Demodulating device and method in orthogonal frequency...

Details Demodulating device and method in orthogonal frequency... Demodulating device and method in orthogonal frequency...

2011-03-15

2011-03-15

Corrielus, Jean B (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S372000

Reexamination Certificate

active

07907686

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.

REFERENCES:
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patent: 2001/0053124 (2001-12-01), Ichihara et al.
patent: 2007/0248002 (2007-10-01), Kim et al.
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Tsuschie Koji, OFDM Modulation/Demodulation System and Method Therefor, Feb. 28, 2003, JP 2003060614 (Abstract for Japanese Patent No. JP02003060614A).
Machine translation of JP02003060614A, Aug. 11, 2010.
Wang, et al., “Improving Performance of Multi-user OFDM Systems Using Bit-wise Interleaver”, Electronics Letters vol. 37, No. 19, Sep. 13, 2001.

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