Full-duplex MIMO-OFDM systems with imperfect estimation of CFO and time-varying multipath channels

• Published in: Electronics letters Vol. 56; no. 25; pp. 1425 - 1428
• Main Authors: Nguyen-Le, H, Nguyen-Duy-Nhat, V, Bao, V.N.Q, Bui-Thi-Minh, T, Tran, N.H
• Format: Journal Article
• Language: English
• Published: The Institution of Engineering and Technology 10.12.2020
• Subjects: Bayes methods; carrier frequency; channel estimation; data‐detection; duplex MIMO‐OFDM systems; error statistics; FD orthogonal frequency division multiplexing systems; full‐duplex communication; imperfect estimation; iterative estimation; maximum‐a‐posteriori‐based; mean square error methods; MIMO communication; multipath channels; next‐generation wireless systems; OFDM modulation; perfect channel estimation; pilot‐aided algorithm; related Bayesian Cramér Rao; related benchmark limits; reliable system performance; significant spectral efficiency enhancement; synchronisation; time variation; time‐varying channels; time‐varying multipath channels; time‐varying multiple‐input multiple‐output multipath channel responses; wireless channels; Wireless communications; imperfect estimation; duplex MIMO-OFDM systems; significant spectral efficiency enhancement; pilot-aided algorithm; time-varying channels; time-varying multipath channels; full-duplex communication; reliable system performance; OFDM modulation; wireless channels; mean square error methods; data-detection; MIMO communication; error statistics; iterative estimation; related Bayesian Cramér Rao; time variation; perfect channel estimation; carrier frequency; multipath channels; synchronisation; FD orthogonal frequency division multiplexing systems; channel estimation; maximum-a-posteriori-based; Bayes methods; related benchmark limits; time-varying multiple-input multiple-output multipath channel responses; next-generation wireless systems
• ISSN: 0013-5194; 1350-911X; 1350-911X
• DOI: 10.1049/el.2020.2421

This Letter proposed a maximum-a-posteriori-based, pilot-aided algorithm for iterative estimation of carrier frequency offset (CFO) and time-varying multiple-input multiple-output (MIMO) multipath channel responses in FD orthogonal frequency division multiplexing (OFDM) systems. Empirical results and related benchmark limits show that the proposed algorithm offers reliable system performance having (i) estimation's mean-squared errors close to related Bayesian Cramér Rao bounds, (ii) data-detection's bit-error rates close to the ideal values under the assumption of perfect channel estimation and synchronisation and (iii) high robustness against the time variation of wireless channels in a network with moving nodes.