MIMO-DFE coupled with V-BLAST for adaptive equalization of wideband MIMO channels

A new adaptive equalizer is proposed by combining a MIMO-DFE and a V-BLAST detector for frequency-selective fading MIMO channels. The MIMO-DFE cancels ISI while the V-BLAST detector cancels ICI and detects the transmitted symbols. The wideband channel concatenated with the MIMO-DFE is considered as a virtual flat-fading channel. Estimation and tracking of this virtual channel, which is used by the V-BLAST detector, is realized by means of an adaptive filter. Simulation results show that the new equalizer outperforms a previously-proposed adaptive wideband MIMO channel equalizer while requiring a lower computational complexity.