Probabilistic constellation shaping for point-to-multipoint optical fiber communication systems employing subcarriers
US12381648B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 2, 2022 |
| Grant date | Aug 5, 2025 |
| Priority date | — |
| Expiry date | Nov 2, 2042 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04J14/0282
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
Consistent with the present disclosure, a transmitter is provided in a hub node of a point-to-multi-point optical communication system. The transmitter supplies a plurality or group of optical subcarriers, each subgroup of the group of optical subcarriers in, one example, is associated with a respective leaf node. Since the leaf nodes may be located at different distances from the hub node, the modulation of each optical subcarrier subgroup is optimized for the distance and impairments associated with the optical path over which the subcarrier subgroup is transmitted to its designated leaf. Namely, probabilistic shaping is employed, in one example, to adjust the modulation so that a maximum spectral efficiency is supported for a given SNR associated with the hub-leaf link.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.