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

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ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Chida, Y., Inamori, M., & Sanada, Y. (2013). Non-orthogonal access scheme based on interference cancelation and log-likelihood weighting with LDPC code. In 2013 IEEE 24th Annual International Symposium on Personal, Indoor, and Mobile Radio Communications, PIMRC 2013 (pp. 1332-1336). [6666346] (IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC). https://doi.org/10.1109/PIMRC.2013.6666346