Transmission performance of OFDM with 1024-QAM in the presence of EVM degradation

This paper presents error vector magnitude (EVM) impact on the transmission performance of OFDM using a higher order modulation scheme such as 256- and 1024-QAM by link-level simulations. BER performance is highlighted as parameters of coding rates for 256- and 1024-QAM in the presence of EVM degradation. Using these results, we clarify the relation of spectral efficiency and channel quality, such as E_b/N_o, to meet a BER of 10^-2 for 64-, 256- and 1024-QAM from the link adaptation perspective. This will be useful for deciding an allowable EVM for each QAM and provide an effective way to help resource management in future mobile systems such as small cells.