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:
Jul. 07, 2015
Filed:
Jul. 20, 2012
Hiromichi Tomeba, Osaka, JP;
Takashi Onodera, Osaka, JP;
Hiroshi Nakano, Osaka, JP;
Alvaro Ruiz Delgado, Osaka, JP;
Hiromichi Tomeba, Osaka, JP;
Takashi Onodera, Osaka, JP;
Hiroshi Nakano, Osaka, JP;
Alvaro Ruiz Delgado, Osaka, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
More reduction of the amount of operation than in QRM-VP is realized while maintaining transmission performance that can be achieved by VP. A precoding apparatusthat performs preliminary processing on transmission data transmitted from a wireless transmission apparatus including a plurality of antennas to a wireless reception apparatus includes a linear filter generation sectionthat generates a linear filter on the basis of a result of estimation of a channel between an antenna unitand the wireless reception apparatus, a signal conversion sectionthat expands perturbation term candidates of a perturbation vector to be added to a transmission data vector and a reference signal associated with the transmission data in a complex plane, and a perturbation vector search sectionthat searches for the perturbation vector to be added to the transmission data vector by performing a quadrant search on the basis of the perturbation term candidates and the reference signal expanded in the complex plane. A transmission signal vector is calculated by adding a found perturbation vector to the transmission data vector and multiplying the transmission data vector by the linear filter.