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Registered DEMODULATING DEVICE AND METHOD IN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEM
이미지 확대
DEMODULATING DEVICE AND METHOD IN ORTHOGONAL FREQUENCY DIVISION MULTIPLE ACCESS COMMUNICATION SYSTEM
- Inventors
- Kim Jun-Woo, 박윤옥
- Application No.
- 11930029 (2007.10.30)
- Publication No.
- 20080117962 (2008.05.22)
- Registration No.
- 7907686 (2011.03.15)
- Country
- UNITED STATES
- Abstract
- The present invention relates to a demodulating device and method in an orthogonal frequency division multiple access (OFDMA) communication system. A demodulating device according to an exemplary embodiment of the invention uses only one demodulator, one slot buffer, and one channel decoder to demodulate a plurality of data bursts included in one frame. In addition, in order to reduce a memory size required to demodulate a plurality of data bursts, a memory is managed in the units of sub-channels, instead of classifying memory cells so as to correspond to the data bursts. According to the demodulating device, it is possible to simplify a hardware structure and to reduce a memory size required to demodulate data bursts. As a result, it is possible to reduce manufacturing costs and decrease the number of signal lines of a channel decoder required for an interface.
- KSP Keywords
- Channel Decoder, Communication system, Frequency division, Frequency division multiple access(FDMA), Memory size, Orthogonal Frequency Division Multiple Access(OFDMA), Sub-channels, hardware structure, manufacturing cost, memory cell, multiple access