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Registered DEMODULATION APPARATUS FOR EFFICIENTLY EMBODYING ADAPTIVE MODULATION AND CODING METHOD IN OFDMA BASED PACKET COMMUNICATION SYSTEM AND METHOD THEREOF
이미지 확대
DEMODULATION APPARATUS FOR EFFICIENTLY EMBODYING ADAPTIVE MODULATION AND CODING METHOD IN OFDMA BASED PACKET COMMUNICATION SYSTEM AND METHOD THEREOF
- Inventors
- Kim Jun-Woo, Young-Hoon Kim, 박윤옥, Chae Suchang
- Application No.
- 10583167 (2004.11.03)
- Publication No.
- 20070248002 (2007.10.25)
- Registration No.
- 8068510 (2011.11.29)
- Country
- UNITED STATES
- 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.
- KSP Keywords
- Adaptive Modulation and Coding(AMC), Channel Decoder, Coding method, Communication system, Modulation method, Modulation ratios, Sub-channels, adaptive modulation, valid data