Fast dichotomic supervised I/Q imbalance compensation algorithm

A fast I/Q imbalance compensation algorithm is presented. It is demonstrated through MATLAB simulations that with a few samples an image-to-signal ratio (ISR) lower than −25 dB was achieved. On the basis of digital processing of the received signal, this algorithm is compliant with low-cost and low-complexity wireless receivers because it does not require extra time and resources for calibration. Moreover, its fast convergence allows reaching a high enough image rejection ratio by adapting the compensation weight during the reception of a known preamble such as defined by the IEEE 802.15.4 or the Bluetooth low energy standards.

[1]  G. Fettweis,et al.  Blind I/Q imbalance parameter estimation and compensation in low-IF receivers , 2004, First International Symposium on Control, Communications and Signal Processing, 2004..

[2]  Mikko Valkama,et al.  Advanced methods for I/Q imbalance compensation in communication receivers , 2001, IEEE Trans. Signal Process..

[3]  J.P.F. Glas,et al.  Digital I/Q imbalance compensation in a low-IF receiver , 1998, IEEE GLOBECOM 1998 (Cat. NO. 98CH36250).

[4]  Y. H. Lee,et al.  Non-Data-Aided Approach to I/Q Mismatch Compensation in Low-IF Receivers , 2007, IEEE Transactions on Signal Processing.

[5]  John W. Pierre,et al.  Quadrature receiver mismatch calibration , 1999, IEEE Trans. Signal Process..