Patent · US Expired

Device and method for predistorting a transmission signal to be transmitted via a nonlinear transmission path

US7170951B1 · kind B1 · utility

10Cited by

13References

17Claims

0Family size

Assignee

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

Inventors

Rainer Perthold · Weisendorf, DE
Maximilian Hofman · Erlangen, DE
Ingo Rogalsky · Erlangen, DE
Heinz Gerhafuser · Waischenfeld, DE

Key dates

Filing date	May 19, 2000
Grant date	Jan 30, 2007
Priority date	—
Expiry date	May 19, 2020

Classification

Technology area (CPC H)Electricity
CPC primaryH04L27/2614
WIPO fieldDigital communication
WIPO sectorElectrical engineering

Abstract

A device for predistorting a transmission signal to be transmitted over a nonlinear transmission path comprises an estimator for determining an error signal depending on the transmission signal and a previously registered transfer characteristic of the nonlinear transmission path. The error signal represents an estimate of an error generated due to the nonlinearity of the trans-mission path. A time-dispersive element is provided to produce a correction signal by a temporal extension of the error signal. A combiner is provided to combine the transmission signal and the correction signal. As a result of the temporal extension of the error signal, an error signal segment in the frequency spectrum of a transmission signal transmitted by the nonlinear transmission path is shifted away from the useful frequency range of the transmission signal.

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