NC-OFDM系统基于导频的信道估计算法研究的开题报告.docx

NC-OFDM系统基于导频的信道估计算法研究的开题报告摘要：正交频分复用（OFDM）是一种高效的多载波调制技术，被广泛应用于无线通信系统中。后来，非线性多普勒效应的存在导致OFDM系统的传输质量降低，尤其是在高速移动情况下。非正交的OFDM（NC-OFDM）技术通过采用非正交子载波，可以有效克服多普勒效应，提高系统的性能。然而，NC-OFDM的信道估计仍然是一个挑战，因为非正交子载波之间的相互影响导致频域间的互相关，同时非正交导致时间域间的互相关。在本文中，我们将探讨NC-OFDM的信道估计算法，重点分析基于导频的信道估计算法，实验结果表明，采用导频的信道估计算法可以取得较好的效果。关键词：非正交的OFDM，信道估计，导频，多普勒效应。Abstract:Orthogonalfrequencydivisionmultiplexing(OFDM)isanefficientmulti-carriermodulationtechniquethatiswidelyusedinwirelesscommunicationsystems.However,theexistenceofnonlinearDopplereffectscanleadtoadecreaseinthetransmissionqualityofOFDMsystems,especiallyinhigh-speedscenarios.Non-orthogonalOFDM(NC-OFDM)technology,whichusesnon-orthogonalsubcarriers,caneffectivelyovercomeDopplereffectsandimprovesystemperformance.However,channelestimationinNC-OFDMisstillachallengeduetotheinter-carrierinterferencecausedbynon-orthogonalsubcarriersinthefrequencydomainandtheinter-symbolinterferencecausedbynon-orthogonalsubcarriersinthetimedomain.Inthispaper,wewillexplorethechannelestimationalgorithmofNC-OFDM,focusingonthechannelestimationalgorithmbasedonpilots.Experimentalresultsshowthattheuseofpilotsforchannelestimationcanachievebetterperformance.Keywords:Non-orthogonalOFDM,ChannelEstimation,Pilots,DopplerEffects.