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| Distortion-guaranteed Energy Saving Power Allocation for Downlink OFDMA Multiuser Video Transmission |
| Wenmin Ma, Wei Zheng, Haijun Zhang, Xiangming Wen, Zhaoming Lu |
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Abstract In this paper, a Distortion-guaranteed Energy Saving (D{\_}GES)
power allocation scheme is proposed for multiuser video
transmission. The multiuser downlink Orthogonal Frequency-division
Multiple-access (OFDMA) system is adopted and the video streaming
distortion model is developed based on power-rate-distortion (P-R-D)
optimization. We design a power allocation scheme which not only
aims to utilize transmission energy but also guarantees the
distortion requirements for video streaming. Furthermore, the
Constrained Particle Swarm Optimization (CPSO) is used to solve the
target problem. Comparing with the traditional power allocation
policy, simulations results show that the proposed algorithm not
only saves the system energy significantly but also guarantees the
video streaming quality.
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