The Capacity of Downlink Multiuser OFDM with Quality Based CSI Feedback
Summary :
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.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E92-B No.4 pp.1252-1257
- Publication Date
- 2009/04/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E92.B.1252
- Type of Manuscript
- PAPER
- Category
- Wireless Communication Technologies
Authors
Keyword
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Jongin KIM, Dongwoo KIM, Sehun KIM, "The Capacity of Downlink Multiuser OFDM with Quality Based CSI Feedback" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 4, pp. 1252-1257, April 2009, doi: 10.1587/transcom.E92.B.1252.
Abstract: 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.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.1252/_p
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@ARTICLE{e92-b_4_1252,
author={Jongin KIM, Dongwoo KIM, Sehun KIM, },
journal={IEICE TRANSACTIONS on Communications},
title={The Capacity of Downlink Multiuser OFDM with Quality Based CSI Feedback},
year={2009},
volume={E92-B},
number={4},
pages={1252-1257},
abstract={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.},
keywords={},
doi={10.1587/transcom.E92.B.1252},
ISSN={1745-1345},
month={April},}
Copy
TY - JOUR
TI - The Capacity of Downlink Multiuser OFDM with Quality Based CSI Feedback
T2 - IEICE TRANSACTIONS on Communications
SP - 1252
EP - 1257
AU - Jongin KIM
AU - Dongwoo KIM
AU - Sehun KIM
PY - 2009
DO - 10.1587/transcom.E92.B.1252
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2009
AB - 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.
ER -
English
