Parallel Interference Canceller with Adaptive MMSE Equalization for MIMO-OFDM Transmission

The combination of multiple-input multiple-output (MIMO) signal processing with orthogonal frequency division multiplexing (OFDM) using Cyclic Prefix (CP) is regarded as a highly promising solution to achieving the data rates of next-generation wireless communication systems operating in frequency selective fading environments. In this paper, we propose a novel detection scheme for MIMO based transmission that combines the adaptive MMSE [1] detection scheme with a priori information and parallel interference cancellation (PIC) in the spatial domain. Simulation results show interesting gain in term of BER performance and also in term of complexity because the BER performance can be adapted in function of the number of iteration that we set-up for the adaptive MMSE detection. Simulation results show interesting gain in term of performance and also in term of complexity because the BER performance can be adapted in function of the number of iteration that we set-up for the adaptive MMSE detection. KeywordsOFDM, MIMO, Lagrangian method, global BER optimization.