Constant Power Allocation Methods for SC-FDMA Systems

Wei-Cheng PAO  Yung-Fang CHEN  Dah-Chung CHANG  

IEICE TRANSACTIONS on Communications   Vol.E93-B   No.3   pp.771-775
Publication Date: 2010/03/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E93.B.771
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
SC-FDMA,  spectral efficiency,  power allocation,  waterfilling methods,  

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A simple suboptimal power allocation method is proposed for SC-FDMA systems. It is known that the performance of constant power-based allocation methods is close to that of optimal solutions. In this letter, by utilizing the waterfilling condition inequality derived for SC-FDMA systems, a threshold is set to select subcarriers for loading constant power to these selected subcarriers. It offers competitive performance as confirmed by the simulation results.