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- W2160173487 abstract "In this paper, we propose sub-carrier allocation algorithms for a multiple access scheme in downlink OFDM transmission. Knowing the channel characteristics of all the users at the base station, the sub-carrier allocation algorithm assigns sub-carriers to the users in a way that the total transmit power is minimized. An optimal algorithm is presented to provide the best sub-carrier assignment. The complexity of the optimal solution renders it impractical for real-time application. To deal with the frequently changing channel characteristic of a fast time-varying multipath fading channel, a heuristic algorithm based on constructive assignment and iterative improvement is proposed which can give out a valid solution in real time. Experimental results show that the performance of this real-time algorithm is close to that of the optimal allocation." @default.
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- W2160173487 date "2005-08-25" @default.
- W2160173487 modified "2023-09-23" @default.
- W2160173487 title "A real-time sub-carrier allocation scheme for multiple access downlink OFDM transmission" @default.
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- W2160173487 doi "https://doi.org/10.1109/vetecf.1999.798611" @default.
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