Distortion Minimization for Relay Assisted Wireless Multicast

다국어 초록 (Multilingual Abstract)

The paper studies the scenario of wireless multicast witha single transmitter and a relay that deliver scalable source symbolsto the receivers in a decode-and-forward (DF) fashion. Withthe end-to-end mean square error distortion (EED) as performancemetric, we firstly derive the EED expression for the L-resolutionscalable source symbol for any receiver. An optimization problemin minimizing the weighted EED is then formulated for finding thepower allocations for all resolution layers at the transmitter andthe relay. Due to nonlinearity of the formulations, we solve the formulatedoptimization problems using a generalized programmingalgorithm for obtaining good sub-optimal solutions. Case studiesare conducted to verify the proposed formulations and solution approaches.
The results demonstrate the advantages of the proposedstrategies in the relay-assisted wireless networks for scalable sourcemulticast.

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