International Journal of Engineering and Technology

Proficient allocation of resources like bandwidth, bit and power to the users is essential due to the inadequate resources available at the base station. A novel technique for scheduling and resource allocation in multiuser OFDM system is proposed here. For scheduling, switched based scheduling and on/off based scheduling techniques are used to schedule the users. The quality users based on threshold SNR from the scheduler are optimized in the PSO-GA optimizer. In the optimizer the subcarrier and power allocation are carried out suboptimally. The adaptive resource allocation is considered for three scenarios such as multiuser unicast service, multiuser multicast services at low and constant rate and multiuser multicast services at high rate. Simulation results show that the combination of PSO and GA with scheduling yields better results than normal PSO and considerable reduction in BER and improvement in average spectral efficiency.