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Block adaptive subcarrier allocation for wireless multiuser OFDM system

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Journal of Electronics

Abstract

In this paper, a blockwise adaptive subcarrier allocation algorithm for multiuser Orthogonal Frequency Division Multiplexing (OFDM) system is introduced. Assuming the knowledge of channel information for all users, the algorithm minimizes the total transmit power while satisfying the total power and users’ rate constraints. The result of simulation shows that the proposed algorithm reduces the average bit Signal-to-Noise Ratio (SNR) by approximately 4 dB compared with OFDM-Frequency Division Multiple Access (OFDM-FDMA), and supports more users in a multiuser Rayleigh fading channel. As assigning subcarriers in block, the computational complexity of the algorithm is much lower than that of the derivation of “water-filling” algorithm.

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Authors and Affiliations

  1. PCN&SS Lab, Dept of Electronics Engineering and Information Science, University of Science and Technology of China, 230027, Hefei

    Liang Xiaowen & Zhu Jinkang

Authors
  1. Liang Xiaowen
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  2. Zhu Jinkang
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Additional information

Supported by the National 863 High-Tech Program of China (No.2001AA121031) and the National Natural Science Foundation of China (GG065760242003)

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Liang, X., Zhu, J. Block adaptive subcarrier allocation for wireless multiuser OFDM system. J. of Electron.(China) 21, 454–460 (2004). https://doi.org/10.1007/BF03036996

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  • DOI: https://doi.org/10.1007/BF03036996

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