MIMO Transceiver Combining Space-Frequency Spreading and Block-Coding

Signal processing solutions based on the use of multiple transmit and receive antennas date back to over a decade. Wireless communication systems employing multiple antennas at both ends of the link, commonly known as Multiple-Input Multiple-Output (MIMO) systems, are being considered as one of the key technologies to be deployed in current and upcoming wireless communications standards. On the other hand, combinations of Orthogonal Frequency Division Multiplexing (OFDM) and Code Division Multiple Access (CDMA) technologies have been proposed in a number of different works. Multi-Carrier (MC)-CDMA performs spreading of the information symbols across the different subcarriers but suffers from limited frequency diversity gains like conventional CDMA.