Genetic Algorithm Approach for Resource Allocation in Multi-User OFDM Systems

Abstract

A novel genetic algorithm application is proposed for adaptive power and subcarrier allocation in multi-user OFDM systems. The proposed method is compared with Eshan's [Ehsan Bakhtiari and Babak H. Khalaj, "A new Joint Power and Subcarrier Allocation Scheme for Multiuser OFDM Systems", 14th IEEE Proceedings on Personal, Indoor and Mobile Radio Communications, Beijing, China, Vol. 2, PP 1959 -1963, Sept 7 -10, 2003.] power and subcarrier allocation algorithm and Wang's modified genetic algorithm [Yongxue Wang et al.,"Adaptive Subcarrier and Bit Allocation for Multiuser OFDM System Based on Genetic Algorithm", IEEE 2005.]. Our method has fast convergence and can handle large allocations of subcarriers to users without performance degradation. The simulation results show that our approach is a viable alternative to existing methods for optimum resource allocation.