LDPC coded soft forwarding with network coding for the two-way relay channel

Dushantha N.K. Jayakody, Jun Li, Mark F. Flanagan

    Результат исследований: Материалы для книги/типы отчетовМатериалы для конференции

    5 Цитирования (Scopus)

    Аннотация

    This paper investigates a low-density parity-check (LDPC) coded soft-decode-and-forward (SDF) relaying protocol for a two way relay channel (TWRC). In this SDF protocol, the relay evaluates the reliabilities, expressed as log-likelihood ratios (LLRs), of the received signals from the two sources. The relay then forwards a network-coded combination of the parity symbols of both sources, but in the 'soft' domain to avoid error propagation from the relay. We introduce a model for the effective noise experienced by the soft network coded symbols, constituting the new parameters of soft scalar and soft error; this model is then used to compute the log-likelihood ratios (LLRs) at the destination. To facilitate this latter computation, we have derived an analytical expression for soft error variance, as well as a simplified expression based on a common assumption on the statistical behavior of the LLRs. This enables low-complexity computation and tracking of the soft error variance on-the-fly. The proposed system outperforms standard competing schemes reported in the literature in terms of error rate performance over Rayleigh fading links.

    Язык оригиналаАнглийский
    Название основной публикации2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, PIMRC 2014
    ИздательInstitute of Electrical and Electronics Engineers Inc.
    Страницы253-257
    Число страниц5
    Том2014-June
    ISBN (электронное издание)9781479949120
    DOI
    СостояниеОпубликовано - 25 июн 2014
    Событие2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014 - Washington, Соединенные Штаты Америки
    Продолжительность: 2 сен 20145 сен 2014

    Конференция

    Конференция2014 25th IEEE Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, IEEE PIMRC 2014
    СтранаСоединенные Штаты Америки
    ГородWashington
    Период2.9.145.9.14

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

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  • Цитировать

    Jayakody, D. N. K., Li, J., & Flanagan, M. F. (2014). LDPC coded soft forwarding with network coding for the two-way relay channel. В 2014 IEEE 25th Annual International Symposium on Personal, Indoor, and Mobile Radio Communication, PIMRC 2014 (Том 2014-June, стр. 253-257). [7136170] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/PIMRC.2014.7136170