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K-User Fading Interference Channels: The Ergodic Very Strong Case (0910.4874v1)
Published 26 Oct 2009 in cs.IT and math.IT
Abstract: Sufficient conditions required to achieve the interference-free capacity region of ergodic fading K-user interference channels (IFCs) are obtained. In particular, this capacity region is shown to be achieved when every receiver decodes all K transmitted messages such that the channel statistics and the waterfilling power policies for all K (interference-free) links satisfy a set of K(K-1) ergodic very strong conditions. The result is also of independent interest in combinatorics.