An Efficient Channel Feedback Method for Zeroforcing Beamforming Based Multi-User Multiple-Input Multiple-Output System 


Vol. 34,  No. 9, pp. 673-678, Sep.  2009


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  Abstract

This paper presents a feedback method for improving the system capacity of MU-MIMO system for downlink channel environments. In a typical conventional feedback method, CVQ, in order to enhance the channel capacity, not only the feedback load is increased but also the quantization of the channel vector is increased, because the channel parameter of each user has to be fed back after quantizing one of the pre-defined N-codebook vectors. In this paper, a novel feedback method is proposed which provides an improved system capacity by transferring the channel state information without increasing the feedback load. Performance of the proposed method is compared to the conventional CVQ method through computer simulations. The simulation results show that the proposed method with 3-bit feedback provides a system capacity comparable to the CVQ method of 6-bit feedback when the number of transmit antennas is 2.

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  Cite this article

[IEEE Style]

T. Oh, S. Ahn, S. Choi, "An Efficient Channel Feedback Method for Zeroforcing Beamforming Based Multi-User Multiple-Input Multiple-Output System," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 9, pp. 673-678, 2009. DOI: .

[ACM Style]

Tae-youl Oh, Sung-soo Ahn, and Seungwon Choi. 2009. An Efficient Channel Feedback Method for Zeroforcing Beamforming Based Multi-User Multiple-Input Multiple-Output System. The Journal of Korean Institute of Communications and Information Sciences, 34, 9, (2009), 673-678. DOI: .

[KICS Style]

Tae-youl Oh, Sung-soo Ahn, Seungwon Choi, "An Efficient Channel Feedback Method for Zeroforcing Beamforming Based Multi-User Multiple-Input Multiple-Output System," The Journal of Korean Institute of Communications and Information Sciences, vol. 34, no. 9, pp. 673-678, 9. 2009.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880