Decision-directed channel estimation and high I/Q imbalance compensation in OFDM receivers
IEEE Transactions on Communications
Analysis and compensation of transmitter IQ imbalances in OFDMA and SC-FDMA systems
IEEE Transactions on Signal Processing
IEEE Transactions on Wireless Communications
An I/Q imbalance estimation and compensation strategy for 3GPP LTE systems
RWS'09 Proceedings of the 4th international conference on Radio and wireless symposium
On the effect of I/Q imbalance on MIMO transmit-receive diversity systems
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Pilot designs for channel estimation of OFDM systems with frequency-dependent I/Q imbalances
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Joint compensation of IQ imbalance and phase noise in OFDM wireless systems
IEEE Transactions on Communications
WiCOM'09 Proceedings of the 5th International Conference on Wireless communications, networking and mobile computing
Exploiting the diversity gain of transmitter I/Q imbalance in single-antenna OFDM systems
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Effect of I/Q imbalance on pilot design for MIMO OFDM channel estimation
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Low-complexity OFDM channel estimation in the presence of I/Q imbalance and phase noise
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Optimal Pilot Power Allocation for OFDM Systemswith Transmitter and Receiver IQ Imbalances
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Effect of imperfect channel estimation in I/Q imbalanced OFDM system
Proceedings of the 6th International Wireless Communications and Mobile Computing Conference
Joint estimation of I/Q imbalance, CFO and channel response for MIMO OFDM systems
IEEE Transactions on Communications
Analysis and compensation of I/Q imbalance in MIMO transmit-receive diversity systems
IEEE Transactions on Communications
Joint transmitter and receiver IQ imbalance estimation and compensation for OFDM systems
RWS'10 Proceedings of the 2010 IEEE conference on Radio and wireless symposium
Blind frequency-dependent I/Q imbalance compensation for direct-conversion receivers
IEEE Transactions on Wireless Communications
Pilot designs for channel estimation of MIMO OFDM systems with frequency-dependent I/Q imbalances
IEEE Transactions on Communications
IQ gain imbalance measurement for OFDM based wireless communication systems
MILCOM'06 Proceedings of the 2006 IEEE conference on Military communications
IEEE Transactions on Wireless Communications
Addressing challenges of software radio
ICOSSE'06 Proceedings of the 5th WSEAS international conference on System science and simulation in engineering
Journal of Electrical and Computer Engineering - Special issue on Implementations of Signal-Processing Algorithms for OFDM Systems
Wireless Personal Communications: An International Journal
An analytical technique for characterization of transceiver IQ imbalances in the loop-back mode
DATE '12 Proceedings of the Conference on Design, Automation and Test in Europe
Carrier Frequency Offset and I/Q Imbalance Compensation for MB-OFDM Based UWB System
Wireless Personal Communications: An International Journal
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The implementation of orthogonal frequency division multiplexing (OFDM)-based physical layers suffers from the effect of In-phase and Quadrature-phase (IQ) imbalances in the front-end analog processing. The IQ imbalances can severely limit the achievable operating signal-to-noise ratio (SNR) at the receiver and, consequently, the supported constellation sizes and data rates. In this paper, the effect of IQ imbalances on OFDM receivers is studied, and system-level algorithms to compensate for the distortions are proposed. The algorithms include post-fast Fourier transform (FFT) least-squares and least mean squares (LMS) equalization, as well as pre-FFT correction using adaptive channel/distortion estimation and special pilot tones to enable accurate and fast training. Bounds on the achievable performance of the compensation algorithms are derived and evaluated as a function of the physical distortion parameters. A motivation is included for the physical causes of IQ imbalances and for the implications of the approach presented in this paper on designing and implementing wireless transceivers.