withthe128 / 64/32/16 quadratureamplitudemodulation(QAM)technologyisproposedandexperimentally demonstratedintheorthogonalfrequency-divisionmultiplexing-basedvisiblelightcommunication(OFDM-VLC)system.ByusingtheMB-CAZACprecoding,itcanequalizetheunevensignal到noiseratio(SNR)andreduce thePAPRcomparedwiththetraditionalOFDMsystem.Theexperimentalresultsshowthatthe128 / 64/32 / 16QAMMB-CAZACprecodingoutperformsthetraditionalschemeatdifferentdataratesforOFDM- VLC系统。 所提议方案的光谱效率(SE)高达5.28b / s / Hz。同时,它可以以3.82×10−4的误比特率(BER)成功传输50 cm自由空间。