Performance evaluation of decoding algorithms for multi-layered STBC-OFDM systems

In this paper, we study and compare the performance of several detection algorithms for high data rate OFDM based systems, such as WLANs. The proposed architecture combines transmit diversity and spatial multiplexing. The single user's data are demultiplexed into layers of information and each layer is encoded independently by a space time block coder. The output is OFDM modulated and transmitted over multiple transmit antennas. At the receiver, after OFDM demodulation, group nulling/ interference cancellation and joint maximum likelihood detection algorithms are employed to detect the transmitted symbols. The performance and tradeoff of the algorithms are compared and evaluated.