Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)

The Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회)
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Adaptive Multiuser MIMO Transmission in Wireless Systems with Cooperating Cells

셀간 협력 통신 기반의 적응적 다중 사용자 다중 안테나 전송 기법

  • Lee, Jin-Hee (The School of Electrical Engineering, Korea University) ;
  • Ko, Young-Chai (The School of Electrical Engineering, Korea University)
  • 이진희 (고려대학교 전기전자공학과) ;
  • 고영채 (고려대학교 전기전자공학과)
  • Received : 2010.12.16
  • Accepted : 2011.01.14
  • Published : 2011.02.01
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Abstract

In multicell wireless systems with insufficient frequency reuse, user transmission will suffer other-cell interference (OCI). Cell cooperation is an effective way to mitigate OCI and increase the system sum rate. An adaptive scheme for serving one user in each cell was proposed in [1]. In this paper, we generalize that scheme by serving two users in each cell with adaptive zeroforcing beamforming (ZF) strategies. Based on our derived statistics of the signal-to-noise plus interference ratios, we choose the scheme to maximize the total ergodic sum-rate based on user locations. Through the numerical examples, we show that the total system sum rate can be improved by selecting appropriate transmitting strategy adaptively. As a result, our proposed system can explore spatial multiplexing gain without additional power and thus improves total system sum rate significantly.

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References

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