On Gaussian Interference Channels with mixed interference
نویسندگان
چکیده
This work analyzes a particular achievable region for Gaussian interference channels (IFC) derived from the general Han-Kobayashi region. By reformulating the Han-Kobayashi achievable region as the sum of two sets, we characterize the maximum achievable sum-rate with Gaussian inputs and without timesharing in closed from for any Gaussian IFC. We then show that the computed sum-rate meets the upper bound by Kramer for any IFC with mixed interference, and not only for IFC with strong interference. We then show that for a certain subclass of IFCs with mixed interference, the capacity region contains a line segment of slope -1 of which we characterize the extreme points in term of the power allocation among private and common messages. Finally, for another subclass of IFCs with mixed interference, we show that the capacity region coincides with that of the corresponding Z-IFC, if Gaussian inputs are used.
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