Channel-Adaptive Optimal OFDMA Scheduling

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Channel-Adaptive Optimal OFDMA Scheduling
Abstract-Joint subcarrier, power and rate allocation in orthogonal frequency division multiple access (OFDMA) scheduling is investigated for both downlink and uplink wireless transmissions. Using a time-sharing argument, a convex formulation is obtained avoiding the NP-hardness of the usual 0-1 integer program solution. It is rigourously established that the optimal allocation can be obtained almost surely through a greedy waterfilling approach with linear complexity in the number of users and subcarriers. Stochastic approximation is further employed to develop on-line algorithms which are capable of dynamically learning the underlying channel distribution and asymptotically converges to the off-line optimal solution from arbitrary initial values.
Xin Wang, Georgios B. Giannakis, Yingqun Yu
Added 14 Aug 2010
Updated 14 Aug 2010
Type Conference
Year 2007
Where CISS
Authors Xin Wang, Georgios B. Giannakis, Yingqun Yu
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