The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 2020
Filed:
Nov. 18, 2019
Shahab Oveis Gharan, Ottawa, CA;
Lukas Jakober, Ottawa, CA;
Shahab Oveis Gharan, Ottawa, CA;
Lukas Jakober, Ottawa, CA;
CIENA CORPORATION, Hanover, MD (US);
Abstract
A receiver is configured to calculate a representation of a received signal conveying symbols at a frequency f, the representation comprising non-zero components at frequencies of magnitudes exceeding f/2. The receiver calculates a first term comprising a function of a phase difference between the representation at a first pair of frequencies separated by a gap Δ and comprised within a first band of width 2δ centered at f/2, and a second term comprising a function of a phase difference between the representation at a second pair of frequencies separated by the gap Δ and comprised within a second band of width 2δ centered at −f/2, wherein Δ<2δ, and wherein the higher frequency of the first pair and the higher frequency of the second pair are separated by the frequency f. An estimate of chromatic dispersion in the received signal is calculated based on the first term and the second term.