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ISI Mitigating Precoder Design Method for MISO FMT Systems

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Abstract

This paper considers the inter-symbol interference mitigating precoder design problem for filtered multi-tone (FMT) systems. In FMT systems, due to the time-domain overlapped impulse response of a prototype filter, the desired channel and the temporal interference, referred to as inter-symbol interference (ISI), channel are linearly dependent, and it is inappropriate to adopt conventional MISO precoding schemes such as zero-forcing and matched-filtering methods. Instead, inspired by the approximate lower-bound equivalence of ISI (from temporally adjacent symbols to the desired symbol) and leakage interference (from the desired symbol to adjacent symbols), we propose a signal-to-leakage-interference-plus-noise ratio maximizing precoder design method to mitigate the ISI. From numerical simulations, it is demonstrated that the proposed precoder design method outperforms existing methods.

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Notes

  1. In general, for noncritical sampling, the upsampling factor K is larger than the number of subcarriers M [3].

  2. In general, the optimum power allocation to a multi-carrier transmission system is the water-pouring power allocation [13]. To focus on the precoder design, we assume that the maximum total transmit power \(P_T\) is sufficiently supplied.

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Authors and Affiliations

  1. Division of Electrical, Electronic and Control Engineering, Kongju National University, Cheonan-si, Seobuk-gu, Chungnam, South Korea

    Bangwon Seo

  2. Division of Navigation Science, Korea Maritime and Ocean University (KMOU), 727 Taejong-ro, Yeongdo-gu, Busan, 606-791, South Korea

    Joonwoo Shin

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  1. Bangwon Seo
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  2. Joonwoo Shin
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Correspondence to Joonwoo Shin.

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Seo, B., Shin, J. ISI Mitigating Precoder Design Method for MISO FMT Systems. Wireless Pers Commun 111, 2155–2166 (2020). https://doi.org/10.1007/s11277-019-06977-9

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  • DOI: https://doi.org/10.1007/s11277-019-06977-9

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