LTE 기반 MU-MIMO 시스템에 구현한 빔포밍 알고리즘
Implementation of a beamforming for LTE-based MU-MIMO system
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초록
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.
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.
참고문헌 (6)
- Andrea Goldsmith, "Capacity Limits of MIMO Channels", IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS, 21(5), pp.684~702 (2003)
- 채찬병, "Shifting the MIMO paradigm", IEEE SIGNAL PROCESSING MAGAZINE, 24(5), pp.36~46
- Seungwon Choi, "A novel adaptive beamforming algorithm for a smart antenna system in a CDMA mobile communication environment", IEEE Transations on Vehicular Technology, 49, pp.1793~1806 (2000)
- Raghuraman Mudumbai, "Distributed Transmit Beamforming: Challenges and Recent Progress", IEEE Communication Magazine, 47, pp.102~110 (2009)
- 현승헌, "Novel automatic calibration technique for smart antenna systems", DIGITAL SIGNAL PROCESSING, 19, pp.14~21, ACADEMIC PRESS INC ELSEVIER SCIENCE
- 이원철, "Essential considerations in implementing the smart antenna system for downlink beamforming", WIRELESS PERSONAL COMMUNICATIONS, 35, pp.227~240, SPRINGER