Patent · US Active

Hierarchical and adaptive multi-carrier digital modulation and demodulation

US9438394B2 · kind B2 · utility

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0References

14Claims

0Family size

Assignee

Alcatel Lucent · FR

Inventors

Dirk Vanderhaegen · Wemmel, BE
Danny Van Bruyssel · Bonheiden, BE
Jochen Maes · Veerle, BE
Koen De Schepper · Mortsel, BE
Michael Timmers · Herent, BE

Key dates

Filing date	Oct 9, 2012
Grant date	Sep 6, 2016
Priority date	—
Expiry date	Feb 1, 2033

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02D30/50
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

In an embodiment the method includes, at a transmit side, grouping carriers into carrier groups, and selecting a group constellation diagram for modulation of the carriers of a given carrier group. The selected group constellation diagram is built as a hierarchical sum of I super-imposed constellations vectors having predefined decreasing powers with the P strongest and the Q weakest constellation vectors being omitted. The carriers of the carrier group are modulated by means of the selected group constellation diagram, and P and/or Q parameters per carrier group and per multi-carrier data symbol are adjusted.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.