Patent · US Expired

Pre-distortion for a non-linear transmission path in the high frequency range

US6314142A · kind A · utility

42Cited by

7References

14Claims

0Family size

Assignee

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

Inventors

Rainer Perthold · Weisendorf, DE
Heinz Gerhauser · Waischenfeld, DE

Key dates

Filing date	Oct 20, 1999
Grant date	Nov 6, 2001
Priority date	—
Expiry date	Oct 20, 2019

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2201/3233
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

A circuit for predistorting a signal to be transmitted via a non-linear channel comprises an envelope detector for detecting an envelope of the signal. A quantization for forming quantized envelope values on the basis of the detected envelope is connected to the envelope detector as well as to a table for supplying complex predistortion coefficients which depend on the quantized envelope values and on a previously detected transmission function of the non-linear channel. An evaluation circuit separated from the non-linear channel and used for the complex evaluation of the signal to be transmitted via the non-linear channel with the complex predistortion coefficients permits the distortion introduced by the non-linear channel to be substantially compensated according to amount and phase.

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