European Transactions on Telecommunications · 2008 · 259 citations · 12 references
EngineeringElectrical EngineeringDigital CommunicationInformation TheoryWireless CommunicationsChannel CapacityChannel CodingWireless Channel ModelingChannel Capacity ApproximationsDeterministic Channel ModelingGaussian Channel CapacityGaussian ChannelsInformation-theoretic CapacityInterference ChannelInterference Channel Capacity
The paper investigates the two‑user Gaussian interference channel using a natural deterministic channel model. The authors show that the deterministic model approximates the Gaussian channel within a constant gap, reducing the capacity problem to the simpler deterministic case and offering an alternative derivation of the constant‑gap capacity characterization. © 2008 John Wiley & Sons, Ltd.
Abstract This paper explores the two‐user Gaussian interference channel through the lens of a natural deterministic channel model. The main result is that the deterministic channel uniformly approximates the Gaussian channel, the capacity regions differing by a universal constant. The problem of finding the capacity of the Gaussian channel to within a constant error is therefore reduced to that of finding the capacity of the far simpler deterministic channel. Thus, the paper provides an alternative derivation of the recent constant gap capacity characterisation of Etkin, Tse and Wang. Additionally, the deterministic model gives significant insight towards the Gaussian channel. Copyright © 2008 John Wiley & Sons, Ltd.
12