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

Previous work 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 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.