BER Analysis Of Multi-carrier Signal Under Different Real Channels

In order to research the performance of multi-carrier signal in real channels, theBER of OFDM and MC-CDMA system has been simulated under high speed railwaymobile and digital television terrestrial broadcasting channel in this thesis. As a schemethat combinesOFDM and CDMA technology, multi-carriercode division multiple access(MC-CDMA) technology inherited the advantages of OFDM and CDMAcan against ISIeffectively and has the effect of frequency diversity.First of all, this thesis introducedthe OFDM and three kinds ofmulti-carriermodulationschemes that combine OFDM and CDMA, emphasized on thefundamental principles of OFDM and MC-CDMA, then the mathematics models weregiven. Then after the analysis of fading feature of wireless channel, high speed railwaymobile channel and digital television terrestrial broadcasting channel were modeledbasing on the modeling method of fading channel and parameters inrelatedreference.Last, the BER of OFDM and MC-CDMA system under twoabove-mentioned channels were simulated by using matlab, then the simulation figureswere given.This thesis provided useful data and reference project for system realization underreal environment by simulating the BER of OFDM and MC-CDMA system.