Estimation of time-varying channels for pilot-assisted OFDM systems

doi:1005-8885 (2007) 02-0094-05

中国邮电高校学报(英文) ›› 2007, Vol. 14 ›› Issue (2): 94-98.doi: 1005-8885 (2007) 02-0094-05

Estimation of time-varying channels for pilot-assisted OFDM systems

唐甜;DENG Gang;JIANG Jun

Beijing University of Posts and Telecommunications

收稿日期:2006-11-30 修回日期:1900-01-01 出版日期:2007-06-30

Estimation of time-varying channels for pilot-assisted OFDM systems

TANG Tian;DENG Gang;JIANG Jun

Beijing University of Posts and Telecommunications

Received:2006-11-30 Revised:1900-01-01 Online:2007-06-30

摘要/Abstract

摘要：

Orthogonal frequency division multiplexing (OFDM) systems encounter performance degradations because of the time-varying (TV) channels common in wireless environments. The channel variations within one OFDM symbol introduce intercarrier interference. In this case, the frequency domain channel matrix is no longer diagonal, hence the corresponding channel estimation is challenging. In this article, two novel TV channel estimation approaches are proposed for the pilot-assisted OFDM systems, where the channel is approximated by the high-order linear model or the piece-wise linear model in time domain. The least square estimation is derived for the two kinds of channel approximations. The simulation is performed based on realistic TV channels with a fairly high Doppler spread. The results show the significant decreasing of the estimation mean square error using the proposed approaches.

关键词:

OFDM;pilot-assisted modulation;TV channels; channel estimation

Abstract:

Key words:

OFDM; pilot-assisted modulation; TV channels;channel estimation

中图分类号:

TN929.05

TANG Tian;DENG Gang;JIANG Jun. Estimation of time-varying channels for pilot-assisted OFDM systems[J]. Acta Metallurgica Sinica(English letters), 2007, 14(2): 94-98.

参考文献

1. Bingham J A C. Multicarrier modulation for data transmission: an idea whose time has come. IEEE Communications Magazine, 1990, 28(5): 5-14

2. Li Y, Cimini L J. Bounds on the interchannel interference of OFDM in time-varying impairments. IEEE Transactions on Communications, 2001, 49(3): 401-404

3. Jeon W, Chang K, Cho Y. An equalization technique for orthogonal frequency-division multiplexing systems in time-variant multipath channels. IEEE Transactions on Communications, 1999, 47(1): 27-32

4. Zhang Jian-hua, Zhang Ping. An analysis of interchannel interference of OFDM systems in time-varying channel. Journal of China Universities of Posts and Telecommunications, 2003, 10(4): 33-38

5. Ma X L, Giannakis G B, Ohno S. Optimal training for block transmissions over doubly selective wireless fading channels. IEEE Transactions on Signal Processing, 2003, 51(5): 1351-1366

6. Tang Z, Leus G, Cannizzaro R C, et al. Pilot-Assisted time-varying OFDM channel estimation. Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP’06): Vol 4, May 14-19, Toulouse, France. Piscataway, NJ, USA: IEEE, 2006: 133-136

7. Hu D, Lianghua H, Luxi Y. Estimation of rapidly time-varying channels for OFDM systems. Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP’06). May 14-19, Toulouse. 2006, 4: 357-360

8. Schniter P. Low-complexity equalization of OFDM in doubly selective channels. IEEE Transactions on Signal processing. 2004, 52(4): 1002-1011

9. Mostofi Y, Cox D C. ICI mitigation for pilot-aided OFDM mobile systems. IEEE Transactions on Wireless Communications. 2005, 4(2): 765-774

10. Kannu A P, Schniter P. MSE-optimal training for linear time-varying channels. Proceedings of the IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP’05): Vol 3, Mar 18-23, 2005, Philadelphisa, PA, USA. Piscataway, NJ, USA: IEEE, 2005: 789-792

11. Rugini L, Banelli P, Leus G. Simple equalization of time-varying channels for OFDM. IEEE Communications Letters, 2005, 9(7): 619-621

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Estimation of time-varying channels for pilot-assisted OFDM systems

Estimation of time-varying channels for pilot-assisted OFDM systems

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