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:
Oct. 20, 2015
Filed:
Oct. 03, 2011
Shimpei to, Osaka, JP;
Takashi Onodera, Osaka, JP;
Hiroshi Nakano, Osaka, JP;
Hiromichi Tomeba, Osaka, JP;
Minoru Kubota, Osaka, JP;
Kozue Hirata, Osaka, JP;
Alvaro Ruiz Delgado, Osaka, JP;
Shimpei To, Osaka, JP;
Takashi Onodera, Osaka, JP;
Hiroshi Nakano, Osaka, JP;
Hiromichi Tomeba, Osaka, JP;
Minoru Kubota, Osaka, JP;
Kozue Hirata, Osaka, JP;
Alvaro Ruiz Delgado, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A wireless communication system in which a base station apparatus having a plurality of transmission antennas and one or more terminal apparatuses communicate with each other is provided with at least two methods of a first feedback method and a second feedback method regarding propagation path information at the time of reception. In accordance with a communication condition between the base station apparatus and the terminal apparatus, or the function of the terminal apparatus, the terminal apparatus performs feedback by one of the two methods of the first feedback method and the second feedback method. The base station apparatus performs spatial multiplexing transmission on the basis of the propagation path information that has been fed back. Thus, in a system in which CSI is fed back for MIMO transmission, desired transmission characteristics can be efficiently obtained.