The Capacity of Downlink Multiuser OFDM with Quality Based CSI Feedback
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概要
- 論文の詳細を見る
The capacity of multiuser OFDM systems can be maximized by allocating resources (subcarrier and power) to the user with the highest instantaneous channel gain. This assumes complete channel state information (CSI) at the transmitter, which is achieved by every user reporting its CSI for all subcarriers to the transmitter via feedback channel. In practice, due to the limited capacity of the feedback channel, the completeness of CSI may be severely restricted especially with a large number of users transmitting a large amount of feedback information. In order to reduce the amount of feedback information while preserving the maximal capacity, quality based CSI feedback (QCF) is proposed in this letter. The system capacity is derived with QCF and compared with that of full CSI feedback. The results show that QCF successfully reduces the amount of feedback information with little capacity loss.
- （社）電子情報通信学会の論文
- 2009-04-01
著者
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KIM Dongwoo
Department of Electrical Engineering and Computer Science, Hanyang University
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KIM Sehun
Department of Industrial Engineering, Korea Advanced Institute of Science and Technology
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Kim Sehun
Department Of Industrial Engineering Korea Advanced Institute Of Science And Technology
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Kim Dongwoo
Department Of Electrical Engineering And Computer Science Hanyang University
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KIM Jongin
Department of Industrial Engineering, Korea Advanced Institute of Science and Technology
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Kim Jongin
Department Of Industrial Engineering Korea Advanced Institute Of Science And Technology
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Kim Dongwoo
Department of Applied Physics, Korea University, Seoul 136-713, Korea
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Kim Sehun
Department of Chemistry, Korea Advanced Institute of Science and Technology, Daejeon 305-701, Korea
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