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:
Nov. 27, 2012
Filed:
Feb. 20, 2009
David Mazzarese, Suwon-si, KR;
David Mazzarese, Suwon-si, KR;
Samsung Electronics Co., Ltd., Suwon-Si, KR;
Abstract
According to one aspect of the present invention, there is provided a method for feeding back Channel State Information (CSI) by a Base Station (BS) in a communication system using Space Division Multiple Access (SDMA). The CSI feedback method includes grouping Mobile Stations (MSs) into at least two groups; allocating a second feedback channel over which CSI is to be fed back, to semi-orthogonal MSs having a semi-orthogonal relationship with MSs included in a first group which is one of the at least two groups, among MSs included in a second group which is one of the at least two groups and is different from the first group; receiving CSIs being fed back from the semi-orthogonal MSs through the second feedback channel; and selecting at least one MS satisfying a semi-orthogonal criterion to the MSs included in the first group from among the semi-orthogonal MSs that feed back CSIs through the second feedback channel.