RF microelectronics
OFDM link performance analysis under various receiver impairments
EURASIP Journal on Wireless Communications and Networking - Multicarrier Systems
RF Imperfections in High-rate Wireless Systems: Impact and Digital Compensation
RF Imperfections in High-rate Wireless Systems: Impact and Digital Compensation
IEEE Transactions on Signal Processing
Orthogonal Frequency Division Multiplexing for Wireless Communications
Orthogonal Frequency Division Multiplexing for Wireless Communications
Independent component analysis based semi-blind I/Q imbalance compensation for MIMO OFDM systems
IEEE Transactions on Wireless Communications
IQ-Imbalance Compensation for OFDM in the Presence of IBI and Carrier-Frequency Offset
IEEE Transactions on Signal Processing
Generalized sliding FFT and its application to implementation ofblock LMS adaptive filters
IEEE Transactions on Signal Processing
IEEE Transactions on Signal Processing
Digital Compensation of I/Q Imbalance Effects in Space-Time Coded Transmit Diversity Systems
IEEE Transactions on Signal Processing
MIMO OFDM Receivers for Systems With IQ Imbalances
IEEE Transactions on Signal Processing
Equalization for OFDM over doubly selective channels
IEEE Transactions on Signal Processing
Analog Impairments in MIMO-OFDM Systems
IEEE Transactions on Wireless Communications
Joint compensation of transmitter and receiver impairments in OFDM systems
IEEE Transactions on Wireless Communications
Orthogonal multiple access over time- and frequency-selective channels
IEEE Transactions on Information Theory
Impacts of I/Q imbalance on QPSK-OFDM-QAM detection
IEEE Transactions on Consumer Electronics
A novel IQ imbalance compensation scheme for the reception of OFDM signals
IEEE Transactions on Consumer Electronics
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Multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM), as a viable technique, is being widely considered for high data rate and bandwidth efficient wireless communications. However, analog impairments like in-phase/quadrature (IQ) imbalance decrease the performance of this technique. Furthermore, time variations of a doubly selective channel cause intercarrier interference (ICI) which again degrades the performance. In this paper, the digital compensation of both the transmitter and the receiver IQ imbalances in MIMO-OFDM transmission over doubly selective channels is studied. In particular, basis expansion model is employed to develop a novel IQ formulation for a time-varying channel. Using this formulation, two receiver schemes are suggested to jointly mitigate the IQ imbalance and channel time variation effects. In deriving one of these schemes, the general case of an insufficient cyclic prefix (CP) for OFDM modulation is also considered. An insufficient CP results in interblock interference (IBI). The proposed approach for insufficient CP case, unifies several existing methods for IQ imbalance compensation and IBI/ICI cancellation. Simulation results show that this approach considerably improves the achievable bit-error-rate performance.