MIMO-OFDM系統(tǒng)中信道盲估計(jì)方法的研究.pdf

1、學(xué)科門婁—墨——!L分監(jiān)o—衛(wèi)蝗!L單位代日—』蝗!!一密緞：——孫杰瓴嘎蕓讒碩士學(xué)位論文論文題目：坐!堅(jiān)Q二Q業(yè)堅(jiān)墨笙主堡望盲估計(jì)方法的研究學(xué)生姓名學(xué)號(hào)指導(dǎo)教師學(xué)科專業(yè)研究方向論文提交日期郭士偉碩050719曹雪虹教授墮蘭!墮星些壟現(xiàn)代通信中的信號(hào)與信息處理技術(shù)oo八年四月南京郵電大學(xué)碩上研究生學(xué)位論文摘要AbstractChannelestimationisveryessentialintheMIMO—OFDMdetectorfor

2、coherentdemodulationandspace—timecode(STC)decodingChannelCanoftenbeestimatedbytrainingsequencesoraidofpilots，buttheywastebandwidthandreducetheefficiencyofsystemsThedemandforhighdataratetransmissionthusmakesblindchanneles

3、timationattractiveSowefocusonblindchannelestimationinthispaperInthisthesis，weinvestigateablindchannelestimationmethodanditsimprovedmethoddeeplyTheimprovedmethoddiscardsthedisturbedcyclicprefixdatumincomparisonwiththeexis

4、tedalgorithm。ThesimulationshowsitsbetterperformancethanthesimilaralgorithmAlso，twoblindchannelestimationmethodswhichcombineSTCandlinearprecodingatthetransmitterarestudiedFirstlyablindchannelestimationalgorithmforspace—ti

5、meOFDMwithtwotransmittingantennasandtworeceivingantennasisdiscussedItscomputationalcomplexityisveryhigh，becausethechannelisestimatedbyeigendecomposingtwiceSecondly，ablindchannelestimationbasedonlinearprecodingisstudiedTh

6、eprecodingintroducescorrelationstotheinputsThechannelisestimatedbyeigen—decomposingthestatisticalauto—correlationmatrixofreceivedsignalsonce，butthismethodhaserrorfloorBasedontheresearchofthismethod，weproposeanewimpairedp