A digital method for the correction of I/Q phase errors in complex sub-sampling mixers

Author

Pun, Kong-Pang ; Franca, J.E. ; Azeredo-Leme, C.

Author_Institution

Centre for Microsyst., Inst. Superior Tecnico, Lisbon, Portugal

fYear

2000

fDate

2000

Firstpage

171

Lastpage

174

Abstract

Complex sub-sampling mixers are used in various kinds of image rejection receiver. The image rejection performance of these receivers is mainly limited by I/Q phase error. A digital calibration technique is proposed in this paper to correct this error. The phase error is measured by a statistical method with a local test signal, and is corrected in the baseband digital domain. With this method, the image rejection performance can be improved as much as 20 dB as indicated by high level simulation results

Keywords

calibration; error correction; mixed analogue-digital integrated circuits; mixers (circuits); phase measurement; radio receivers; signal sampling; I/Q phase error correction; baseband digital domain; complex sub-sampling mixers; digital calibration technique; digital method; image rejection performance improvement; image rejection receiver; local test signal; statistical method; Baseband; Calibration; Error correction; Filters; Frequency; GSM; Phase estimation; Phase measurement; Statistical analysis; Testing;

fLanguage

English

Publisher

ieee

Conference_Titel

Mixed-Signal Design, 2000. SSMSD. 2000 Southwest Symposium on

Conference_Location

San Diego, CA

Print_ISBN

0-7803-5975-5

Type

conf

DOI

10.1109/SSMSD.2000.836467

Filename

836467