasbasedonthezero-delayMMSEequalizerandrealizedusingLMSandRLSadaptivealgorithms,respectively.Performanceofthethreeproposedalgorithmsandcompariso

4、nwithtwoexistingzero-forcing(ZF)equalizationalgorithmswereinvestigatedbysimulationsutilizingtwounderwateracousticchannels.Theresultsshowthattheproposedalgorithmsarerobustenoughtochannelordermismatch.TheyhavealmostthesameperformanceasthecorrespondingZFal

5、gorithmsunderahighsignal-to-noise(SNR)ratioandbetterperformanceunderalowSNR.1IntroductionTime-varyingcharacteristicandmulti-pathfadingofunderwateracousticchannelscaninducesevereintersymbolinterference(ISI)inhighdataratecommunicationsystems.Channelequali

6、zationapplyingadaptivefiltersisoneofthetechniquestomitigatetheeffectsofISI.Conventionally,theinitializationofanadaptivefilterisachievedbyaknowntrainingsequencefromatransmitterbeforedatatransmission,sothatvaluablechannelcapacityisreduced.Recently,blindeq

7、ualizationtechnique(Stojanovic,1996)hasattractedmoreandmoreattention.Comparedwithadaptiveequalizationtechnique,themajoradvantageofsuchtechniqueisthatnotrainingsequenceisneededtostartuporrestartthesystemwheneverthecommunicationbreaksdownunpredictably.Tra

8、ditionally,symbolratesampledchanneloutputsequenceisstationaryandhigherorderstatisticsareusedtoestimatethechannelandtocalculatetheequalizer.Morerecently,ithasbeenshownthatthechanneloutputsequenceiscyclostationaryifthesamplingratee