Symmetric spherical QAM constellation
US6996189B1 · kind B1 · utility
7Cited by
1References
24Claims
0Family size
Assignee
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Key dates
| Filing date | Jul 26, 2002 |
| Grant date | Feb 7, 2006 |
| Priority date | — |
| Expiry date | Sep 7, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L2025/03522
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A quadrature amplitude modulation implementation incorporating a symmetric spherical quadrature amplitude modulation constellation. The symmetric spherical quadrature amplitude constellation, as displayed in a multi-dimensional complex plane, is bounded by a surface comprising all symbol points at a predetermined distance from a center point and coincident with the intersection of at least two axes, and exhibiting correspondence in relative position of the symbol points on opposite sides of the at least two axes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.