Title :
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
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;
Conference_Titel :
Mixed-Signal Design, 2000. SSMSD. 2000 Southwest Symposium on
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-5975-5
DOI :
10.1109/SSMSD.2000.836467
