Simple design of detector in the presence of frequency offset for IEEE 802.15.4 LR-WPANs
IEEE Transactions on Circuits and Systems II: Express Briefs
Parameter Estimation for Correlated MIMO Channels with Frequency-Selective Fading
Wireless Personal Communications: An International Journal
Joint estimation of I/Q imbalance, CFO and channel response for MIMO OFDM systems
IEEE Transactions on Communications
Coordinated multi-cell systems: carrier frequency offset estimation and correction
IEEE Journal on Selected Areas in Communications - Special issue on cooperative communications in MIMO cellular networks
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This contribution deals with carrier frequency offset estimation for flat-fading multiple-input multiple-output (MIMO) channels. Both data-aided (using training symbols) and iterative code-aided (using the unknown coded symbols) estimation is considered. In both scenarios, maximum-likelihood (ML) frequency offset estimation involves solving a maximization problem with no closed-form solution. Since numerical calculation of the ML estimates is computationally hard, we derive a simple closed-form approximation. Simulation results indicate that the ML algorithm and the proposed reduced-complexity algorithm operate closely to the Cramer-Rao bound (CRB)