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Registered MULTIPLE BEAMFORMING METHOD AND APPARATUS

다중 빔형성 방법 및 장치
이미지 확대
Inventors
In-Kyeong Choi, 이충용, 강지원, Dongseung Kwon
Application No.
12677630 (2008.09.11)
Publication No.
20100189002 (2010.07.29)
Registration No.
8331255 (2012.12.11)
Country
UNITED STATES
Abstract
The present invention relates to a beamforming method and apparatus. A beamforming method for use in a base station for transmitting a plurality of streams through a plurality of antennas includes: receiving feedback information including information on a first codeword selected from a codebook including a plurality of codewords from each of a plurality of user terminals; grouping the plurality of user terminals by use of the feedback information from each user terminal; determining a user terminal to which a plurality of streams will be assigned of the plurality of user terminals, and determining a second codeword to be used for beamforming from the codebook by use of the feedback information of each user terminal and grouping information; and multiplying data to be transmitted through the plurality of steams by the second codeword and a unitary matrix.
KSP Keywords
Feedback information, User terminals, base station(BS), unitary matrix