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Adaptive resource allocation for multicast orthogonal frequency division multiple access systems with guaranteed BER and rate
Author(s) -
Bai Lin,
Chen Chen,
Wu Bo,
He Jianhua
Publication year - 2013
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.1377
Subject(s) - computer science , multicast , orthogonal frequency division multiple access , transmission (telecommunications) , resource allocation , bit error rate , orthogonal frequency division multiplexing , transmitter power output , algorithm , scheme (mathematics) , frequency division multiple access , mathematical optimization , computer network , transmitter , telecommunications , mathematics , channel (broadcasting) , mathematical analysis , decoding methods
SUMMARY In this paper, we propose a resource allocation scheme to minimize transmit power for multicast orthogonal frequency division multiple access systems. The proposed scheme allows users to have different symbol error rate (SER) across subcarriers and guarantees an average bit error rate and transmission rate for all users. We first provide an algorithm to determine the optimal bits and target SER on subcarriers. Because the worst‐case complexity of the optimal algorithm is exponential, we further propose a suboptimal algorithm that separately assigns bit and adjusts SER with a lower complexity. Numerical results show that the proposed algorithm can effectively improve the performance of multicast orthogonal frequency division multiple access systems and that the performance of the suboptimal algorithm is close to that of the optimal one. Copyright © 2012 John Wiley & Sons, Ltd.