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:
May. 14, 2024
Filed:
Jan. 26, 2022
Cable Television Laboratories, Inc., Louisville, CO (US);
Junwen Zhang, Shanghai, CN;
Zhensheng Jia, Superior, CO (US);
Mu Xu, Broomfield, CO (US);
Haipeng Zhang, Broomfield, CO (US);
Luis Alberto Campos, Superior, CO (US);
Cable Television Laboratories, Inc., Louisville, CO (US);
Abstract
A method for estimating a chromatic dispersion of an optical-fiber channel is disclosed includes receiving, via the optical-fiber channel, a chromatically-dispersed signal having a symbol rate 1/T. The method also includes, for each chromatic-dispersion value of a plurality of chromatic-dispersion values, determining a respective clock-tone magnitude by: (i) applying, to the chromatically-dispersed signal or a signal derived therefrom, a chromatic dispersion equal to the chromatic-dispersion value to generate a dispersion-compensated signal, and (ii) extracting the clock-tone magnitude from at least one of a positive-frequency clock-tone and a negative-frequency clock-tone of the dispersion-compensated signal, the positive-frequency clock-tone and the negative-frequency clock-tone being spectral components of the dispersion-compensated signal at temporal frequencies 1/T or −1/T respectively. The method also includes determining a maximum of the extracted clock-tone magnitudes. The estimated chromatic dispersion is the chromatic-dispersion value, of the plurality of chromatic-dispersion values, corresponding to the maximum extracted clock-tone magnitude.