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:
Apr. 03, 2012
Filed:
Dec. 02, 2005
Hiroki Kashiwagi, Chiba, JP;
Yasuhiro Hamaguchi, Ichihara, JP;
Hiroki Kashiwagi, Chiba, JP;
Yasuhiro Hamaguchi, Ichihara, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
[Object] To implement wireless communication also with a communicating apparatus that is a limited band terminal capable of receiving only part of frequencies. [Overcoming Means] Provided are a frequency channel allocating section () that allocates frequency channels, a terminal reception quality information processing section () that calculates an optimal modulation rate and required transmit power for each subcarrier, a subcarrier power control section () that controls a level of transmit power for each subcarrier, and a determining section () that checks a reception bandwidth of a communicating apparatus, while determining whether the communicating apparatus is a full band terminal capable of receiving all the frequency channels in the system band or is a limited band terminal capable of receiving only part of frequencies, and when the communicating apparatus is the limited band terminal, the transmit power of all or part of subcarriers is decreased in a frequency channel that is adjacent to a reception band allocated to the communicating apparatus and that is allocated to another communicating apparatus.