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. 29, 2011
Filed:
Nov. 03, 2004
Jun-woo Kim, Daejeon, KR;
Young-hoon Kim, Daejeon, KR;
Su-chang Chae, Daejeon, KR;
Youn-ok Park, Daejeon, KR;
Jun-Woo Kim, Daejeon, KR;
Young-Hoon Kim, Daejeon, KR;
Su-Chang Chae, Daejeon, KR;
Youn-Ok Park, Daejeon, KR;
Electronics and Telecommunications Research Institute, , KR;
Samsung Electronics Co., Ltd, , KR;
KT Corporation, , KR;
SK Telecom., Ltd, , KR;
Ktfreetel Co., Ltd, , KR;
Hanaro Telecom., Inc., , KR;
Abstract
Disclosed is a demodulation apparatus for receiving signals by an adaptive modulation and coding method, and demodulating the signals, in an OFDMA based packet communication system, comprising: a QAM demapper for performing QAM demapping to the received signals by a modulation method using a maximum modulation ratio, until modulation methods for each of sub-channels are analyzed; a slot buffer for storing the data outputted from the QAM demapper; a channel decoder for decoding the data stored in the slot buffer and analyzing modulation methods for each sub-channels and transferring the analyzed modulation methods to the QAM demapper; and in at the same time, reading valid data from the data stored in the slot buffer, based on the analyzed modulation methods for each sub-channels, and demodulating the valid data.