Resource allocation for an uplink cooperative OFDMA system is considered in this paper. Relays are simple mobile users with advantageous positions to relay other users with bad channel conditions. Having their own data to transmit to the Base Station (BS), the relays multiplex their own data to relayed data before transmitting to BS using Decode and Forward (DF) scheme. The resource allocation is formulated as an optimization problem to minimize the transmit system power while ensuring a target data rate per user. The considered features to optimize are relay selection, power and Resource Blocks (RB) allocation. Dual decomposition is used for resolution. Both half and full-duplex users cases are studied and compared to non-cooperative system. Simulation results show that our proposed algorithm reduces system's power consumption while ensuring required QoS.
['Salma Hamda', 'Mylene Pischella', 'Daniel Roviras', 'Ridha Bouallegue']
Energy Efficient Resource Allocation for Uplink OFDMA Cooperative System Using Multiplexing Half and Full-Duplex Mobile Relays