Online calibration of quadrature low-IF receivers

Ernest Seagraves, Bruce Walcott

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

2 Scopus citations


In theory the quadrature low-IF receiver topology eliminates image filters required by the heterodyne topology. In practice analog component mismatch between the I/Q signal paths allows image energy to leak into the desired signal, limiting performance. Existing compensation techniques fall into three categories: offline, signal specific, and blind. In this paper a scheme is proposed that continually injects a calibration signal into the image band at the input of the receiver. This scheme allows the mismatched low-IF receiver system to be calibrated without taking it offline, without signal specific knowledge, and without the performance limits of blind techniques.

Original languageEnglish
Title of host publicationISCAS 2006
Subtitle of host publication2006 IEEE International Symposium on Circuits and Systems, Proceedings
Number of pages4
StatePublished - 2006
EventISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems - Kos, Greece
Duration: May 21 2006May 24 2006

Publication series

NameProceedings - IEEE International Symposium on Circuits and Systems
ISSN (Print)0271-4310


ConferenceISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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