Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Reexamination Certificate
2006-08-29
2006-08-29
Nguyen, Duc M. (Department: 2618)
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
C455S258000, C455S265000, C455S192100, C455S192300, C375S326000, C375S344000, C375S375000
Reexamination Certificate
active
07099642
ABSTRACT:
A carrier recovery method and apparatus using multiple stages of carrier frequency recovery are disclosed. A receiver uses multiple frequency generation sources to generate carrier signals used to downconvert a received signal. An analog frequency reference having a wide frequency range and coarse frequency resolution is used in conjunction with a digital frequency reference having a narrow frequency range and fine frequency resolution. The multiple carrier signals are multiplied by a received signal to effect a multi-stage downconversion, resulting in a baseband signal. A frequency tracking module measures the residual frequency error present in the baseband signal. The measured residual frequency error is then used to adjust the frequencies of the carrier signals generated by the multiple frequency generation sources.
REFERENCES:
patent: 5487186 (1996-01-01), Scarpa
patent: 5533050 (1996-07-01), Isard et al.
patent: 5712869 (1998-01-01), Lee et al.
patent: 5995563 (1999-11-01), Ben-Efraim et al.
patent: 6192088 (2001-02-01), Aman et al.
patent: 6317067 (2001-11-01), Mohindra
patent: 6351506 (2002-02-01), Lewicki
patent: 2003/0026362 (2003-02-01), Kimura
patent: 2003/0027537 (2003-02-01), Kimura
patent: 0689324 (1995-12-01), None
patent: 01054944 (1989-02-01), None
Fernandez-Corbaton Ivan Jesus
Jayaraman Srikant
Smee John
Nguyen Duc M.
Nguyen Thien T.
QUALCOMM Incorporated
Wadsworth Philip R.
Young Roberta A.
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