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:
Aug. 09, 2016
Filed:
Mar. 01, 2010
Kenichi Higuchi, Saitama, JP;
Yoshihisa Kishiyama, Kanagawa, JP;
Kenichi Higuchi, Saitama, JP;
Yoshihisa Kishiyama, Kanagawa, JP;
NTT DOCOMO, INC., Tokyo, JP;
Abstract
To obtain a high frequency diversity effect while suppressing inter-code interference in code multiplexing transmission in an OFDM-based radio access scheme, a transmission apparatus is provided with an orthogonal spreading code generating section () that generates different spreading codes based on orthogonal code sequences, a phase rotation giving section () and spreading modulation section () which provide the information symbols or spreading codes with different phase rotation for each symbol sequence and then, spreads the information symbols with the spreading codes for each symbol sequence, and a multiplexing section () that multiplexes spread symbols of different symbol sequences, where the information symbols or the spreading codes are rotated by a phase rotation amount such that overlaps in a signal constellation in polar coordinates of spread symbols for transmitting different information symbols are controlled to within a required range.