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

Abstract

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.