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. 08, 2018
Filed:
Sep. 10, 2015
Fujitsu Limited, Kawasaki-shi, Kanagawa, JP;
Hongyang Chen, Kawasaki, JP;
Akira Ito, San Jose, CA (US);
FUJITSU LIMITED, Kawasaki, JP;
Abstract
A base station classifies at least some of radio communication apparatuses belonging to the same cell into a plurality of groups. The base station assigns to a first group a first signal sequence that is orthogonal to a cyclically shifted version thereof, and assigns to a second group a second signal sequence that is orthogonal to a cyclically shifted version thereof and that is different from the first signal sequence and from the cyclically shifted version of the first signal sequence. The radio communication apparatus belonging to the first group performs spread modulation on data using the first signal sequence or a signal sequence obtained by cyclically shifting the first signal sequence. The radio communication apparatus belonging to the second group performs spread modulation on data using the second signal sequence or a signal sequence obtained by cyclically shifting the second signal sequence.