Title :
Blind Adaptive Compensation of I/Q Mismatch and Frequency Offset in Low-IF Receivers
Author :
Abrar, Shafayat ; Zerguine, Azzedine ; Nandi, Asoke K.
Author_Institution :
Dept. of Electr. Eng., COMSATS Inst. of Inf. Technol., Islamabad, Pakistan
Abstract :
In this work, we present an adaptive non-data-aided compensator for the in-phase/quadrature-phase (I/Q) mismatch in low-intermediate frequency (heterodyne) receivers. In particular, the adaptive I/Q mismatch algorithm is derived by exploiting the uncorrelatedness between the desired and the image signals, and is used to compensate for gain imbalance and phase-offset error. Furthermore, the frequency-offset error is separately compensated by using an adaptive minimization of a fourth-order statistics based cost function.
Keywords :
adaptive signal detection; correlation methods; heterodyne detection; radio receivers; adaptive I/Q mismatch algorithm; adaptive minimization; adaptive nondata aided compensator; blind adaptive compensation; fourth order statistics based cost function; frequency offset error; heterodyne receiver; in-phase-quadrature-phase mismatch; low intermediate frequency receiver; Adaptation models; Convergence; Estimation; Frequency estimation; Optimized production technology; Receivers; Signal processing algorithms; I/Q imbalance; adaptive decorrelation; adaptive filter; blind calibration; fourth-order statistics; frequency-offset recovery; low-IF;
Conference_Titel :
Frontiers of Information Technology (FIT), 2014 12th International Conference on
Print_ISBN :
978-1-4799-7504-4
DOI :
10.1109/FIT.2014.32
