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Channel Estimation Method for OFDM in Low SNR Based on Two-dimensional Spreading

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Abstract

In this paper, we present a channel estimation method based on two-dimensional signal spreading applicable to orthogonal frequency multiple access multicarrier systems. Our method exploits a spreading of a transmitted data signal as well as a pilot signal over the assigned frequency range and time period. As a spreading sequence we exploited orthogonal Walsh–Hadamard sequences. When compared with traditional pilot symbol based channel estimation, our method is beneficial in low signal to noise ratio (SNR). For a comparison of our method with state-of-the-art channel estimation method, we utilized an open source LTE downlink simulator developed at TU Vienna. This enables a reproducibility of our results. Considering the LTE system, our method outperforms the traditional approach in typical range of SNR from \(-\)5 to 10 dB. For a comparison of a throughput performance, a number of channel models has been employed.

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Acknowledgments

This work was supported by the Czech Science Foundation project No. 13-38735S Research into wireless channels for intra-vehicle communication and positioning, and was performed in laboratories supported by the SIX project, No. CZ.1.05/2.1.00/03.0072, the operational program Research and Development for Innovation. The cooperation in the COST IC1004 action was supported by the MEYS of the Czech Republic project no. LD12006 (CEEC). The authors would like to acknowledge the contribution of Christian Doppler Laboratory for Wireless Technologies for Sustainable Mobility.

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Authors and Affiliations

  1. Department of Radio Electronics, Brno University of Technology, Purkyňova 118, 612 00 , Brno, Czech Republic

    Jiri Blumenstein, Roman Maršálek, Zbynek Fedra, Aleš Prokeš & Christoph Mecklenbräuker

  2. Institute of Telecommunications, Vienna University of Technology, Gusshausstrasse 25/389, 1040 , Vienna, Austria

    Christoph Mecklenbräuker

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  1. Jiri Blumenstein
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  2. Roman Maršálek
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  3. Zbynek Fedra
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  4. Aleš Prokeš
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  5. Christoph Mecklenbräuker
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Correspondence to Jiri Blumenstein.

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Blumenstein, J., Maršálek, R., Fedra, Z. et al. Channel Estimation Method for OFDM in Low SNR Based on Two-dimensional Spreading. Wireless Pers Commun 78, 715–728 (2014). https://doi.org/10.1007/s11277-014-1779-y

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