Methods and apparatus for adaptive mimic rejection

Pulse or digital communications – Synchronizers – Frequency or phase control using synchronizing signal

Reexamination Certificate

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C375S354000, C375S365000, C370S514000

Reexamination Certificate

active

06839392

ABSTRACT:
Methods and apparatus for use in aligning frames in a receiver of a data transmission system include checking one or more bit positions associated with a received data stream to determine a number of bits in the bit positions, respectively, that match a predetermined bit pattern. The number for a bit position is compared to a first threshold value and a second threshold value. A bit position is identified as being associated with a false framing pattern or mimic when the number is not less than the first threshold value. A bit position is identified as a potential framing bit position or possible framing bit position when the number is not less than the second threshold value. The first threshold value is changed when a bit position is identified as a potential framing bit position and another bit position is identified as being associated with a false framing pattern. For example, the first threshold value may be increased by a given value for every frame that a bit position is identified as a potential framing bit position and another bit position is identified as being associated with a false framing pattern. The given value may be a value of one, a value less than one, or a value greater than one. Frame alignment is declared when a bit position is identified as a potential framing bit position and no other bit position is identified as being associated with a false framing pattern.

REFERENCES:
patent: 3621140 (1971-11-01), Griffiths et al.
patent: 4316284 (1982-02-01), Howson
patent: 5056119 (1991-10-01), Sakalian et al.
patent: 5377209 (1994-12-01), Skinner et al.
patent: 5598444 (1997-01-01), Lim
patent: 5608734 (1997-03-01), Sandler et al.
patent: 5621773 (1997-04-01), Varma et al.
patent: 5680421 (1997-10-01), Shiino et al.
patent: 5809093 (1998-09-01), Cooper
patent: 5953378 (1999-09-01), Hotani et al.
patent: 6389088 (2002-05-01), Blois et al.
patent: 6400732 (2002-06-01), Castagna et al.

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