CDMA擴頻通信系統(tǒng)地址碼的研究.pdf

1、分類號UDC密級y855801單位代碼!Q151CDMA擴頻通信系統(tǒng)地址碼的研究指導教師孫嬌燕李婷學位授予單位職稱副教授大連海事大學申請學位級別碩士學科與專業(yè)通信與信息系統(tǒng)論文完成日期2006年3月論文答辯日期2006年3月25日答辯委員會主席TheStudyoftheAddr舂sCodeUsedinCDMASpreadingSpectrumCommunicationSystemAbstraotAlongwiththe3一generat

2、ionmobilecommunicationsystemdevelopsfromtheinvestigationphasetotheactualbusinessusingphase，thetechniquestandardof30isafocusofresearchinginvariouscountriesAsthecoretechnologyof3G，CDMA(CodeDivisionMultipleAccess)ismuchmore

3、thefocusThepaperstudiesthetechnologyoftheaddresscodeofCDMAcommunicationsystemThereintoincludinganalysisanddiscussionofthewayofgenerationandcorrelationcharacteristicofspreadingspectrumsequencesusedin3Gs)rstemInthispaper，i

4、tfirstlybrieflyintroducestheaddresscodestatedinthe3standardsof3Gcommunicationsystem(WCDMAinEurope，cdma2000inUSA，andTDSCDMAinChina)；andthendiscussesthemethodsofgenerationandcorrelationcharacteristicofmSequences，GoldSequen

5、cesMSequencesandthemultiplexsequencesstructuredbyWalshSequencesandGold／MSequencesrespectivelyDesignsandgivesforwardtheMATLABprogramsofcreatingandarithmeticofcorrelationfunctionofthesequencesenumerated；andaftermakingUseof

6、amassofdataandfiguresgotbyMATLABprogramstoanalysesthecharacteristicofgenerationandcorrelationofeachsequencementionedabove，bringsforwardsomepertmentusefulconclusionsPutsforwardtheapplicablequalificationandimprovedmethodso

7、fcalculatingcorrelationfunctionbyusingCyclotomicCosetandgeneratebalancedGoldSequencesinhardwarewaysbasedonvalidatingandanalyzingagainandagainAtlastitcombinestheaddresscodeusedintheactualCDMAcommunicationsystemtostudyandc

8、omparethewayofthegenerationandthecorrelationcharacteristicofthemultiplexsequences，andgetssomedisciplinarianandspecialtyintheircorrelationfunctionsThepapervalidatesalltheconclusionsbyMATLABTheresultshowsthattheimprovedmet