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Linear Water-Filling Power Allocation Algorithm in OFDMA System |
Zhang Dong-mei①; Xu You-yun①②; Cai Yue-ming① |
①Institute of Communications Engineering, PLA Univ. of Sci. & Tech., Nanjing 210007, China; ②Institute of Electronic Engineering, Shanghai JiaoTong University, Shanghai 200030, China |
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Abstract Power allocation is an important issue of resource scheduling in OFDMA system. In this paper, an algorithm of linear water-filling power allocation is proposed through searching for a rapid means for confirming the sub-carriers which need not allocate power. It can finish the process of power water-filling without time after time iterative calculation. The simulation results show that the throughput of the proposed algorithm approaches the algorithm of iterated water-filling power allocation.
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Received: 24 October 2005
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