Adaptive resource allocation for multicast orthogonal frequency division multiple access systems with guaranteed BER and rate

Lin Bai, Chen Chen, Bo Wu, Jianhua He

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)912-926
Number of pages15
JournalInternational journal of communication systems
Volume26
Issue number7
DOIs
Publication statusPublished - Jul 2013

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Keywords

  • multicast OFDMA
  • resource allocation

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