SHERP

Inter-Sector Beamforming with MMSE Receiver in the Downlink of TDD Cellular Systems
TDD 기반의 셀룰라 시스템에서 하향링크 다중 섹터 빔포밍 기법

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Authors
Yeom, Jae-Heung; Lee, Keon-Wook; Lee, Yong-Hwan
Issue Date
2008-04
Citation
통신정보 합동학술대회(JCCI), 2008년 4월
Keywords
time-division duplexdownlinkbeamformingreciprocity
Abstract
The use of beamforming is effective for users in limited power environments. However, when it is applied
to the downlink of a cellular system with universal frequency reuse, users near the sector boundary may
experience significant interference from more than one sector. The use of a minimum mean square error
(MMSE)-type receiver may not sufficiently cancel out the interference when a small number of receive
antennas is used. In this paper, we consider the use of inter-sector beamforming that cooperates with a
neighboring sector in the same cell to mitigate this interference problem in time-division duplex (TDD)
environments. The proposed scheme can avoid interference from an adjacent sector in the same cell, while
enhancing the transmit array gain by using the TDD reciprocity. The performance of the proposed scheme is
analyzed in terms of the output signal-to-interference-plus-noise power ratio (SINR) with combined use of an
MMSE receiver. The effectiveness of the proposed scheme is verified by computer simulation.
Language
English
URI
http://hdl.handle.net/10371/7090
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College of Engineering/Engineering Practice School (공과대학/대학원)Dept. of Electrical and Computer Engineering (전기·정보공학부)Others_전기·정보공학부
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