LDPC碼及其模擬VLSI譯碼實現(xiàn)初探.pdf

1、分類號型!!!UDC密級Y808392重慶郵電學院碩士學位論文論文題目!!墮亟墾基蕉墼!豎!堡亟壅墨墊堡(題名和副題名)作者姓名唐紹偉指導教師姓名張德民教援(職務、職稱、學位、單位名稱)申請學位級別王堂亟專業(yè)名稱逼籃皇焦宣丕筮論文提交日期2立Q4二二嬰論文答辯同期2004—6—6學位授予單位和日期童盤蟲魚差瘟2竺盛《目論文評閱人簽金塑塑盤遂曼主叁堡答辯委員會主席塹壟豎蠡筮‘國際十進分類法UDc》的類號2004年5月20R重慶郵電學院工學

2、碩士學位論文英土摘復AbstractLDPCcodeshavethecap8b【1ityofapproachShannonlimitontheconditionofcombinewithiterationdecodesonthebaseofBPandhavesameerrorcontrolperformancewithTurbocodesatleastespeciallyforirregularLDPCcodes卟ichspecialt

3、yis：performanceisbetterthanTurbocodesanddescribesimplyhavethetestabilityforstricttheoryanalysis，andadapttotealizationbyhardwarebecausedecodecowplexityislow，andhavegreatpotentialofhighspeeddecodeduetothroughputisgreatThee

4、xcelledperCo)manceofLDPCcodesandwhichgoodapplicationforegroundintelecⅧunicationfieldhavealreadybeenattachimpomtancetoacademeandITfieldoftheworldasaresearchhotpointoferrorcontrolfieIdnowSothesignifieationofacadme，business

5、，andtechnologyprogessofITfieidisgreatUsually。themorecomplexityofencodescheme，themorerobustofcodesprotectcapabititybutdecodeismoredifficutatthesametime。Thecomplexttyofdecodeisincreasefasterthanlinelyincreasewithcode’sIeng

6、thincrease。Soneedgreatcomputecapabilitytorealizeapplianceontime。whichrestrictit’sapplianceinpracticeNow，itisurgencythatfindnewdecodewaystodecreacepowerandimprovedecodespeedsFactorgraphisabidirectiongraphandbothsum—produc

7、talgoritheandminimumsumalgorithmarebasetheproprietyfactorgraphDecodeforinceptsequencebypropagatedofinformationbetweenofnodesoffactorgraphforLDPCcodesAndcangreatlyimprovespeedsofdecodeduetofactorgraph’sintercharacteristic

8、easyrealizebyparaI_lelwaysThesum—productalgorithmusualIyisdesignedadigitalcircuitstructarematchwithafactorgraph，andevernodeonthefactorgraphseemedasesmallprocessor，Buttheinvestigateshowedsum—productalgurithmwighebedisasse

9、mbledsomehasicoperationwhichcalledsum～productmoduleinrecentyearsSum—productmodulemightbedireotlyrealizebysimplyanalogleansistor，andhavewonderfulmatchbetweenprobabilitytransmitandcharacteristiooftransistorSowightdirectlyo

10、omposinganalogVLSIiteatondecodenetworkandtheanalogdecederhavegreatdecodespeedsandvery10wpowerbecausewhicheliminatediterationbysettingnetworkbehaviormodule，so，theresearchisveryimportanttopromoteLDPCcodesapproachThispaperi

11、nvestigateddecodesalgorithmandwaysuseinginceptswaveamplitudeorwhichsample’sanalogvaluesonthebaseofanelgsisstructureandfactorgraphmoduleofLDPCcodesanddeeplydiscussedhowtodesignedaanalogdecoderbydesigneda(16，2，4，regularLDP

12、Ccodesdeocoder，andsimulateditbypspice91thisdecoderisparallal，nonlinearandcouldnormallyworkandhavelowerDowerandgreatspeedsthispaperisfoundationofanalogdecoderofLDPCcodesandfutureworkincludeanalogdecoder’sautomanticsysthes