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 - http://www.scopus.com/inward/record.url?scp=52349086198&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=52349086198&partnerID=8YFLogxK

U2 - 10.1109/ISIT.2008.4595049

DO - 10.1109/ISIT.2008.4595049

M3 - Conference contribution

AN - SCOPUS:52349086198

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 -