Baseband estimation and compensation of joint TX/RX I/Q imbalance in SC-FDE transceivers

Previous work [1] on I/Q imbalance in SC-FDE transceivers investigates the effect of receiver I/Q imbalance but does not consider Doppler effects due to mobility. SCFDE in doubly-selective channels is studied in [2] and [3] but without considering I/Q imbalance. In this paper, we derive an equivalent channel model for SC-FDE in the presence of both joint Tx/Rx I/Q imbalance and mobility and present an effective low-complexity digital baseband compensation scheme. Furthermore, we propose a novel joint channel and I/Q imbalance parameter estimation scheme for SC-FDE transceivers.

[1]  Steven Kay,et al.  Fundamentals Of Statistical Signal Processing , 2001 .

[2]  David Falconer,et al.  Frequency domain equalization for single-carrier broadband wireless systems , 2002, IEEE Commun. Mag..

[3]  P. Schniter,et al.  Iterative frequency-domain equalization for single-carrier systems in doubly-dispersive channels , 2004, Conference Record of the Thirty-Eighth Asilomar Conference on Signals, Systems and Computers, 2004..

[4]  Donald C. Cox,et al.  ICI mitigation for pilot-aided OFDM mobile systems , 2005, IEEE Transactions on Wireless Communications.

[5]  Jeng-Kuang Hwang,et al.  Adaptive Baseband Compensation for I/Q Imbalance and Time-Varying Channel in OFDM System , 2006, 2006 International Symposium on Intelligent Signal Processing and Communications.

[6]  Ali H. Sayed,et al.  Joint compensation of transmitter and receiver impairments in OFDM systems , 2007, IEEE Transactions on Wireless Communications.

[7]  F. Horlin,et al.  Comparison of the sensitivity of OFDM and SC-FDE to CFO, SCO and IQ imbalance , 2008, 2008 3rd International Symposium on Communications, Control and Signal Processing.

[8]  Naofal Al-Dhahir,et al.  Coherent and Differential ICI Cancellation for Mobile OFDM with Application to DVB-H , 2008, IEEE Transactions on Wireless Communications.

[9]  R. Kalbasi,et al.  Single-carrier frequency domain equalization , 2008, IEEE Signal Processing Magazine.

[10]  Hlaing Minn,et al.  Digital Baseband Compensation of I/Q Imbalance in Mobile OFDM , 2008, 2008 IEEE Wireless Communications and Networking Conference.