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Cooperative Subcarrier Allocation and Power Allocation in the Downlink of an Amplify-and-Forward OFDM Relaying System

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Abstract

The increasing use of relays in wireless communication systems is a driving force to explore innovative techniques that can improve the quality of service as well as enhance the coverage in wireless systems. In this article, we propose a two-step approach for subcarrier allocation and power allocation in the downlink of an OFDM-based amplify-and forward relaying system. In the first step, the total power is allocated to mobile users and relays based on the optimum power ratio derived for the single-relay system. In the second step, subcarriers are assigned to the users based on cooperative subcarrier allocation algorithms. Compared to the non-cooperative algorithm with flat power allocation, the total throughput is shown to improve by applying the two-step cooperative subcarrier allocation and power allocation algorithms.

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Authors and Affiliations

  1. Electrical Engineering, Ryerson University, Toronto, Canada

    H. Rasouli & A. Anpalagan

  2. Ulsan University, Ulsan, South Korea

    H. Y. Kong

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  1. H. Rasouli
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  2. H. Y. Kong
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  3. A. Anpalagan
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Correspondence to A. Anpalagan.

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Rasouli, H., Kong, H.Y. & Anpalagan, A. Cooperative Subcarrier Allocation and Power Allocation in the Downlink of an Amplify-and-Forward OFDM Relaying System. Wireless Pers Commun 79, 2271–2290 (2014). https://doi.org/10.1007/s11277-014-1984-8

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  • DOI: https://doi.org/10.1007/s11277-014-1984-8

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