Efficient subcarrier and power allocation algorithm in OFDMA uplink system

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This letter focuses on uplink transmission in OFDMA systems. A subcarrier and power allocation problem is formulated that maximizes the throughput of OFDMA uplink systems while satisfying each user's power constraints. A greedy algorithm known to be the most efficient algorithm for this problem can provide a high quality near-optimal solution, but has the disadvantage of incurring a long computation time. As this problem should be solved in a real-time environment, computation time is a very important performance measure of algorithms. In this letter, a computationally efficient algorithm that provides a nearly identical quality, near-optimal solution as the greedy algorithm but requires less than 10% of the computation time of the greedy algorithm is proposed.
Publisher
IEICE-INST ELECTRONICS INFORMATION COMMUNICATIONS ENG
Issue Date
2007-02
Language
ENG
Article Type
Article
Keywords

MULTIUSER OFDM

Citation

IEICE TRANSACTIONS ON COMMUNICATIONS, v.E90B, pp.368 - 371

ISSN
0916-8516
DOI
10.1093/ietcom/e90-b.2.368
URI
http://hdl.handle.net/10203/1866
Appears in Collection
IE-Journal Papers(저널논문)

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