Optimized chromatic dispersion filter
US8792789B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2012 |
| Grant date | Jul 29, 2014 |
| Priority date | — |
| Expiry date | Aug 16, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04B10/6161
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A method is provided for performing chromatic dispersion (CD) compensation. A zero-forcing filter is calculated with a number of taps (n) required to nullify a chromatic dispersion frequency response of an optical channel. The number of taps in the zero-forcing filter is truncated to a number equal to (n−x), where x is an integer greater than 0. In one aspect, the chromatic dispersion frequency response of the optical channel is partitioned into a plurality of constituent chromatic dispersion responses, and a zero-forcing filter is calculated for each of the plurality of constituent chromatic dispersion responses. The number of taps in each of the plurality of zero-forcing filters is truncated, and the CD compensation filter is formed for each of the plurality of truncated tap zero-forcing filters. In another aspect, the tap values of the zero-forcing filter are quantized to a finite quantization set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.