Non-orthogonal access scheme based on interference cancelation and log-likelihood weighting with LDPC code

Yuji Chida, Mamiko Inamori, Yukitoshi Sanada

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Non-orthogonal access improves the spectral efficiency through sharing the same frequency resource with multiple wireless terminals. In the previous researches, it has been shown that a log likelihood ratio (LLR) calculated from a signal on the sharing spectrum should be masked to zero if a power of an interference signal is stronger than that of a desired signal. This implies that the spectrum is not shared by the terminal receiving the weaker signal. In this paper, a spectrum sharing scheme on the basis of interference cancelation and LLR weighting to reduce the effect of interference in low density parity check (LDPC) decoding is proposed. Numerical results obtained thorough computer simulation show that the proposed scheme improves the performance by 2dB at the BER of 10-2 as compared to that of the system without weighting and overlapping to the parity bits is less sensitive to the BER performance relative to the case for overlapping to the systematic bits.

    Original languageEnglish
    Title of host publication2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
    Pages1332-1336
    Number of pages5
    DOIs
    Publication statusPublished - 2013 Dec 1
    Event2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013 - London, United Kingdom
    Duration: 2013 Sep 82013 Sep 11

    Publication series

    NameIEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

    Other

    Other2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013
    CountryUnited Kingdom
    CityLondon
    Period13/9/813/9/11

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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