Performance Studies of a Multi-band Multicarrier CDMA System with a Simplified Receiver Structure Using Despreader before Equalizer

摘要

This paper proposes a multi-band multicarrier CDMA system with a simplified receiver structure for downlink transmission. An adaptive algorithm is proposed for allocating multiple sub-bands for users based on their channel gain and usage. The band allocation algorithm together with adaptive modulation can considerably increase the system capacity. A simplified receiver structure intended to reduce the complexity of channel equalizer-despreader structure of conventional multicarrier CDMA system is also proposed. The combined system is extensively simulated for different channel parameters and the results are discussed.