Performance evaluation of approximately MAI-free multiaccess OFDM transceiver

The performance of an approximately MAI-free OFDM transceiver, called the repetitively coded multicarrier CDMA (RCMC-CDMA), is evaluated and compared with MC-CDMA in this work. In particular, its advantages, on the MAI reduction capability and the low implementational complexity are presented. We first demonstrate that RCMC-CDMA has the performance comparable to MC-CDMA using a linear MUD (multiuser detection) MMSE (minimum mean squared errors) detector, while it outperforms MC-CDMA with a MUD decorrelating detector. Then, the complexity of RCMC-CDMA is shown to be lower than that of MUD-based MC-CDMA.