TY - GEN
T1 - Ergodic two-user interference channels
T2 - 46th Annual Allerton Conference on Communication, Control, and Computing
AU - Sankar, Lalitha
AU - Shang, Xiaohu
AU - Erkip, Elza
AU - Poor, H. Vincent
PY - 2008
Y1 - 2008
N2 - The optimality of separable encoding and decoding over parallel channels (fading states) for ergodic fading two-user interference channels (IFCs) is studied using a one-sided IFC as a model. For an ergodic fading one-sided IFC with non-fading direct links and a fading cross-channel link, it is shown that separability can be strictly suboptimal except for the cases where all the parallel channels are of the same type, i.e., all of them are either strong but not very strong or very strong channels. A recent result on the sum-capacities of classes of ergodic strong and very strong IFCs is used to show that encoding and decoding jointly over all parallel channels is optimal when either the strong or very strong interference conditions hold on average over all channels.
AB - The optimality of separable encoding and decoding over parallel channels (fading states) for ergodic fading two-user interference channels (IFCs) is studied using a one-sided IFC as a model. For an ergodic fading one-sided IFC with non-fading direct links and a fading cross-channel link, it is shown that separability can be strictly suboptimal except for the cases where all the parallel channels are of the same type, i.e., all of them are either strong but not very strong or very strong channels. A recent result on the sum-capacities of classes of ergodic strong and very strong IFCs is used to show that encoding and decoding jointly over all parallel channels is optimal when either the strong or very strong interference conditions hold on average over all channels.
UR - http://www.scopus.com/inward/record.url?scp=64549087594&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=64549087594&partnerID=8YFLogxK
U2 - 10.1109/ALLERTON.2008.4797629
DO - 10.1109/ALLERTON.2008.4797629
M3 - Conference contribution
AN - SCOPUS:64549087594
SN - 9781424429264
T3 - 46th Annual Allerton Conference on Communication, Control, and Computing
SP - 723
EP - 729
BT - 46th Annual Allerton Conference on Communication, Control, and Computing
Y2 - 24 September 2008 through 26 September 2008
ER -