Efficient algorithms for solution of interference cancellation and channel estimation for mobile OFDM system

Tong-liang Fan; Yu-cang Wen; Chaibou Kadri

doi:10.1117/12.2019764

19 March 2013 Efficient algorithms for solution of interference cancellation and channel estimation for mobile OFDM system

Tong-liang Fan, Yu-cang Wen, Chaibou Kadri

Author Affiliations +

Proceedings Volume 8762, PIAGENG 2013: Intelligent Information, Control, and Communication Technology for Agricultural Engineering; 876216 (2013) https://doi.org/10.1117/12.2019764
Event: Third International Conference on Photonics and Image in Agriculture Engineering (PIAGENG 2013), 2013, Sanya, China

Abstract

Orthogonal frequency-division multiplexing (OFDM) is robust against frequency selective fading because of the increase of the symbol duration. However, the time-varying nature of the channel causes inter-carrier interference (ICI) which destroys the orthogonal of sub-carriers and degrades the system performance severely. To alleviate the detrimental effect of ICI, there is a need for ICI mitigation within one OFDM symbol. We propose an iterative Inter-Carrier Interference (ICI) estimation and cancellation technique for OFDM systems based on regularized constrained total least squares. In the proposed scheme, ICI aren’t treated as additional additive white Gaussian noise (AWGN). The effect of Inter-Carrier Interference (ICI) and inter-symbol interference (ISI) on channel estimation is regarded as perturbation of channel. We propose a novel algorithm for channel estimation o based on regularized constrained total least squares. Computer simulations show that significant improvement can be obtained by the proposed scheme in fast fading channels.

Citation Download Citation

Tong-liang Fan, Yu-cang Wen, and Chaibou Kadri "Efficient algorithms for solution of interference cancellation and channel estimation for mobile OFDM system", Proc. SPIE 8762, PIAGENG 2013: Intelligent Information, Control, and Communication Technology for Agricultural Engineering, 876216 (19 March 2013); https://doi.org/10.1117/12.2019764

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