Patent · US Active

Quadrature amplitude modulation with constellation shaping

US11483076B2 · kind B2 · utility

0Cited by

6References

20Claims

0Family size

Assignee

Cisco Technology, Inc. · US

Inventors

Andreas Bisplinghoff · Forchheim, DE
Stefan Helmut Müller-Weinfurtner · Wendelstein, DE

Key dates

Filing date	Jul 13, 2021
Grant date	Oct 25, 2022
Priority date	—
Expiry date	Jul 13, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH03M13/2933
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

Techniques are presented for mapping a digital data sequence into a signal point sequence for transmission. The signal point sequence belongs to a set of possible signal point sequences. In one example, a digital data sequence is received. Forbidden branch flags that forbid certain signal points in the possible signal points sequences are applied. The signal point sequence is selected from a subset of all the possible signal point sequences based on the digital data sequence. The subset is defined by the forbidden branch flags.

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