TY - GEN
T1 - Relaying simultaneous multicasts via structured codes
AU - Gunduz, D.
AU - Simeone, O.
AU - Goldsmith, A.
AU - Poor, H. V.
AU - Shamai, S.
PY - 2009
Y1 - 2009
N2 - 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.
AB - 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.
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U2 - 10.1109/ISIT.2009.5205938
DO - 10.1109/ISIT.2009.5205938
M3 - Conference contribution
AN - SCOPUS:70449513756
SN - 9781424443130
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 2321
EP - 2325
BT - 2009 IEEE International Symposium on Information Theory, ISIT 2009
T2 - 2009 IEEE International Symposium on Information Theory, ISIT 2009
Y2 - 28 June 2009 through 3 July 2009
ER -