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Transmission Efficient Channel Estimation for OFDM System Under Multi-path Fast Fading Channel


This paper considers the channel estimation method in the case of a high mobility communication in orthogonal frequency-division multiplexing (OFDM) systems. In this paper, several successive OFDM symbols experienced channel are treated as a window. The polynomial approximation of the channel parameters in the time domain is considered. We show that the low order polynomials are good enough to model the channel within a window. Hence the interpolation performing over a whole window profits pilot reduction. Moreover, the method has an advantage of computational complexity because of the low order polynomial approximation and without the requirement of inter-carrier interference mitigation. The method is derived with the least-square approach for polynomial interpolation of arbitrary order. Simulation results show that the proposed method is robust to high Doppler frequency and enhancing the transmission efficiency.

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This work was partially supported by the Ministry of Science and Technology of the Taiwan, ROC (Grant No. NSC 103-2218-E-539 -001).

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Correspondence to Yih-Haw Jan.

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Jan, YH. Transmission Efficient Channel Estimation for OFDM System Under Multi-path Fast Fading Channel. Wireless Pers Commun 84, 1561–1575 (2015).

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  • Channel estimation
  • OFDM
  • Fast time-varying channel
  • Transmission efficiency
  • Low computational complexity