基于軟件無線電的調制自動識別及盲均衡研究.pdf

1、學科門類王堂分類號!盟211單位代碼!Q蘭塑密級——專j／杰啷孿z廖碩士研究生學位論文論文題目：薹王鏊壁垂垡皇箜塑型旦墊識別及盲均衡研究研究指導教學科專研究方申請學位級庫阮秀凱師張志涌教授Jp電路與系統(tǒng)向通信系統(tǒng)和網(wǎng)絡中的控制技術別墮主二oo六年四月南京郵電人學碩卜研究生學位論立ABSTRACTABSTRACTAutomaticmodulationrecognitionandblindequalizationareimportantpa

2、rtsofSoftwaredefinedradio(SDmThispaperstudiesandimprovesseveralexistingapproachesofautomaticmodulationrecognition，andcombinesautomaticmodulationrecognitionwithblindequalizationalgorithmsbasedonfinitealphabetTheseworksare

3、veryvaluablefortheapplicationofSDRThemainworkscanbesummarizedasfollows：(1)WeproposeanewmethodtoidentifyMPSKandMFSKsignalsusingtheGanssianwavelettransform(WT)Theideaoftheproposedmethodimprovestheaccuracyoftheidentifierand

4、canovercometheundetectedinformationproblemofHaarWTmcthod(2)TheapproachbasedonhigherordercumulantsbasedfeaturesforMPSK，MASKandMQAMsignalsclassificationisimprovedTheoreticalargumentsareverifiedviaextensivesimulationsWeveri

5、fyitsrobustnessandsuperioritythroughcomparingwithexistingapproachesFurthermore，theapproachwhichisimprovedextendsthescopeofapplicationoftheoldapproach(3)Aselofcycliccumulant—basedfeaturesforsignalclassificationisusedtoide

6、ntifyMPSKsignalsatthereceiverwhichisderivedasafunctionofexcessbandwidthforaraisedcosinepulseshapeThenweproposeoriginallyanalgorithmbasedoncycliccumulantsfortheautomaticrecognitionofMPSKsignalsoverallintersymbolinterferen

7、ce(ISI)channelsubjectedtoDopplermultipathpmpagationeffects(4)Westudyhowtorecoverysignalbytheblindequalizationalgorithmsbasedonfinitealphabetafterwegetthecorrectlymodulationschemethroughthealgorithmbasedoncyclic—cumulants

8、fortheautomaticrecognitionofMPSKsignalsoveratirnevaryingmultipathchannelsKEYWORDS：SoftwareDefinedRadio；AutomaticModulationRecognition；BlindSignalEqualization；WaveletTransform；High—orderCumulants；Cyclic‘cumulants；FiniteAl