The Farrell Law Firm, P.C.
Demodulation apparatus for efficiently embodying adaptive modulation and coding method in OFDMA based packet communication system and method thereof
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.
Electronics and Telecommunications Research Institute KT Corporation SK Telecom., Ltd Samsung Electronics Co., Ltd Hanaro Telecom., Inc. Ktfreetel Co., Ltd
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inventional inventional additional
Young-Hoon Youn-Ok Su-Chang Jun-Woo
Kim Park Chae Kim