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A Channel Estimation Method for OFDM Based Wireless Communication System in High Speed Environment

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Abstract

This paper investigates the channel estimation in an Orthogonal Frequency Division Multiplexing system under a fast-varying channel, by exploiting a frequency shifted complex exponential basis expansion models (CE-BEM). The conventional CE-BEM model suffers from power leakage and consequential modelling error floor, especially at the channel boundaries. The proposed BEM model reduces the leakage power efficiently by exploiting a fractional frequency on the coefficients of CE-BEM matrix. Numerical results show that the performance of the proposed channel modeling and coefficients estimation method are robust against various normalized Doppler frequency. The modeling error at the channel boundaries can be reduced substantially.

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Acknowledgments

This work was supported in part by the National Natural Science Foundation of China under Grant 61222105, the National Key Technology R&D Program of China 2014ZX03001011-002, the Project of State Key Lab under Grant RCS2014ZT11, the Key Project of Chinese Ministry of Education under Grant 313006 and the NSFC under Grant U1334202.

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Authors and Affiliations

  1. School of Electronic Information Engineering, Beijing Jiaotong University, Beijing, 100044, China

    Ruiqi Zhang

  2. State Key Lab of Rail Traffic Control and Safety, Beijing Jiaotong University, Beijing, 100044, China

    Bo Ai

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  1. Ruiqi Zhang
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  2. Bo Ai
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Correspondence to Ruiqi Zhang.

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Zhang, R., Ai, B. A Channel Estimation Method for OFDM Based Wireless Communication System in High Speed Environment. Wireless Pers Commun 94, 909–926 (2017). https://doi.org/10.1007/s11277-016-3657-2

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