S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Electrical and Computer Engineering (전기·정보공학부) Journal Papers (저널논문_전기·정보공학부)
Coherent opportunistic beamforming with partial channel information in multiuser wireless systems
- Ko, Jae-Yun; Oh, Dong-Chan; Lee, Yong-Hwan
- Issue Date
- IEEE Trans. Wireless Commun., vol. 7, pp. 705-713, Feb. 2008
- In this paper, we propose a new beamforming
scheme that can work with partial channel information. The proposed beamforming scheme can simultaneously achieve multiuser
diversity (MUD) gain and beamforming gain by utilizing the beam weight information of the selected user in addition to the signal-to-noise ratio (SNR) information of all users. To fully exploit spatial multiplexing gain, we further consider the use of multiple beams. Multiple beams are generated in a sequential manner to reduce the interference among users, while virtually increasing the desired signal power. Finally, we analyze the
performance of the proposed scheme and verify it by computer simulation. Although the proposed scheme is somewhat affected
by the user mobility, numerical results show that the proposed scheme is quite effective in low mobility environments.
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