Patent · US Active

Frequency selective IQ correction

US8588353B2 · kind B2 · utility

3Cited by

3References

11Claims

0Family size

Assignee

TEXAS INSTRUMENTS INCORPORATED · US

Inventors

Zigang Yang · Plano, US
Lars Jorgensen · Folsom, US
Lei Ding · Plano, US

Key dates

Filing date	Apr 1, 2011
Grant date	Nov 19, 2013
Priority date	—
Expiry date	Sep 12, 2031

Classification

Technology area (CPC H)Electricity
CPC primaryH03F2200/336
WIPO fieldBasic communication processes
WIPO sectorElectrical engineering

Abstract

In conventional radio frequency (RF) systems, transmitters will usually convert baseband signals to RF so as to be transmitted. As part of the conversion process, the transmitters will perform digital predistortion (DPD), which uses feedback from a power amplifier. However, there are usually mismatches between the in-phase (I) and quadrature (Q) paths within with feedback loop. Traditional IQ correction filters were ineffective at providing adequate compensation for these mismatches, but here a filter is provided that provides adequate out-of-band compensation by use of frequency selectivity.

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