Optical signal transmitter and optical signal encoder using constant modulus formats, and method for generating modulation codes
US10320486B1 · kind B1 · utility
Assignees
Inventors
Key dates
| Filing date | May 16, 2018 |
| Grant date | Jun 11, 2019 |
| Priority date | — |
| Expiry date | May 16, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/36
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An encoder for generating an optical data code from a symbol performs a symbol mapping and an encoding, wherein the symbol mapping performs providing a first constellation format having first and second amplitude rings with circular grids corresponding to phase angles, providing a second constellation format having the first and second amplitude rings with the circular grids corresponding to the phase angles, applying a first part of the symbol to one of the first and second constellation formats to represent the first part of the symbol by one of the first and second amplitude rings with one of the circular grids, and applying a second part of the symbol to another one of the first and second constellation formats to represent the second part of the symbol by one of the first and second amplitude rings with one of the circular grids. The first and the second constellation can be mapped to subcarrier modulation in three different ways.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.