Compressed Channel Sensing using Designated Null Subcarriers in Full Duplex Wireless OFDM Systems |
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Authors: | Jong-Ho Lee Yong-Hwa Kim |
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Affiliation: | 1. Department of Electronic Engineering, Gachon University, Seongnam, Gyeonggi, Korea 2. Department of Electronic Engineering, Myongji University, Yongin, Gyeonggi, Korea
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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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