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. 25, 2014
Filed:
Jun. 02, 2010
Tommi Koivisto, Espoo, FI;
Timo Roman, Espoo, FI;
Mihai Enescu, Espoo, FI;
Shuang Tan, Beijing, CN;
Helka-liina Määttänen, Helsinki, FI;
Tommi Koivisto, Espoo, FI;
Timo Roman, Espoo, FI;
Mihai Enescu, Espoo, FI;
Shuang Tan, Beijing, CN;
Helka-Liina Määttänen, Helsinki, FI;
Nokia Corporation, Espoo, FI;
Abstract
An apparatus and method for selecting a beam group and a subset of beams in a communication system are disclosed. The method includes: measuring channel state information (CSI) on a downlink from a base station (); identifying a selected beam group out of a set of beam groups according to a wideband property of the CSI (); identifying a selected subset of beams in the selected beam group according to at least one subband (). Wherein the characteristic of the set of beam groups depends on a transmission rank and the number of beams in the selected subset of beams is equal to the transmission rank. The method further includes: generating encoded feedback information identifying the selected beam group and the selected subset of beams for each subband in a double codebook format (), transmitting the encoded feedback information to the base station. A computer program product comprising the computer program code which is configured to cause the apparatus to implement above operations is also disclosed.