An Adaptive Channel Estimation Based on Polynomial Fitting for LTE Uplink in High Doppler Spread Scenario

Abstract:

Channel estimation plays a crucial role in improving the overall system performance in long term evolution (LTE) systems. However, it is demonstrated that conventional channel estimation algorithms have poor performance in the presence of a large Doppler frequency shift. To mitigate the adverse effect of Doppler frequency shift on transmission signals, an adaptive anti-Doppler shift method based on polynomial fitting for LTE uplink is proposed in this paper. Furthermore, an adaptive strategy is exploited to improve estimation accuracy and reduce estimation mean square error (MSE), achieving better system performance. Simulations results validate the effectiveness of anti-Doppler algorithm.

• Periodical: Advanced Materials Research (Volumes 756-759)
• Pages: 3522-3526
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.756-759.3522
• Online since: September 2013
• Authors: Bei Jia Liu, Xiao Wang, Xue Zhi Tan, Yang Yu
• Keywords: Channel Estimation, LS, LTE Uplink, Polynomial Fitting

References

[1] H.G. Myung, J. Lim and D.J. Goodman, Single Carrier FDMA for Uplink Wireless Transmission[J], IEEE Vehicular Technology Magazine, vol. 1, no. 3, pp.30-38, (2006).

DOI: 10.1109/mvt.2006.307304

[2] S. Coleri, M. Ergen, and A. Puri, Channel estimation techniques based on pilot arrangement in OFDM systems, IEEE Trans. Broadcasting, vol. 48, no. 3, pp.223-229, Sep. (2002).

DOI: 10.1109/tbc.2002.804034

[3] K. Han, S. Lee, J. Lim, and K. Sung, Channel estimation for OFDM with fast fading channels by modified Kalman filter, Consumer Electronics, IEEE Transactions on, vol. 50, no. 2, pp.443-449, (2004).

DOI: 10.1109/tce.2004.1309406

[4] R. Negi and J. Cioffi, Pilot tone selection for channel estimation in a mobile OFDM system [J], IEEE Transactions on Consumer Electronics, vol. 44, no. 3, pp.1122-1128, (1998).

DOI: 10.1109/30.713244

[5] H. Hijazi and L. Ros, Polynomial Estimation of Time-Varing Multipath Gains With Intercarrier Mitigation in OFDM, IEEE Transactions on Communications, vol. 58, pp.140-151, (2009).

DOI: 10.1109/tvt.2008.923653

[6] Q. Guo, M. Wu, and X. Hao, A Novel Iterative Algorithm for Time-varing Channel Estimation in OFDM systems, International Journal of Digital Content Technology and its Applications , vol. 5, pp.20-27, (2011).

DOI: 10.4156/jdcta.vol5.issue12.3

[7] B. Karakaya, H. Arslan, and H.A. Cirpan, Channel estimation for LTE uplink in high Doppler spread[C], in IEEE Wireless Communications & Networking Conference, vol. 1-7, pp.1126-1130, (2008).

DOI: 10.1109/wcnc.2008.203