Hybrid subcarrier exclusivity and sharing scheme with optimized bit loading in uplink multi-cell OFDMA system

Hybrid subcarrier exclusivity and sharing (HSEnS) scheme with optimized bit loading in uplink multicell OFDMA system is proposed in this paper. Optimizing bit loading under subcarrier exclusivity (SE) and subcarrier sharing (SS) schemes in two adjacent cells is analyzed. Bit loading criteria and boundary setting procedures for convex optimizing bit loading under SS scheme are proposed. And bit loading boundaries for convex optimizing bit loading under SE and SS scheme can be obtained. The HSEnS scheme is proposed to combine the advantages of SE and SS schemes for making tradeoff between throughput performance and algorithm failure rate when interference is strong, moderate or weak. Simulations support our proposals and HSEnS with optimized bit loading outperforms other schemes.