Control algorithm using hysteresis sub-states in QAM modems

Details Control algorithm using hysteresis sub-states in QAM modems Control algorithm using hysteresis sub-states in QAM modems

2007-05-26

2010-11-16

Harper, Kevin C (Department: 2462)

Multiplex communications

Generalized orthogonal or special mathematical techniques

C375S232000, C375S348000

Reexamination Certificate

active

07835259

ABSTRACT:
An apparatus for automated acquisition of a QAM signal. The apparatus employs a State machine progressing from an initial State to a final State. The State Machine comprises: (A) an AGC State further comprising a Minimum Sub-State further comprising: Coarse Estimate Sub-State; and an AGC Lock Sub-State further comprising Maximum Sub-State; (B) a Clock 1 State further comprising a Minimum Sub-State, and a Maximum Sub-State; (C) a Clock 2 State further comprising: a Minimum Sub-State; and a Maximum Sub-State; and (D) a Blind State further comprising a Minimum Sub-State; a Threshold Sub-State further comprising a Maximum Sub-State; and a Hysteresis Sub-State.

REFERENCES:
patent: 6067319 (2000-05-01), Copeland
patent: 6278741 (2001-08-01), Danzer et al.
patent: 6510188 (2003-01-01), Isaksen et al.
patent: 6904098 (2005-06-01), Isaksen et al.
patent: 7079605 (2006-07-01), Isaksen et al.

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