Optimal Resource Allocation in OFDMA-Based Decode-and-Forward Relaying Systems

doi:10.13190/jbupt.201001.12.217

JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM ›› 2010, Vol. 33 ›› Issue (1): 12-17.doi: 10.13190/jbupt.201001.12.217

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Optimal Resource Allocation in OFDMA-Based Decode-and-Forward Relaying Systems

CHEN Kai1；ZHANG Bi-ling2；LIU Dan-pu1；YUE Guang-xin1

（1.School of Information and Communication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China; 2.School of Network Education, Beijing University of Posts and Telecommunications, Beijing 100088, China）

Received:2009-04-24 Revised:2009-07-14 Online:2010-02-28 Published:2010-02-28
Contact: CHEN Kai

Abstract

Abstract:

The problems of the joint subcarrier allocation, power allocation, transmission mode selection and relay selection optimization which maximizes the weighted sum rate are addressed in orthogonal frequency division multiple access-based decode-and-forward(OFDMA-DF) relaying systems. Based on convex optimization theory, an optimal resource allocation algorithm is proposed. The complexity of this algorithm is only linear in the number of subcarriers. Simulation demonstrates that the scheme can achievenot only fair resource allocation but also effective relay utilization that enhances the system capacity through adjusting weighting factors for each user.

Key words: orthogonal frequency division multiple access, relaying system, decode-and-forward, optimal resource allocation, convex optimization

CLC Number:

TN911.22

CHEN Kai1；ZHANG Bi-ling2；LIU Dan-pu1；YUE Guang-xin1. Optimal Resource Allocation in OFDMA-Based Decode-and-Forward Relaying Systems[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2010, 33(1): 12-17.

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Optimal Resource Allocation in OFDMA-Based Decode-and-Forward Relaying Systems

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