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Blind Carrier-Frequency Offset Estimation in SISO, MIMO, and Multiuser OFDM Systems

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Blind Carrier-Frequency Offset Estimation in SISO, MIMO, and Multiuser OFDM Systems Relying on a kurtosis-type criterion, we develop a low-complexity blind carrier-frequency offset (CFO) estimator for orthogonal frequency-division multiplexing (OFDM) systems. We demonstrate analytically how identifiability and performance of this blind CFO estimator depend on the channel's frequency selectivity and the input distribution. We show that this approach can be applied to blind CFO estimation in multi-input/multi-output and multiuser OFDM systems. The issues of channel nulls, multiuser interference, and effect of multiple antennas are addressed analytically, and tested via simulations.

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Communications, IEEE Transactions on  (Volume:52 ,  Issue: 10 )