The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 15, 2011
Filed:
Nov. 17, 2006
Seung-hoon Nam, Seoul, KR;
Myeon-kyun Cho, Seongam-si, KR;
Yung-soo Kim, Seongnam-si, KR;
Sei-joon Shim, Seoul, KR;
Kyeong-yeon Kim, Seoul, KR;
Chung-yong Lee, Seoul, KR;
Seung-Hoon Nam, Seoul, KR;
Myeon-Kyun Cho, Seongam-si, KR;
Yung-Soo Kim, Seongnam-si, KR;
Sei-Joon Shim, Seoul, KR;
Kyeong-Yeon Kim, Seoul, KR;
Chung-Yong Lee, Seoul, KR;
Abstract
Provided are an apparatus and method for eliminating multi-user interference in a codebook-based beamforming system. A transmitter for providing a service to multi-users in the codebook-based beamforming system includes a beamformer for generating beamformed user signals by multiplying transmit data of users, to whom the service is to be provided, by corresponding weighting factor vectors using feedback information; a null space generator for generating a null space matrix orthogonal to weighting factor vectors of other users; and a projector for projecting the beamformed user signals on the corresponding null space matrix and transmitting the resulting signals through a plurality of antennas. Because the multi-user signals can maintain orthogonality, the performance degradation caused by the multi-user interference can be prevented.