Multi-antenna Subcarrier Allocation Using Zero-Forcing Beamforming in MIMO-OFDM Systems 


Vol. 32,  No. 10, pp. 974-983, Oct.  2007


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  Abstract

In this paper, a low complexity subcarrier allocation scheme is proposed for multiuser MIMO-OFDM systems with zero-forcing beamformer (ZFBF) so that the total transmit power can be minimized satisfying given target data rate. Since the optimal method requires very high computational complexity, we propose a low complextiy suboptimal method. Using the fact that the effective channel gain is proportional to the orthogonallity of channels of multiplexed users, a user set with the highest orthogonality of channel among users is assigned to each subcarrier in order to minimize required transmit power. The numerical results show that the proposed suboptimal method can reduce computational complexity with little performance loss.

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  Cite this article

[IEEE Style]

Y. Shin, T. Kang, H. Kim, "Multi-antenna Subcarrier Allocation Using Zero-Forcing Beamforming in MIMO-OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 10, pp. 974-983, 2007. DOI: .

[ACM Style]

Young-il Shin, Tae-Sung Kang, and Hyung-Myung Kim. 2007. Multi-antenna Subcarrier Allocation Using Zero-Forcing Beamforming in MIMO-OFDM Systems. The Journal of Korean Institute of Communications and Information Sciences, 32, 10, (2007), 974-983. DOI: .

[KICS Style]

Young-il Shin, Tae-Sung Kang, Hyung-Myung Kim, "Multi-antenna Subcarrier Allocation Using Zero-Forcing Beamforming in MIMO-OFDM Systems," The Journal of Korean Institute of Communications and Information Sciences, vol. 32, no. 10, pp. 974-983, 10. 2007.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880