Data demodulation apparatus and method

Details Data demodulation apparatus and method Data demodulation apparatus and method

2005-03-25

2008-03-25

Ha, Dac V. (Department: 2611)

Pulse or digital communications

Testing

Data rate

C375S262000, C375S265000, C375S341000, C714S795000

Reexamination Certificate

active

07349467

ABSTRACT:
The invention provides a data decoding apparatus and method by which the data rate can be discriminated at a high speed using a Viterbi decoding process. Receive data are successively Viterbi decoded beginning with the top thereof. At a point of time when receive data which may possibly be end bit position data required for data rate discrimination are Viterbi decoded, data necessary for the data rate discrimination are successively extracted, and the data rate is discriminated based on the extracted necessary data.

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patent: 2000 13241 (2000-01-01), None
Okumura Y et al: “Variable-Rate Data Transmission with Blind Rate Detection for Coherent DS-CDMA Mobile Radio” IEICE Transactions on Commuications, Institute of Electronics Information and Comm. Eng. Tokyo, JP, vol. E81-B, No. 7, Jul. 1, 1998, pp. 1365-1372, XP000790169 ISSN: 0916-8516.
“Text proposal for blind rate detection with flexible positions” 3GPP TSG RAN WG1, vol. TSGR1#7(99)d38, Sep. 3, 1999, XP002248088, Hannover, Germany.
R.E. Blahut: “Theory and Practice of Error Control Codes” 1983, Addison-Wesley, Readings, US XP002248161.

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