A multicarrier-CDMA receiver with full interference suppression and carrier frequency offset recovery

A low-complexity multicarrier-CDMA space-time receiver with full interference suppression capabilities is developed and analyzed for high-rate transmissions over next-generation CDMA systems. First, we derive a complete model of the interference which takes into account MAI, ISI, and ICI. Based on this model, we introduce a new multicarrier interference subspace rejection (MC-ISR) receiver and analyze its performance in an unknown time-varying Rayleigh channel with multipath, carrier offset and cross-correlation between subcarrier channels. We also propose a realistic implementation of this receiver which includes an efficient strategy for carrier offset recovery in a multicarrier and multiuser detection scheme. Simulation results confirm the net advantage of the full interference suppression capabilities of MC-ISR.