A robust transmit diversity for OFDM systems in spatially correlated Rayleigh fading channels

We propose a robust transmit diversity technique for OFDM systems in spatially correlated Rayleigh fading channels. Using the frequency-domain correlation properties of the channel frequency response in OFDM systems and exploiting the effect of frequency diversity, the proposed scheme is more robust against spatial correlation than STBC-OFDM using 𝒢₈₄ code. Simulation results confirm that the proposed scheme improves BEP performance more than STBC-OFDM using 𝒢₈₄ code when spatial correlation increases.