Abstract
Multicarrier code division multiple access (MC-CDMA) is a multiple access scheme that combines CDMA and orthogonal frequency division multiplexing (OFDM) techniques. One major problem associated with MC-CDMA is that the intercarrier interference (ICI) caused by the frequency offset may significantly degrade the system performance. In this thesis, we propose a new spreading code which has ICI self-cancellation capability for MC-CDMA systems. Besides, we also construct a multiple-antenna MC-CDMA system in which the proposed spreading code and Alamouti’s space time block code are both utilized. In downlink transmission, several detection techniques simulation result shows that the proposed spreading code can achieve high CIR and well BER performance and offer excellent immunity to interference.