Analysis of new and existing methods of reducing intercarrier interference due to carrier frequency offset in OFDM

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Abstract

Orthogonal frequency division multiplexing (OFDM) is very sensitive to frequency errors caused by frequency differences between transmitter and receiver local oscillators. In this paper, this sensitivity is analyzed in terms of the complex weighting coefficients which give the contribution of each transmitter subcarrier to each demodulated subcarrier. Previously described windowing and self-intercarrier interference (ICI) cancellation methods are analyzed in terms of these weighting coefficients. New ICI cancellation schemes with very much improved performance are described. A condition for orthogonality of windowing schemes is derived in terms of the discrete Fourier transform (DFT) of the windowing function.

Original languageEnglish
Pages (from-to)365-369
Number of pages5
JournalIEEE Transactions on Communications
Volume47
Issue number3
DOIs
Publication statusPublished - 1 Jan 1999

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