ETRI Journal

  • 제38권3호
  • /
  • Pages.435-443
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  • 2016
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  • 1225-6463(pISSN)
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  • 2233-7326(eISSN)
한국전자통신연구원 (Electronics and Telecommunications Research Institute)
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Regularized Zero-Forcing Beam Design under Time-Varying Channels

  • Yu, Heejung (Department of Information and Communication Engineering, Yeungnam University) ;
  • Kim, Taejoon (School of Information and Communication Engineering, Chungbuk National University)
  • 투고 : 2015.08.20
  • 심사 : 2016.01.25
  • 발행 : 2016.06.01
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초록

In this paper, an efficient beam tracking algorithm for a regularized zero-forcing (RZF) approach in slowly fading multiple-input and single-output (MISO) broadcast channels is considered. By modifying an RZF equation, an RZF beam tracking algorithm is proposed using matrix perturbation theory. The proposed algorithm utilizes both beams from the previous time step and channel difference (between the previous and current time steps) to calculate the RZF beams. The tracking performance of the proposed algorithm is analyzed in terms of the mean square error (MSE) between a tracking approach and an exact recomputing approach, and in terms of the additional MSE caused by the beam tracking error at the receiver. Numerical results show that the proposed algorithm has almost the same performance as the exact recomputing approach in terms of the sum rate.

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참고문헌

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