Feasibility conditions of signal space alignment for network coding on K-user MIMO Y channels

Kwangwon Lee, Namyoon Lee, Inkyu Lee

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

20 Citations (Scopus)

Abstract

In this paper, we consider K-user MIMO Y channels where K users simultaneously exchange messages with each other via an intermediate relay. Degrees of freedom (DOF) of this channel are not known in general. The investigation of the feasibility conditions of signal space alignment for network coding is an initial step for addressing this open problem. We verify that when user i has Mi antennas (i=1, ..., K) and a relay has N antennas, the DOF of K(K-1) is achieved if Mi ≥ K-1, N ≥ K(K-1)/2 and N < min {Mi+Mj|∀ i ≠ j}. It is accomplished by adopting the signal space alignment for network coding during both multiple access channel and broadcasting channel phase. The achievability is shown by an amplify-and-forward (AF) relaying strategy combined with the signal space alignment for the network coding scheme, which provides a lower bound of the capacity.

Original languageEnglish
Title of host publication2011 IEEE International Conference on Communications, ICC 2011
DOIs
Publication statusPublished - 2011
Event2011 IEEE International Conference on Communications, ICC 2011 - Kyoto, Japan
Duration: 2011 Jun 52011 Jun 9

Publication series

NameIEEE International Conference on Communications
ISSN (Print)0536-1486

Other

Other2011 IEEE International Conference on Communications, ICC 2011
CountryJapan
CityKyoto
Period11/6/511/6/9

ASJC Scopus subject areas

  • Computer Networks and Communications
  • Electrical and Electronic Engineering

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  • Cite this

    Lee, K., Lee, N., & Lee, I. (2011). Feasibility conditions of signal space alignment for network coding on K-user MIMO Y channels. In 2011 IEEE International Conference on Communications, ICC 2011 [5963120] (IEEE International Conference on Communications). https://doi.org/10.1109/icc.2011.5963120