Feedback Reduction of Channel Quality Information for Multiuser MIMO Systems 


Vol. 31,  No. 8, pp. 798-803, Aug.  2006


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  Abstract

An opportunistic scheduling is adopted to improve the capacity of the system by exploiting the multiuser diversity of multiuser MIMO(MU-MIMO) systems. However it requires the large amount of feedback carrying the channel quality information(CQI) of each user to the transmitter. The considered per user unitary and rate control(PU2RC) needs to feedback the preferred precoding index and its CQIs, and it has a defect in scheduling the streams for the grouped user. In order to overcome these drawbacks, a novel feedback reduction scheme is proposed in this paper. It employs transmitter controlled precoding and opportunistic feedback(TCP-OFB). The simulation results demonstrate that TCP-OFB shows comparable performance to PU2RC while it only requires far reduced feedback load.

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  Cite this article

[IEEE Style]

M. Cho, Y. Kim, D. Hong, "Feedback Reduction of Channel Quality Information for Multiuser MIMO Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 8, pp. 798-803, 2006. DOI: .

[ACM Style]

Myeon-gyun Cho, Youngju Kim, and Daesik Hong. 2006. Feedback Reduction of Channel Quality Information for Multiuser MIMO Systems. The Journal of Korean Institute of Communications and Information Sciences, 31, 8, (2006), 798-803. DOI: .

[KICS Style]

Myeon-gyun Cho, Youngju Kim, Daesik Hong, "Feedback Reduction of Channel Quality Information for Multiuser MIMO Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 8, pp. 798-803, 8. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880