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Compressed Channel Sensing using Designated Null Subcarriers in Full Duplex Wireless OFDM Systems

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Abstract

In this paper, we examine the digital cancellation of self-interference in full duplex wireless orthogonal frequency division multiplexing systems. Since digital cancellation highly depends on the accurate estimation of self-interference channels, which tends to be sparse, we propose a compressed sensing based channel estimator that uses designated null subcarriers. Our numerical results show that, by providing more accurate estimates of self-interference channels, the proposed scheme outperforms the conventional least square methods in terms of the self-interference suppression.

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Acknowledgments

This research was supported in part by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (NRF-2013R1A1A1A05004401) and in part by the Institute for Information & Communications Technology Promotion (IITP) funded by the Ministry of Science, ICT, and Future Planning (#2014-044-015).

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Authors and Affiliations

  1. Department of Electronic Engineering, Gachon University, Seongnam, Gyeonggi, Korea

    Jong-Ho Lee

  2. Department of Electronic Engineering, Myongji University, Yongin, Gyeonggi, Korea

    Yong-Hwa Kim

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  1. Jong-Ho Lee
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  2. Yong-Hwa Kim
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Correspondence to Yong-Hwa Kim.

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Lee, JH., Kim, YH. Compressed Channel Sensing using Designated Null Subcarriers in Full Duplex Wireless OFDM Systems. Wireless Pers Commun 79, 1635–1645 (2014). https://doi.org/10.1007/s11277-014-1949-y

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