Resource allocation and relay selection for cooperative OFDMA networks with imperfect channel information

Jiun Hung Wang*, Yuan Bin Lin, Yu-Ted Su

*Corresponding author for this work

研究成果: Conference contribution同行評審

7 引文 斯高帕斯(Scopus)

摘要

We consider the problem of resource allocation and relay selection in an Orthogonal Frequency Division Multiple Access (OFDMA) based downlink network. We assume the availability of multiple cooperative relay stations but not the perfect channel state information (CSI). Instead, the base station knows only the estimated channel gain and the associated error distribution. Using a tight capacity lower bound (CLB) as the performance metric, we derive the optimal source and relay power allocation ratio that maximizes the CLB of a cascaded source-relay-destination link. Based on this power ratio, we propose a simple suboptimal algorithm that assigns power, subcarriers and cooperative relays to each mobile station. Simulation results show that our algorithm not only meets the users' rate constraints with very high probabilities but yields an excellent sum rate (CLB) performance.

原文English
主出版物標題2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2011
頁面286-290
頁數5
DOIs
出版狀態Published - 16 九月 2011
事件2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2011 - San Francisco, CA, United States
持續時間: 26 六月 201129 六月 2011

出版系列

名字IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC

Conference

Conference2011 IEEE 12th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2011
國家United States
城市San Francisco, CA
期間26/06/1129/06/11

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