Multiple-input multiple-output (MIMO) receiver for wideband space-time communications

A new receiver structure able to deliver high data rates in a multiple-input multiple-output (MIMO) frequency selective wireless environment is proposed and investigated in this paper. The optimal solution for the finite length MIMO decision feedback equalizer (DFE) with cancellation is derived and used to illustrate the potential of this architecture for space-time communications. LMS and RLS adaptive algorithms are also presented for the MIMO architecture. The convergence and performance of these algorithms is confirmed through simulation results. The proposed adaptive solutions do not require channel identification, are less computationally intensive than the optimal solution, and allow the proposed MIMO receiver to adapt to channel changes.