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. 08, 2006
Filed:
Jun. 19, 2001
Manabu Sawada, Yokohama, JP;
Masahiro Kuwabara, Yokosuka, JP;
Manabu Sawada, Yokohama, JP;
Masahiro Kuwabara, Yokosuka, JP;
DENSO Corporation, Kariya, JP;
Abstract
Communication between a stationary terminal such as an on-road terminal and a mobile terminal mounted on an automotive vehicle is performed under an OFDM system. Before transmitting data signals from the mobile terminal to the stationary terminal, a control signal indicating the number of sub-carries used in the data transmission is sent to the stationary terminal. The number of sub-carriers is decreased in accordance with increase of the moving speed to avoid deterioration in communication quality due to the moving speed increase. A modification formula and/or an error-correction-code coding rate used in the data transmission may be varied according to the moving speed in place of or together with varying the number of sub-carriers.