Patent · US Active

Using fractional delay computations to improve intermodulation performance

US9755583B2 · kind B2 · utility

0Cited by

10References

19Claims

0Family size

Assignee

NOKIA SOLUTIONS AND NETWORKS OY · FI

Inventors

Shavantha Kularatna · Dallas, US
Christian Reichl · Hirschau, DE
Bjoern Jelonnek · Ulm, DE
Alan Pereira · Irving, US
Glenn Schedeen · Corinth, US
Sandeep Mehta · Beverly, US

Key dates

Filing date	Oct 1, 2014
Grant date	Sep 5, 2017
Priority date	—
Expiry date	Oct 1, 2034

Classification

Technology area (CPC H)Electricity
CPC primaryH04B2001/045
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

Enhancing the intermodulation performance of an RF power amplifier by determining a coarse time delay represented by an integer TI; determining a reference point for a transmitted signal waveform of the RF power amplifier; shifting the waveform by a set of offsets including a plurality of non-integer fractional steps; correlating the transmitted signal waveform with a feedback signal waveform to obtain a respective correlation value for each of corresponding fractional steps; obtaining an accurate fractional delay value by selecting a fractional step having a highest respective correlation value; applying the obtained correct fractional delay value to the transmitted signal waveform to provide a compensated transmitted signal waveform and combining the compensated transmitted signal waveform with the feedback signal waveform to reduce at least one intermodulation product of the RF power amplifier.

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