Dynamic Resource Assignment for MC-CDMA with prioritization and QoS constraint

In this paper, we present a dynamic method for resource assignment by implementing a cross-layer design for Multi-Carrier Code Division Multiple Access (MC-CDMA) systems that adapts user allocation to channel fluctuations. Our approach consists of prioritizing users according to their class of service (CoS), assigning them to the best subchannels based on channel estimates, and allowing redundancy of assignment in case of strong degradation of otherspsila signals. This improves upon the performance of the existing methods by allowing adaptation to the system parameters. This technique has been implemented in software and validated experimentally, bringing about 6 dB gain for a bit error rate (BER) of 10-3 in a multipath fading environment with 16 users for 8 available codes, compared to the classic round robin (RR) assignment.