Antenna Selection in Space Time Block Coded MC-CDMA Systems

Antenna selection (AS) is herein applied to space-time block coded (STBC) multi-carrier code division multiple access (MC-CDMA) system to improve the downlink system performance while reducing system cost, by choosing a subset of antennas from all available ones. Optimal antenna subset is obtained at the receiver with channel state information (CSI) estimated, and then fed back through a low bit rate, zero-delay and error-free path. The STBC scheme is applied to the system with antennas selected from available. The system structure of the transmitter and the receiver is illustrated. The downlink performance of such a system in frequency selective, spatially independent and correlated fading channels is analyzed. Some representative simulations are taken to validate the analysis