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:
Jun. 23, 2015
Filed:
Oct. 21, 2011
Seung Geun Kim, Daejeon, KR;
Sea Moon Kim, Daejeon, KR;
Sung Hoon Byun, Daejeon, KR;
Jong Won Park, Daejeon, KR;
Yong Kon Lim, Daejeon, KR;
Chang Ho Yun, Busan, KR;
Seung Geun Kim, Daejeon, KR;
Sea Moon Kim, Daejeon, KR;
Sung Hoon Byun, Daejeon, KR;
Jong Won Park, Daejeon, KR;
Yong Kon Lim, Daejeon, KR;
Chang Ho Yun, Busan, KR;
KOREA OCEAN RESEARCH AND DEVELOPMENT INSTITUTE, Ansan-Si, KR;
Abstract
Apparatus and method of transmitting a preamble having additional information in differential modulation packet data communication. The apparatus includes a phase rotator that outputs a phase rotation quantity corresponding to additional information to be applied to a transmission target packet, a transmission-multiplier that multiplies the phase rotation quantity output from the phase rotator by a preamble to be transmitted, a symbol mapper that converts header and payload data to be applied to the transmission target packet into symbols and outputs the same, a multiplexer that processes an output signal of the transmission-multiplier and an output signal of the symbol mapper to be selectively output through an output end to form a symbol stream in units of packets, and a differential symbol converter that converts the symbol stream output from the multiplexer according to a predetermined differential modulation method and outputs the converted symbol stream.