Journal of Korea Society of Digital Industry and Information Management (디지털산업정보학회논문지)

Korea Society of Digital Industry and Information Management (디지털산업정보학회)
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Implementation of a beamforming for LTE-based MU-MIMO system

LTE 기반 MU-MIMO 시스템에 구현한 빔포밍 알고리즘

  • 한연규 (한양대학교 전자컴퓨터통신공학부, 현대자동차) ;
  • 양현욱 (한양대학교 전자컴퓨터통신공학부) ;
  • 김경훈 (한양대학교 전자컴퓨터통신공학부) ;
  • 최승원 (한양대학교 전자컴퓨터통신공학부)
  • Published : 2012.12.30
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Abstract

In this paper, we propose a new beamforming method which is used in Multiple User-Multiple Input Multiple Output (MU-MIMO) system. An experimental system consists of LTE based TDD base-station which has 2 MIMO elements each of which contains 10-array antennas and 2 mobile terminals each of which has a single antenna. We demonstrate that the Multiple Access Interference can further be reduced by appending a beamforming procedure in MU-MIMO system in which various users share a given channel resource. The proposed algorithm is the ordinary Lagrange beamforming algorithm combined with Zero-Forcing. It is demonstrated that the proposed beamforming method outperforms a conventional method which is the ZF at least by 8dB in terms of SNR through computer simulations. From experimental tests, we verify the feasibility of the proposed beamforming algorithm for realizing a practical LTE based TDD base-station for utilizing channel resources more efficiently.

Keywords

References

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