OFDM blind carrier offset estimation: ESPRIT |
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Authors: | Tureli U. Liu H. Zoltowski M.D. |
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Affiliation: | Dept. of Electr. Eng., Washington Univ., Seattle, WA; |
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Abstract: | In orthogonal frequency-division multiplex (OFDM) communications, the loss of orthogonality due to the carrier-frequency offset must be compensated before discrete Fourier transform-based demodulation can be performed. This paper proposes a new carrier offset estimation technique for OFDM communications over a frequency-selective fading channel. We exploit the intrinsic structure information of OFDM signals to derive a carrier offset estimator that offers the accuracy of a super resolution subspace method, ESPRIT |
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