Communication apparatus including a demodulator having a...

Details Communication apparatus including a demodulator having a... Communication apparatus including a demodulator having a...

2005-06-29

2009-11-17

Liu, Shuwang (Department: 2611)

Pulse or digital communications

Receivers

Amplitude modulation

C375S316000, C329S311000

Reexamination Certificate

active

07620122

ABSTRACT:
A communication apparatus includes a receiver may receive a signal including one or more frequencies associated with a symbol. The symbol may be any type of symbol such as a text telephone symbol encoded according to a cellular text telephone modem (CTM) protocol, for example. The receiver includes a demodulator unit that may be configured to determine the one or more the frequencies associated with the symbol and to generate a soft decision corresponding to the one or more frequencies. The soft decision may be based upon energies associated with the one or more frequencies.

REFERENCES:
patent: 6345251 (2002-02-01), Jansson
patent: 6434198 (2002-08-01), Tarraf
patent: 6611804 (2003-08-01), Dorbecker
patent: 2002/0057765 (2002-05-01), Hyziak
patent: 2002/0061076 (2002-05-01), Seki et al.
patent: 2003/0053603 (2003-03-01), Vejlgaard
patent: 2005/0002472 (2005-01-01), Lee et al.
patent: 2006/0023848 (2006-02-01), Mohler
patent: 2006/0067394 (2006-03-01), Chen
The cellular text telephone modem—the solution for supporting text telephone functionality in GSM networks Dorbecker, M.; Hellwig, K.; Jansson, F.; Frankkila, T.; Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on vol. 3, May 7-11, 2001 pp. 1441-1444 vol. 3.
Kevin Banks; The Goertzel Algorithm; Aug. 28, 2002; Embedded.com (http://www.embedded.com/showArticle.jhtml?articleID=9900722).

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