TY - GEN
T1 - Online calibration of quadrature low-IF receivers
AU - Seagraves, Ernest
AU - Walcott, Bruce
PY - 2006
Y1 - 2006
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:34547313565
SN - 0780393902
SN - 9780780393905
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 5191
EP - 5194
BT - ISCAS 2006
T2 - ISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems
Y2 - 21 May 2006 through 24 May 2006
ER -