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:
May. 22, 2018
Filed:
Dec. 26, 2013
Sharp Kabushiki Kaisha, Osaka-shi, Osaka, JP;
Waseda University, Shinjuku-ku, Tokyo, JP;
Takashi Onodera, Osaka, JP;
Hiromichi Tomeba, Osaka, JP;
Minoru Kubota, Osaka, JP;
Fumiaki Maehara, Shinjuku, JP;
Fumio Takahata, Shinjuku, JP;
SHARP KABUSHIKI KAISHA, Sakai, JP;
WASEDA UNIVERSITY, Tokyo, JP;
Abstract
It is intended to provide a transmission device, a reception device and a communication system capable of improving transmission characteristics by performing packet combining by HARQ in MU-MIMO transmission using non-linear precoding. In a case of receiving NAK from any of terminal devices (), a base station device () retransmits a packet, in which an error occurs, addressed to this terminal device. The base station device () transmits the data to be retransmitted together with other transmission data addressed to a different terminal device or addressed to the own terminal device by spatial multiplexing transmission with MU-MIMO. At this time, for the retransmission data, precoding is performed such that a perturbation term same as a perturbation term which has been added to this data by non-linear precoding at the time of initial transmission is added.