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:
Jul. 31, 2012
Filed:
Jan. 15, 2010
Satoshi Nakajima, Miyagi-Ken, JP;
Satoshi Hayasaka, Miyagi-ken, JP;
Masaki Sato, Miyagi-ken, JP;
Jun Takahashi, Miyagi-ken, JP;
Satoshi Nakajima, Miyagi-Ken, JP;
Satoshi Hayasaka, Miyagi-ken, JP;
Masaki Sato, Miyagi-ken, JP;
Jun Takahashi, Miyagi-ken, JP;
Alps Electric Co., Ltd., Tokyo, JP;
Abstract
A mobile device for a vehicle includes a receiving unit that receives transmission signals transmitted from individual transmitting antennas of a vehicle-side device; a control unit that determines distances to the individual transmitting antennas using the signal strengths of the received transmission signals; and a transmitting unit that transmits, to the vehicle-side device using wireless communication, data items indicating the distances. In a time period in which communication is not performed between the mobile device and the vehicle-side device, the signal strength of a received signal is measured, thereby obtaining a measurement value, and the measurement value is stored as a noise element in a memory. When communication between the mobile device and the vehicle-side device is performed, correction for noise is performed on the signal strengths of the transmission signals transmitted from the transmitting antennas, and the distances are determined.