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:
Nov. 13, 2012
Filed:
May. 01, 2009
Daisuke Ide, Kanagawa, JP;
Daisuke Ide, Kanagawa, JP;
Kabushiki Kaisha Toshiba, Tokyo, JP;
Abstract
In contactless communication in which a carrier wave transmitted from a first antenna of a host is received via a second antenna of a terminal and the carrier wave is amplitude-modulated on the terminal to transmit data to the host, a carrier wave detected from the first antenna is amplitude-demodulated to obtain a first demodulated output, and phase information included in the carrier wave detected from the first antenna is extracted and the extracted phase information is decoded to obtain a second demodulated output. Then, either of the first and second demodulated outputs is selected and output. Even when a null is caused by an antenna distance between a PCD and a PICC, demodulated data is reliably obtained by utilizing demodulation processing that uses phase information.