Spectrally invisible framing of high error rate data signals

Details Spectrally invisible framing of high error rate data signals Spectrally invisible framing of high error rate data signals

2006-05-16

2006-05-16

Nguyen, Hanh (Department: 2668)

Multiplex communications

Communication techniques for information carried in plural...

Combining or distributing information via time channels

C370S535000, C370S512000, C370S470000

Reexamination Certificate

active

07046700

ABSTRACT:
A framer is adapted for framing a high error rate data signal received through a link of a communications network, the data signal comprising M (an integer, M>1) interleaved sub-streams. The framer includes means for detecting a respective unique synchronizing word within each sub-stream. Each respective unique synchronizing word comprises: a non-unique position word having a first predetermined hamming distance; and a non-unique identifier word having a second predetermined hamming distance. The framer preferably includes M individual framers, and a master framer. Each individual framer operates to search the data signal to detect a respective one of the respective unique synchronizing words; and assert a respective individual frame found state for a first predetermined period of time when a respective one of the unique synchronizing words is found. The master framer controls operations of each individual framer, and declares a master frame lock state if the individual frame found state is asserted by all of the individual framers within a second predetermined period of time.

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