Signal space alignment and degrees of freedom for the two-cluster multi-way relay channel

Ye Tian, Aylin Yener

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

    9 Scopus citations

    Abstract

    This paper investigates the degrees of freedom (DoF) of the multi-way relay channel. Specifically, the focus is on the case when there are two clusters and each cluster has two users that wish to exchange messages within the cluster with the help of the relay. It is assumed that the relay has N antennas and each of the users has M antennas. A DoF outerbound is derived and it is shown that for several scenarios of interests the DoF outerbound can be achieved. Specifically, when N ≤ M, a network coding based two-way relaying approach with time division multiplex access (TDMA) is sufficient to achieve the DoF outerbound. When M < N ≤ 4/3M, the signal space alignment with multiple access and broadcast transmission between the clusters can achieve the DoF outerbound. It is also show that when N ≥ 4M, the DoF outerbound can be achieved by just using multiple access and broadcast transmission between the users.

    Original languageEnglish (US)
    Title of host publication2012 1st IEEE International Conference on Communications in China, ICCC 2012
    Pages12-17
    Number of pages6
    DOIs
    StatePublished - Dec 28 2012
    Event2012 1st IEEE International Conference on Communications in China, ICCC 2012 - Beijing, China
    Duration: Aug 15 2012Aug 17 2012

    Publication series

    Name2012 1st IEEE International Conference on Communications in China, ICCC 2012

    Other

    Other2012 1st IEEE International Conference on Communications in China, ICCC 2012
    CountryChina
    CityBeijing
    Period8/15/128/17/12

    All Science Journal Classification (ASJC) codes

    • Computer Networks and Communications
    • Communication

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  • Cite this

    Tian, Y., & Yener, A. (2012). Signal space alignment and degrees of freedom for the two-cluster multi-way relay channel. In 2012 1st IEEE International Conference on Communications in China, ICCC 2012 (pp. 12-17). [6356855] (2012 1st IEEE International Conference on Communications in China, ICCC 2012). https://doi.org/10.1109/ICCChina.2012.6356855