國(guó)際會(huì)議演講稿

自我介紹

Thankyou,Mr./Ms.Chair./professor

Mynameissangqian.Iamveryhonoredtobeheretodooralpresentation.

IamaMasterstudentfromHohaiUniversityandIamcurrentlydoingsomeresearchonphysicallayersecurity.

Today,Iwouldliketosharewithyousomeofmyresearchonrelayselectionincooperativecommunication.(external/ek?st?rn?l;?k?st?rn?l/)

內(nèi)容安排：

Mypresentationincludesthesefiveparts.

First,somebackgroundinformationaboutthisresearch;

Second,systemmodelwehavedone;

Third,NN-basedrelayselectionschemewehaveproposed

Forth,Simulationandresultsanalysis

Andlast,someconclusionswehavegot

P4

Partone,introduction

Firstly,Iwouldliketogiveyouabitofbackground.

Differingfromthetraditionalcryptographictechniquesbasedonsecretkeys,wecanmakeuseofwirelesschannelcharacteristicstoenhancephysicallayersecurity.

Cooperativecommunicationhasbeenwidelyrecognizedasaneffectivewaytocombatwirelessfadingandprovidediversitygainwhichisoneoftheresearchhotspots.

Machinelearningasanemergingtechnologyhasbeenwidelyappliedinimageprocessing,cancerprediction,stockanalysisandotherfields.Sowhynottryitinwirelesscommunication?

P5:

Next,Iwanttotalkalittlebitaboutpresentstudy

Recentstudiesondeeplearningforwirelesscommunicationsystemshaveproposedalternativeapproachestoenhancecertainpartsoftheconventionalcommunicationsystemsuchasmodulationrecognition、channelencodinganddecoding、channelestimationanddetectionandanautoencoderwhichcanreplacethetotalsystemwithanovelarchitecture

【modulationrecognition:AnNNarchitectureformodulationrecognitionthatconsistsofa4-layerNNandtwotwo-layerNNs。

channelencodinganddecoding：AplainDNNarchitectureforchanneldecodingtodecodekbits

messagesfromNbitsnoisycodewords。

channelestimationanddetection：Adense-Netforsymbol-to-symboldetectioncanadoptlongshort-termmemory(LSTM)todetectanestimatedsymbol.

Autoencoder：theautoencodercanrepresenttheentirecommunicationsystemandjointlyoptimizethetransmitterandreceiveroveranAWGNchannel.

】

P6

Sowhydidweconductthisresearch?Well,wewanttoexploitthepotentialbenefitsofdeeplearninginenhancingphysicallayersecurityincooperative(

/k??'?p?r?t?v/

wirelesscommunicationandreducethefeedbackoverheadinlimitedspectrumresoucebyourourproposedscheme.

P8

Nowletmemoveontoparttwo-systemmodel

Here,youcanseeafigurewhichisasystemmodel.

Thisisthesource;thesearetherelaynodesandthisisthedestination,thisistheeavesdropper

Thewholeprocessofcooperativewirelesscommunicationcanbedividedintotwophases.

Inthefirstphase,thesourcebroadcaststhesignaltotheoptimalrelaywhichguaranteesperfectsecurity.AsshowninFig1,representsafadingcoefficientofthechannelfromthesourcetotherelaynode(.)

Inthesecondphase,theoptimalrelayforwardsascaledversionofitsreceivedsignaltothedestinationinthepresenceoftheeavesdropper,wheretheoptimalrelayisconsideredtoadoptamplify-and-forward(AF)relayscheme.

Inthisfigure,

representsafadingcoefficientofthechannelfromtherelaytothedestination

representsafadingcoefficientofthechannelfromtherelaytotheeavesdropper.

P9:

Hereyoucanseesomefollowingexpressions.Iamnotgoingtowasteourprecioustimeonthelengthyderivation.Iwouldliketoinviteyoutodirectlytakealookattheequationinitsfinalform.

Thisistheoptimalindexoftheselectedrelaywiththeconventionalrelayselectionscheme.Amaongthisexpression

representstheachievablesecrecyrateofsystemmodelwhentherelayisselected.

stateinformationwherethelegitimatelinksandwiretaplinksare