Space division multiplexing (SDM) for OFDM systems

A promising solution for significant increase of the bandwidth efficiency and transmission capacity is the exploitation of the spatial dimension, by using space division multiplexing (SDM). SDM algorithms exploit the richly scattered (indoor) wireless channel by using multiple transmit and receive antennas. A new SDM technique, called maximum likelihood decoding (MLD) is proposed. The superior SNR performance of MLD compared to other SDM techniques is proven. To obtain an even higher bit rate and make the system more robust against intersymbol interference, (single-carrier) SDM is successfully applied to the spectrum efficient multi-carrier transmission technique orthogonal frequency division multiplexing (OFDM).