Patent · US Expired

Method of noise cancellation in a signal generated by discrete multi-tone modulation and circuit for carrying out said method

US7031410B1 · kind B1 · utility

3Cited by

9References

12Claims

0Family size

Assignee

Infineon Technologies AG · DE

Inventors

Heinrich Schenk · Munich, DE
Stefan Schneider · Aachen, DE
Dietmar Straeussnigg · Villach, AT

Key dates

Filing date	Mar 1, 2000
Grant date	Apr 18, 2006
Priority date	—
Expiry date	Mar 1, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH04L2025/03796
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

The invention relates to a method of canceling noise in a signal generated by discrete multi-tone modulation. The noise is caused primarily by the transient of a transmission channel via which the signal is transmitted. The signal comprises a plurality of symbols each of which is preceded by a cyclic prefix. According to the invention, a plurality of parameters is calculated from the digitized sample values of the signal and the approximate transient of the transmission channel is calculated from said plurality of parameters. To cancel the noise the approximately calculated transient is subtracted from the digitized sample values.

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