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Pilot-assisted maximum-likelihood frequency-offset estimation for OFDM systems

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Academic year: 2021

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Fig. 1. (a) Short pilot symbol sequence of the IEEE 802.11a. (b) Symbol arrangement and definitions of the proposed ML estimate.
Fig. 2. Normalized log-likelihood spectrum and the associated root distribution where the spectrum is normalized by the noiseless mainlobe peak value; CFO = 1:2 subcarrier spacings.
Fig. 3. (a) Averaged estimation values for various CFO estimates. (b) MSE performance of CFO estimates; K = 8, and true CFO = 0:48 subcarrier spacings.
Fig. 5. MSE performance of CFO estimates; K = 4, and true CFO = 0:94 subcarrier spacings.
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