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Uplink scheduling is compared between OFDMA and SCFDMA systems. Two low complexity scheduling algorithms are presented. Both algorithms perform utility maximization scheduling, with the second having the property of ensuring that all subcarriers allocated to a single user are consecutive. Furthermore, the case of independent fading over the subcarriers of a single resource block is compared to the...
Opportunistic beamforming is investigated in OFDMA uplink. A low complexity scheduling algorithm for utility maximization with opportunistic beamforming is presented. Scheduling with greedy and proportional fair utilities is studied. A beam is formed in a pseudorandom fashion thus leading to artificial fading variations. This allows users to opportunistically benefit from the antenna gain. Results...
Uplink ergodic sum-rate maximization in OFDMA systems is considered. The general problem is formulated as a convex optimization problem and a dual solution is presented. The problem formulation is generalized to the case of utility maximization where the utility can be any function of rate. A suboptimal scheduling algorithm with low complexity is proposed and shown to achieve close performance to...
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