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:
Jan. 20, 2015
Filed:
Jun. 17, 2013
Electronics and Telecommunications Research Institute, Daejeon, KR;
Jin-Doo Jeong, Daejeon, KR;
Tae-Gyu Kang, Daejeon, KR;
Sang-Kyu Lim, Daejeon, KR;
Il-Soon Jang, Daejeon, KR;
Dae-Ho Kim, Daejeon, KR;
You-Jin Kim, Daejeon, KR;
Seong-Hee Park, Daejeon, KR;
In-Su Kim, Daejeon, KR;
Hyun-Jong Kim, Cheongju-si, KR;
Electronics and Telecommunications Research Institute, Daejeon, KR;
Abstract
Disclosed herein are a visible light communication method and apparatus. The visible light communication method includes determining whether a current location is the start of a symbol of a transmission signal, setting a sample index, a signal accumulated value for an accumulation region of a front half portion of the symbol, and a signal accumulated value for an accumulation region of a rear half portion of the symbol, determining whether the sample index belongs to an accumulation region of the front or rear half portion of the symbol, and accumulating samples of the transmission signal in accordance with the location to which the sample index belongs, determining whether a current location corresponds to the end of the symbol, and outputting a Variable Pulse Position Modulation (VPPM) communication signal corresponding to the transmission signal.