Performance monitoring for optical links
US7295774B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 14, 2005 |
| Grant date | Nov 13, 2007 |
| Priority date | — |
| Expiry date | Dec 14, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L25/03178
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method for estimating at least one optical link parameter using a Viterbi equalizer (1) generating averaged values (M) of signal amplitudes of a distorted optical signal transmitted through an optical link (2) for a set of decided bit patterns (a, b, c, d, . . . ), the method comprising the following steps: forming a first parameter set (S) characteristic of a distorted signal sequence using the averaged values (M(a), M(b), M(d), M(g)) for a given sequence (abdg) of bit patterns (a, b, c, d, . . . ), comparing the first parameter set (S) to a plurality of reference parameter sets (R1, R2, . . . ) characteristic for reference signal sequences of the same sequence (abdg) of bit patterns (a, b, c, d, . . . ), each of the reference parameter sets (R1, R2, . . . ) having a known value of the at least one optical link parameter, and selecting the reference parameter set (R) with the closest correlation to the first parameter set (S), the known value of the at least one optical link parameter of the selected reference parameter set (R) being used as an estimate for the at least one optical link parameter. A computer program product comprising a software or a hardware implementing the me…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.