Patent · US Expired

Differential coding and carrier recovery for multicarrier systems

US6931084B1 · kind B1 · utility

8Cited by

14References

16Claims

0Family size

Assignee

Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

Ernst Eberlein · Erlangen, DE
Sabah Badri · Erlangen, DE
Stefan Lipp · Bad Liebenzell, DE
Stephan Buchholz · Munich, DE
Albert Heuberger · Erlangen, DE
Heinz Gerhaeuser · Erlangen, DE
Robert Fischer · Erlangen, DE

Key dates

Filing date	Apr 14, 1998
Grant date	Aug 16, 2005
Priority date	—
Expiry date	Apr 14, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH04L27/2679
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A method of performing an echo phase offset correction in a multi-carrier demodulation system involves the step of differential phase decoding phase shifts based on a phase difference between simultaneous carriers having different frequencies. An echo phase offset is determined for each decoded phase shift by eliminating phase shift uncertainties related to the transmitted information from the decoded phase shift. The echo phase offsets are averaged in order to generate an averaged offset. Finally, each decoded phase shift is corrected based on the averaged offset.

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