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A Subcarrier Allocation Algorithm for Efficiently Reducing Power in Multiuser OFDM Systems

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Abstract

Resource allocation in multiuser OFDM systems is a complex nonlinear optimization problem. In order to avoid direct solution, based on the analytical results of the problem of minimizing the total transmit power, a two-step subcarrier allocation algorithm is presented. The algorithm reduces the total transmit power by reducing the achievable minimum transmit power value required by each user. Subcarriers are allocated in the algorithm according to the data rate required by users and the channel characteristics. The required number of subcarriers allocated to users does not need to be known in advance. The allocation process consists of two steps: basic subcarrier allocation and residual subcarrier allocation. Numerical results demonstrate that the proposed algorithm can reduce the total transmit power effectively.

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Authors and Affiliations

  1. Dept. of Electronic Communications Technology, Shenzhen Institute of Information Technology, Shenzhen, China, 518029

    Handong Gong

  2. Dept. of Electronic Communications, South China University of Technology, Guangzhou, China, 510641

    Handong Gong, Wu Ye & Suili Feng

  3. Physics and Telecommunication Engineering, South China Normal University, Guangzhou, China, 510006

    Hui Song

Authors
  1. Handong Gong
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  2. Wu Ye
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  3. Suili Feng
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  4. Hui Song
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Corresponding author

Correspondence to Handong Gong.

Additional information

Handong Gong was born in 1974. He received the B.S. degree in auto control and the M.S. degree in physical electronic, and the Ph.D. degree in communication and information system from South China University of Technology in 1996, 2002 and 2006 respectively. He is now a lecturer in Shenzhen Institute of Information Technology. His main research interest include OFDM signal process, linearization technique for amplifier and mobile communication technologies.

Wu Ye was born in 1938. Now he is a professor and Ph. D. advisor at South China University of Technology. His research interests include queuing theory and its application in communication networks, mobile communication technologies and video process.

Suili Feng was born in 1955. Now he is a professor and doctor supervisor at South China University of Technology. His research interests include theory and technology of communication network, key technologies of mobile communication and embedded system.

Hui Song was born in 1980. She received doctor’s degree from South China University of Technology in communication and information system in 2005. Now she is a lecturer in South China Normal University. Her research interests include signal process, flow control and optimization.

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Gong, H., Ye, W., Feng, S. et al. A Subcarrier Allocation Algorithm for Efficiently Reducing Power in Multiuser OFDM Systems. Wireless Pers Commun 40, 233–243 (2007). https://doi.org/10.1007/s11277-006-9112-z

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  • DOI: https://doi.org/10.1007/s11277-006-9112-z

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