Abstract
Resource allocation for orthogonal frequency-division multiple access (OFDMA) systems is a challenging issue for next-generation wireless communications. In OFDMA systems, adaptive resource allocations can considerably improve the system performance [1]. Previous research works mainly focused on OFDMA systems for unicast transmissions, wherein each subcarrier is assigned to one user exclusively [1–4]. However, many emerging wireless applications, such as mobile TV and video conference, take the form of multicast transmissions.
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