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1、目錄摘要IIIAbstractV第一章緒論11.1引言11.2OFDM的提出和發(fā)展2第二章OFDM原理52.1引言52.2多載波調(diào)制52.3并行傳輸體制概述92.4OFDM基本原理102.5OFDM系統(tǒng)性能特點(diǎn)132.6本章小結(jié)14第三章基于OFDM的無(wú)線局域網(wǎng)173.1引言173.2物理層結(jié)構(gòu)173.3OFDMPLCP子層183.4仿真分析213.4.1SystemView軟件簡(jiǎn)介213.4.2無(wú)線局域網(wǎng)的實(shí)現(xiàn)框圖223.4.3采用SystemView進(jìn)行仿真分析。223.5本章小結(jié)24第四章總結(jié)與展望25致謝27參考文獻(xiàn)29-29--29-正交頻分復(fù)用OFDM技術(shù)的研究摘要OF
2、DM（OrthogonalFrequencyDivisionMultiplexing）即正交頻分復(fù)用，是一種特殊的多載波調(diào)制技術(shù)。OFDM全稱為正交頻分復(fù)用（OrthogonalFrequencyDivisionMultiplexing），是一種新型的高效的多載波調(diào)制技術(shù)，它能夠有效地對(duì)抗多徑傳播，使受到干擾的信號(hào)能夠可靠地接收。經(jīng)過(guò)幾十年的開(kāi)發(fā)之后，OFDM/COFDM不但被廣泛地應(yīng)用于高速數(shù)字通信中，而且已擴(kuò)展到其他領(lǐng)域。同時(shí)現(xiàn)代數(shù)字信號(hào)處理技術(shù)和超大規(guī)模專用集成電路（VLSI）的發(fā)展也使得快速傅立葉變換的實(shí)現(xiàn)變的更加容易，使該技術(shù)的實(shí)現(xiàn)費(fèi)用更趨實(shí)際，為以后OFDM廣泛應(yīng)用于通
3、信領(lǐng)域開(kāi)辟了道路。論文首先研究了OFDM理論，重點(diǎn)分析了在頻率選擇性衰落信道中OFDM技術(shù)解決碼間干擾問(wèn)題的原理；總結(jié)分析了基于OFDM的無(wú)線局域網(wǎng)，利用SystemView對(duì)基于OFDM無(wú)線局域網(wǎng)系統(tǒng)進(jìn)行了仿真，并對(duì)可能影響結(jié)果的信噪比、調(diào)制映射和信道進(jìn)行了分析，結(jié)果符合預(yù)期。關(guān)鍵詞：正交頻分復(fù)用，多載波調(diào)制，信噪比，調(diào)制映射-29--29-TheresearchoftheOrthogonalFrequencyDivisionMultiplexingOFDMtechnologyAbstractOFDM(OrthogonalFrequencyDivisionMultiplexing
4、)thatisOrthogonalFrequencyDivisionMultiplexing,isaspecialmulti-carriermodulationtechnique.OFDMfullnameOrthogonalFrequencyDivisionMultiplexing(OrthogonalFrequencyDivisionMultiplexing),isanewtypeofhighlyefficientmulti-carriermodulationtechnique,itcaneffectivelyfightagainstmulti-pathcommunication
5、,sothatthesignalinterferencecanreliablyreceive.Afterseveraldecadesofdevelopmentafter,OFDM/COFDMhasbeenwidelyusedinhigh-speeddigitalcommunications,andhasspreadtootherareas.Atthesametimemoderndigitalsignalprocessingtechnologyandultra-large-scaleapplicationspecificintegratedcircuits(VLSI)alsomake
6、sthedevelopmentofthefastFouriertransformtoachievechangemoreeasilysothatthecostofthetechnologytoachievemorepractical,forthefutureOFDMwidelyusedinthefieldofcommunicationopenTheroad.AtthefirstthePapersResearchtheOFDMtheory,andonthefocusofthefrequencyselectivefadingchannelOFDMtechnologytosolvethei
7、nterferenceproblembetweenthecodeofprinciple;summaryofOFDM-basedwirelesslocalareanetwork,usingtheSystemViewOFDM-basedwirelessLANsystemsimulationandMayaffecttheoutcomeofthesignaltonoiseratio,modulationandchannelmappingananalysisoftheresul
