Apparatus for recovering carrier

Details Apparatus for recovering carrier Apparatus for recovering carrier

2007-07-31

2007-07-31

Tse, Young T. (Department: 2611)

Pulse or digital communications

Receivers

Angle modulation

C375S332000, C375S344000, C329S306000, C329S346000

Reexamination Certificate

active

10676070

ABSTRACT:
An apparatus for recovering a carrier is disclosed, for recovering a carrier correctly even though ghost exists in a signal received in a television, which includes a signal converter outputting baseband I, Q signals by multiplying digitized passband I, Q signals by a complex carrier according to a phase error; first and second filters removing data components of the baseband I, Q signals; a divider dividing a signal outputted from the second filter by a signal outputted from the first filter; a multiplier multiplying a signal outputted from the divider by the baseband I signal delayed for a predetermined time period; and an oscillator generating a complex carrier according to a signal outputted from the multiplier.

REFERENCES:
patent: 5796786 (1998-08-01), Lee
patent: 5799037 (1998-08-01), Strolle et al.
patent: 6023491 (2000-02-01), Saka et al.
patent: 6115431 (2000-09-01), Lee
patent: 6191649 (2001-02-01), Sugita et al.
patent: 6192088 (2001-02-01), Aman et al.
patent: 6671339 (2003-12-01), Ahn
patent: 2001/0006539 (2001-07-01), Kim
patent: 2002/0105599 (2002-08-01), Hong et al.

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