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Estimation of carrier frequency offset with I/Q mismatch using pseudo offset injection in OFDM systems

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Fig. 3. CFO estimation by two-repeat preamble-based method under 19-dB SNR.
Fig. 4 shows the inverse cosine (arccosine) function for real element of in the domain [ , 1]
Fig. 7. CFO estimation by the two-repeat preamble-based method.
Fig. 10. Mean square error (MSE) of frequency estimation versus SNR under different I/Q imbalance conditions with 50 ppm CFO.
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