Figure 6

BER performances of different schemes in multi-user MIMO downlink systems where residual CFOs are present. Multi-user MIMO downlink settings in the presence of residual CFOs (unit: subcarrier spacing) where Q=4, $M_{\mathrm{T}}^{\left(\text{BS}\right)}=8$, $M_{\mathrm{R}}^{\left(\text{tot}\right)}=12$, d=8; the ITU Ped-A channel is considered; E_s denotes the energy of each 16 QAM symbol, and N₀ represents the noise power spectral density.