naa a22 4500 51079419X CHVBK 20180411083330.0 cr unu---uuuuu 180411e20130501xx s 000 0 eng 10.1007/s11277-012-0707-2 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0707-2 Joint Compensation of Transmitter and Receiver IQ Imbalance for MIMO-OFDM Over Doubly Selective Channels [Elektronische Daten] [Mojtaba Beheshti, Mohammad Omidi, Ali Doost-Hoseini] 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. Springer Science+Business Media, LLC., 2012 In-phase/quadrature (IQ) imbalance nationallicence Multiple-input multiple-output (MIMO) nationallicence Orthogonal frequency division multiplexing (OFDM) nationallicence Doubly selective channel nationallicence Compensation nationallicence Beheshti Mojtaba Information and Communication Technology Institute, Isfahan University of Technology, Esfahän, Iran aut Omidi Mohammad Department of Electrical and Computer Engineering, Isfahan University of Technology, Esfahän, Iran aut Doost-Hoseini Ali Department of Electrical and Computer Engineering, Isfahan University of Technology, Esfahän, Iran aut Wireless Personal Communications Springer US; http://www.springer-ny.com 70/2(2013-05-01), 537-559 0929-6212 70:2<537 2013 70 11277 https://doi.org/10.1007/s11277-012-0707-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0707-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Beheshti Mojtaba Information and Communication Technology Institute, Isfahan University of Technology, Esfahän, Iran aut NATIONALLICENCE 700 1- Omidi Mohammad Department of Electrical and Computer Engineering, Isfahan University of Technology, Esfahän, Iran aut NATIONALLICENCE 700 1- Doost-Hoseini Ali Department of Electrical and Computer Engineering, Isfahan University of Technology, Esfahän, Iran aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 70/2(2013-05-01), 537-559 0929-6212 70:2<537 2013 70 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer