Compensating impairments of optical channel using adaptive...

Optical communications – Receiver – Including postcompensation

Reexamination Certificate

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C398S202000, C375S233000

Reexamination Certificate

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07623797

ABSTRACT:
An embodiment of the invention is a technique to equalize received samples. An optical to electrical converter (OEC) produces an electrical signal vector representing at least one of amplitude, phase, and polarization information of a modulated optical carrier transmitted through an optical channel with impairments. A signal processor processes the electrical signal vector to compensate the impairments of the optical channel. The signal processor includes at least an adaptive equalizer to generate an equalized output, a decision, and an error. The error is difference between the equalized output and the decision. The adaptive equalizer has an adaptation based on at least the error.

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