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:
Mar. 31, 2015
Filed:
Apr. 22, 2009
Shimpei to, Osaka, JP;
Minoru Kubota, Osaka, JP;
Yasuhiro Hamaguchi, Osaka, JP;
Osamu Nakamura, Osaka, JP;
Kazunari Yokomakura, Osaka, JP;
Seiichi Sampei, Suita, JP;
Shinichi Miyamoto, Suita, JP;
Shinsuke Ibi, Suita, JP;
Shimpei To, Osaka, JP;
Minoru Kubota, Osaka, JP;
Yasuhiro Hamaguchi, Osaka, JP;
Osamu Nakamura, Osaka, JP;
Kazunari Yokomakura, Osaka, JP;
Seiichi Sampei, Suita, JP;
Shinichi Miyamoto, Suita, JP;
Shinsuke Ibi, Suita, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
To provide a system that can accommodate a greater number of terminals within a limited band and can obtain a higher transmission rate. While the number of frequency signals (spectrums) output in parallel by performing a spread spectrum from the DFT unit of each terminal is 12, the number of sub-carriers constituting one sub-channel is set at 10 or 11. In this case, the users (users A and G) allocated to the sub-channels at both ends of the band will not perform transmission of one frequency signal at the end (one sub-carrier) of all the frequency signals output from the DFT unit, whereas the users (users B to F) allocated to the other sub-channels will not perform transmission of the frequency signals at the ends (two sub-carriers). This transmission can be realized by deleting (clipping) the associated number of signals from both ends or from one end of the frequency signals output from the DFT unit of each terminal and allocating the frequency signals after clipping, to individual sub-channels.