Apparatus and method for detecting feedback information in a...

Multiplex communications – Communication over free space – Combining or distributing information via code word channels...

Reexamination Certificate

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C370S208000, C370S902000, C370S335000, C370S210000, C370S340000, C455S067700, C455S069000, C375S142000, C375S150000, C375S335000

Reexamination Certificate

active

07953059

ABSTRACT:
An apparatus and method for determining feedback information detection in a broadband wireless communication system are provided. In the detection determining apparatus, a demodulator correlates each of tiles carrying received feedback information with an orthogonal vector including a pilot symbol in each possible codeword, each tile being a predetermined number of subcarriers, and calculates the squares of the absolute values of the correlations. A codeword correlation calculator sums the squares of the absolute value of the correlations of the tiles for each possible codeword. A detection decider determines whether to perform detection on the feedback information based on the maximum of the sums.

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Inseok Hwang et al., “Reuse of Cqich Fast Feed-Back Sub-Channels”, IEEE 802.16 Broadband Wireless Access Working Group, pp. 1-6, Mar. 9, 2005.
Myung-Kwan Byun et al., “Fast—Feedback Channel Codeword Extension”, IEEE 802.16 Broadband Wireless Access Working Group, pp. 1-10, Aug. 17, 2004.

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