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. 19, 2013
Filed:
Sep. 17, 2009
Jong-sub Cha, Seoul, KR;
Seung-il Myong, Daejeon-si, KR;
Heyung-sub Lee, Daejeon-si, KR;
Sang-hyun MO, Daejeon-si, KR;
Jong-suk Chae, Daejeon-si, KR;
Jong-sub Cha, Seoul, KR;
Seung-il Myong, Daejeon-si, KR;
Heyung-sub Lee, Daejeon-si, KR;
Sang-hyun Mo, Daejeon-si, KR;
Jong-suk Chae, Daejeon-si, KR;
Electronics and Telecommunications Research Institute, Daejeon-Si, KR;
Abstract
An active radio frequency identification (RFID) apparatus having an additional transmitter in addition to a single transmitter is provided. The active RFID apparatus includes a first transmitter including a first pseudo noise (PN) code generator to generate a direct sequence spread spectrum (DSSS) introduced by ISO/IEC (International Organization for Standardization/International Electrotechnical Commission) 24730-2 or ISO/IEC 18185-5 type B; and a second transmitter including a second PN code generator to perform an AND operation on an initial value and a fed back value and shift the resultant value of the AND operation, to perform an XOR operation on particular bits from among the shifted bits and to perform an XOR operation again on the shifted bits and the resulting value of the XOR operation to finally generate a PN code. Accordingly, where an additional PN code is added besides an existing PN code, a PN code having excellent auto correlation characteristics allowing discrimination of the PN code itself and cross-correlation characteristics providing a code discrimination ability with respect to another code can be generated.