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Cyclic prefixed OQAM-OFDM and its application to single-carrier FDMA

Gao, X. Q., Wang, W., Xia, X.-G., Au, E. K. S. and You, X. (2011) Cyclic prefixed OQAM-OFDM and its application to single-carrier FDMA. IEEE Transactions on Communications, 59 (5). pp. 1467-1480. ISSN 0090-6778

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To link to this item DOI: 10.1109/TCOMM.2011.031611.100045

Abstract/Summary

Single-carrier frequency division multiple access (SC-FDMA) has appeared to be a promising technique for high data rate uplink communications. Aimed at SC-FDMA applications, a cyclic prefixed version of the offset quadrature amplitude modulation based OFDM (OQAM-OFDM) is first proposed in this paper. We show that cyclic prefixed OQAMOFDM CP-OQAM-OFDM) can be realized within the framework of the standard OFDM system, and perfect recovery condition in the ideal channel is derived. We then apply CP-OQAMOFDM to SC-FDMA transmission in frequency selective fading channels. Signal model and joint widely linear minimum mean square error (WLMMSE) equalization using a prior information with low complexity are developed. Compared with the existing DFTS-OFDM based SC-FDMA, the proposed SC-FDMA can significantly reduce envelope fluctuation (EF) of the transmitted signal while maintaining the bandwidth efficiency. The inherent structure of CP-OQAM-OFDM enables low-complexity joint equalization in the frequency domain to combat both the multiple access interference and the intersymbol interference. The joint WLMMSE equalization using a prior information guarantees optimal MMSE performance and supports Turbo receiver for improved bit error rate (BER) performance. Simulation resultsconfirm the effectiveness of the proposed SC-FDMA in termsof EF (including peak-to-average power ratio, instantaneous-toaverage power ratio and cubic metric) and BER performances.

Item Type:Article
Refereed:Yes
Divisions:Faculty of Science
ID Code:31757
Uncontrolled Keywords:Orthogonal frequency division multiplexing (OFDM), single-carrier frequency division multiple access (SCFDMA), frequency domain equalization, widely linear processing, envelope fluctuation.
Publisher:IEEE

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