ieee802.16e標準ldpc譯碼器fpga設計與實現

1、西南交通大學碩士學位論文IEEE802.16e標準LDPC譯碼器FPGA設計與實現姓名：楊建平申請學位級別：碩士專業(yè)：通信與信息系統指導教師：陳慶春20100301西南交通大學碩士研究生學位論文第1I頁AbstractSincebeingrediscoveredin1990s，LDPCcodeshaveattractedpeople’Sattentionandhavebecomeanotherresearchfocusofchannel

2、codingfiledafterTurbocodesbecauseoftheircapacityapproachingerrorcorrectioncapabilityandtheadvantagesoflowdecodingcomplexityandhighdecodingthroughputTodayLDPCcodeshavebeenwidelyappliedindifferentcommunicationsystemssuchas

3、DVB—S2，CMMBandWiFiLDPCcodesaretheoptionalchannelcodingschemeintheIEEE80216estandardWiththeprogressintheLDPCcodesinrecentyears，thereisahighprobabilitythatLDPCcodeswillbeutilizedinthefuturefourthgenerationmobilecommunicati

4、onsystemsInthispaper，theFPGAdesignandimplementationoftheLDPCdecoderfortheIEEE80216estandardishighlighted，andthethesisisorganizedasfollowsFirstlytheerror—correctionperformanceanddecodingcomplexityofseveralsoftdecisiondeco

5、dingalgorithmsarepresentedtocomparetheachivedreliabilityandtheimplementationcomplexityFinallyitisshownthat，theOffsetMin—Sumalgorithmisareasonablechoiceforthehardwareimplementationduetoitsrealiabilityandlowimplementationc

6、omplexityMeanwhile，itisvalidatedthat，theoffsetfactor∥=O125andthefixedpointformof(6：3)ishighlyrecommendedthroughputthesoftwaresimulationsSecondly，afterthecomparisonoftheimplementationarchitectureofsomeknownLDPCdecodercode

7、cs，thepartiallyparallelarchitecture，whichmeetswiththequasi—cyclicLDPCdecodingnature，isadoptedasthebasicdecodingarchitectureMoreover，someimprovedmethodsarepresentedtomakethepartiallyparalleldecodingstructuretosupportnoton

8、lyallofthe6kindsofcoderateand19kindsofcodelengthspecifiedbytheIEEE80216estandard，butalsosupporttheconsecutiveblockdatadecodingprocessingandtheearlyiterationstoppingcriterionThirdly，theLDPCdesignandimplementationisvalidat

9、edontheModelSim—basedfunctionalsimulationtestplatform，andthensynthesizedontheStratixIIGXfamilyFPGAdevicesbyusingQuartusIIsoftwarekitAndthesynthesisresultsshowthat，therealizeddecodersupportsathroughputuptomorethan95Mbpsfo