The combination of relay transmission with orthogonal frequency division multiplexing (OFDM) technique is deemed as the candidate for the fourth generation (4G)

In wireless systems, resource allocation is still an important challenge to satisfy user requirements and to ensure good system performances with always greedy

Next generation wireless communication networks are expected to provide ubiquitous high data rate coverage and support heterogeneous wireless services with dive

Driven by the significant consumer demand for reliable and high data rate communications, the future-generation cellular systems are expected to employ cutting-