Evaluation of Space-Time-Frequency (STF)-coded MIMO-OFDM Systems in Realistic Channel Models

Abstract—By taking into account several dimen-sion of the transmitted signal, such as space, fre-quency, period and time, MIMO-OFDM systems al-low an increased spectral efficiency and an improved identifiability in comparison to matrix solutions. In this paper, we evaluate MIMO-OFDM systems for geometric scenarios where the narrow band approx-imation is violated. To this end a new data model is proposed to better represent the behavior of the system in the presence of wide band signals. More-over, we also relax the assumption that the amount of transmitted antennas is equal to the number of transmitted symbols. I