Abstract
In orthogonal frequency division multiplexing systems, significant inter-carrier interference (ICI) caused by doubly selective channels make challenge for reliable reception. In this paper, channel estimation and ICI cancellation are considered jointly. Relying on the basis expansion model (BEM) of time-varying channel, the linear system model of transceiver is established, and the corresponding joint optimization of the transmitted data and BEM coefficients is formulated. Due to the separability of the data and BEM coefficients, we use cyclic minimizing technique to perform channel estimation and equalization alternately. This yields a linear minimum mean square-error (LMMSE) channel estimator and a block MMSE equalizer respectively. The block MMSE equalizer has complexity O(N 3), where N is the number of data subcarriers. To reduce the complexity, instead of equalizing all the data simultaneously, we consider estimating each data symbol successively. This idea results in the per subcarrier interference canceller with lower complexity O(N 2). Finally, an iterative receiver consisting of the data-aided LMMSE channel estimator and the successive interference canceller is developed. Simulation results show the scheme is effective over the channel with relatively large Doppler spread.
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Li Y., Cimini L. J. (2001) Bounding on the interchannel interference of OFDM in time-varying impairments. IEEE Transactions on Communications 49(3): 401–404
Russell, M., & Stuber, G. L. (1995). Interchannel interference analysis of OFDM in a mobile environment. In Proceedings of VTC’95 (pp. 820–824). July.
Jeon W. G., Chang K., Cho Y. S. (1999) An equalization technique for orthogonal frequency-division multiplexing systems in time-variant multipath channels. IEEE Transactions on Communications 47(1): 27–32
Choi Y.-S., Voltz P. J., Cassara Frank A. (2001) On channel estimation and detection for multicarrier signals in fast and selective rayleigh fading channels. IEEE Transactions on Communications 49(8): 1375–1387
Cai X., Giannakis G. B. (2003) Bounding performance and suppressing intercarrier interference in wireless mobile OFDM. IEEE Transactions on Communications 51(12): 2047–2056
Schniter P. (2004) Low-complexity equalization of OFDM in doubly selective channels. IEEE Transactions on Signal Processing 52(4): 1002–1011
Gorokhov A., Linnartz J.-P. (2004) Robust OFDM receivers for dispersive time-varying channels: Equalization and channel acquisition. IEEE Transactions on Communications 52(4): 572–583
Tomasin S., Gorokhov A., Yang H., Linnartz J.-P. (2005) Iterative interference cancellation and channel estimation for mobile OFDM. IEEE Transactions on Wireless Communications 4(1): 238–245
Bourdoux, A., Horlin, F., Lopez-Estraviz, E., & Van der Perre, L. (2006). Practical channel estimation for OFDM in time-varying channels. In Proceedings of IEEE Global Telecommunications Conference. November 2006.
Tang Z., Cannizzaro R. C., Leus G., Banelli P. (2007) Pilot-assisted time-varying channel estimation for OFDM systems. IEEE Transactions Signal Processing 55(5): 2226–2238
Stoica P., Selén Y. (2004) Cyclic minimizers, majorization techniques, and the expectation- maximization algorithm: A refresher. IEEE Signal Processing Magazine 21(1): 112–114
Teo, K. A. D., & Ohno S. (2006). Pilot-aided channel estimation and Viterbi equalization for OFDM over doubly-slective channel. In Proceedings of IEEE Global Telecommunications Conference. November.
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Hou, W., Ye, W., Feng, S. et al. Iterative Channel Estimation and Successive ICI Cancellation for OFDM Systems over Doubly Selective Channels. Wireless Pers Commun 55, 289–303 (2010). https://doi.org/10.1007/s11277-009-9802-4
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DOI: https://doi.org/10.1007/s11277-009-9802-4