Relaying simultaneous multicasts via structured codes

Document Type

Conference Proceeding

Publication Date

11-19-2009

Abstract

Simultaneous multicasting of messages with the help of a relay is studied. A two-source two-destination network is considered, in which each destination can receive directly only the signal from one of the sources, so that the reception of the message from the other source (and multicasting) is enabled by the presence of the relay. An outer bound is derived which is shown to be achievable in the case of finite-field moduloadditive channels by using linear codes, highlighting the benefits of structured codes in exploiting the underlying physical-layer structure of the network. Results are extended to the Gaussian channel model as well, providing achievable rate regions based on nested lattice codes. It is shown that for a wide range of power constraints, the performance with lattice codes approaches the upper bound and surpasses the rates achieved by the standard random coding schemes. © 2009 IEEE.

Identifier

70449513756 (Scopus)

ISBN

[9781424443130]

Publication Title

IEEE International Symposium on Information Theory Proceedings

External Full Text Location

https://doi.org/10.1109/ISIT.2009.5205938

ISSN

21578102

First Page

2321

Last Page

2325

This document is currently not available here.

Share

COinS