Degrees of freedom optimal transmission for the two-cluster MIMO multi-way relay channel

Ye Tian, Aylin Yener

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

    3 Scopus citations

    Abstract

    This paper investigates the degrees of freedom (DoF) of the two-cluster multi-way relay channel. Two cases are investigated: the case when there are 2 users in each cluster with arbitrary number of antennas and the case when there are 3 users in each cluster in the symmetric setting, i.e., all the users have the same number of antennas. For the 2-user case, a DoF upper bound is derived based on cut set bound by allowing user cooperation between clusters. Conditions when the DoF upper bound can be achieved using signal space alignment are established based on the relative number of antennas between the users and the relay. For the 3-user case, a new DoF upper bound is derived using genie-aided approach and channel enhancement. The DoF upper bound can be achieved using signal space alignment for several scenarios of interests. The results point out the insight that increasing the number of users in each cluster cannot provide a further DoF gain compared to the 2-user case, when the relay has limited number of antennas.

    Original languageEnglish (US)
    Title of host publication2013 IEEE International Conference on Communications, ICC 2013
    PublisherInstitute of Electrical and Electronics Engineers Inc.
    Pages3344-3348
    Number of pages5
    ISBN (Print)9781467331227
    DOIs
    StatePublished - Jan 1 2013
    Event2013 IEEE International Conference on Communications, ICC 2013 - Budapest, Hungary
    Duration: Jun 9 2013Jun 13 2013

    Publication series

    NameIEEE International Conference on Communications
    ISSN (Print)1550-3607

    Other

    Other2013 IEEE International Conference on Communications, ICC 2013
    Country/TerritoryHungary
    CityBudapest
    Period6/9/136/13/13

    All Science Journal Classification (ASJC) codes

    • Computer Networks and Communications
    • Electrical and Electronic Engineering

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