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Conference Paper Upper Bounds on the Sum Capacity of the K-User Gaussian Interference Channel
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Authors
Junyoung Nam
Issue Date
2015-06
Citation
International Symposium on Information Theory (ISIT) 2015, pp.211-215
Language
English
Type
Conference Paper
DOI
https://dx.doi.org/10.1109/ISIT.2015.7282447
Abstract
The capacity region of the K-user Gaussian interference channel (GIC) is a long-standing open problem and even useful capacity outer bounds are little known in general. The significant progress on the degrees-of-freedom (DoF) capacity approximation for the K-user GIC has provided new insights into the problem of interest in the high signal-to-noise ratio (SNR) limit. However, such capacity approximation has been recently observed to reveal some limitations in predicting the capacity at realistic SNR. In this work, we derive new upper bounds on the capacity of the K-user GIC with complex channel gains to provide a more accurate and concrete perspective on capacity behaviors at finite SNR.
KSP Keywords
Complex channel, Degrees of freedom(DOF), Gaussian Interference Channel, High signal-to-noise ratio, Open Problem, Signal noise ratio(SNR), Sum Capacity, Upper bounds, capacity approximation, capacity region