Coordinated Beamforming Systems with Channel Prediction in Time-varying MIMO Broadcast Channel 


Vol. 36,  No. 5, pp. 302-308, May  2011


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  Abstract

In this paper we propose a coordinated beamforming(CBF) scheme considering the effects of feedback quantization and delay in time-varying multiple-input multiple-output(MIMO) broadcast channels. By equal power allocation per data stream, the proposed CBF scheme transmits multiple data streams per user terminals without additional feedback overhead when quantized feedback information is used. The proposed CBF scheme also applies a linear channel predictor to each user terminals to prevent errors due to feedback delays that are not evitable in practical wireless systems. Each user terminal utilizes Wiener filter to predict future channel responses and generates feedback information based on the predicted channels. Consequently the proposed CBF scheme adapting Wiener filter improves system performances compared with the conventional scheme using delayed feedback.

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  Cite this article

[IEEE Style]

J. Kim, J. W. Kang, S. Kim, "Coordinated Beamforming Systems with Channel Prediction in Time-varying MIMO Broadcast Channel," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 5, pp. 302-308, 2011. DOI: .

[ACM Style]

Jin Kim, Jin Whan Kang, and Sang-Hyo Kim. 2011. Coordinated Beamforming Systems with Channel Prediction in Time-varying MIMO Broadcast Channel. The Journal of Korean Institute of Communications and Information Sciences, 36, 5, (2011), 302-308. DOI: .

[KICS Style]

Jin Kim, Jin Whan Kang, Sang-Hyo Kim, "Coordinated Beamforming Systems with Channel Prediction in Time-varying MIMO Broadcast Channel," The Journal of Korean Institute of Communications and Information Sciences, vol. 36, no. 5, pp. 302-308, 5. 2011.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880