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
IEEE Transactions on Signal Processing
Channel estimation in the presence of transmitter and receiver I/Q mismatches for OFDM systems
IEEE Transactions on Wireless Communications
Effect of I/Q imbalance on pilot design for MIMO OFDM channel estimation
GLOBECOM'09 Proceedings of the 28th IEEE conference on Global telecommunications
Pilot designs for channel estimation of MIMO OFDM systems with frequency-dependent I/Q imbalances
IEEE Transactions on Communications
Independent component analysis based semi-blind I/Q imbalance compensation for MIMO OFDM systems
IEEE Transactions on Wireless Communications
IEEE Transactions on Wireless Communications
Efficient compensation of transmitter and receiver IQ imbalance in OFDM systems
EURASIP Journal on Advances in Signal Processing
Journal of Electrical and Computer Engineering - Special issue on Implementations of Signal-Processing Algorithms for OFDM Systems
Wireless Personal Communications: An International Journal
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The implementation of OFDM-based systems suffers from impairments such as in-phase and quadrature-phase (IQ) imbalances in the front-end analog processing. Such imbalances are caused by the analog processing of the radio frequency (RF) signal and can be present at both the transmitter and receiver. The resulting IQ distortion limits the achievable operating SNR at the receiver and the achievable data rates. In this paper, the effect of both the transmitter and receiver IQ imbalances in an OFDM system is studied and algorithms are developed to compensate for such distortions in the digital domain. The algorithms include post-FFT least-squares and adaptive equalization, as well as a pre-distortion scheme at the transmitter and a pre-FFT correction at the receiver