TY - GEN
T1 - Superposition encoding and partial decoding is optimal for a class of Z-interference channels
AU - Liu, Nan
AU - Goldsmith, Andrea
PY - 2008
Y1 - 2008
N2 - We apply a technique introduced by Korner and Marton to the converse of a class of Z-interference channels. This class has the properties that, for the transmitter-receiver pair that suffers from interference, 1) the conditional output entropy is invariant with respect to the input and, 2) the maximum output entropy is achieved by a single input distribution irrespective of the interference distribution. We show that for this class of channels, superposition encoding and partial decoding is optimal. We thus provide a single-letter characterization for the capacity region, which was previously unknown.
AB - We apply a technique introduced by Korner and Marton to the converse of a class of Z-interference channels. This class has the properties that, for the transmitter-receiver pair that suffers from interference, 1) the conditional output entropy is invariant with respect to the input and, 2) the maximum output entropy is achieved by a single input distribution irrespective of the interference distribution. We show that for this class of channels, superposition encoding and partial decoding is optimal. We thus provide a single-letter characterization for the capacity region, which was previously unknown.
UR - https://www.scopus.com/pages/publications/52349086198
U2 - 10.1109/ISIT.2008.4595049
DO - 10.1109/ISIT.2008.4595049
M3 - Conference contribution
SN - 9781424422579
T3 - IEEE International Symposium on Information Theory - Proceedings
SP - 564
EP - 568
BT - Proceedings - 2008 IEEE International Symposium on Information Theory, ISIT 2008
T2 - 2008 IEEE International Symposium on Information Theory, ISIT 2008
Y2 - 6 July 2008 through 11 July 2008
ER -