How large portion of K/2 DoF can we achieve at finite SNR in the Gaussian interference channel?

The K/2 degrees of freedom (DoF) of the K-user Gaussian interference channel (GIC) are well known to be achievable for almost all constant real channel coefficients. In this paper, we investigate the sum-rate behavior of the K-user GIC at finite SNR. To this end, we derive closed-form upper bounds o...

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Bibliographic Details
Main Authors: Nam, Junyoung, Ko, Young-Jo
Format: Conference Proceeding
Language:English
Subjects:
Additive noise
capacity bounds
Channels
Conferences
Constants
degrees of freedom
Exact solutions
Gaussian
Gaussian interference channel
Interference
Interference channels
Mathematical analysis
Noise measurement
Random sequences
Signal to noise ratio
Symmetry
Upper bound
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Summary:The K/2 degrees of freedom (DoF) of the K-user Gaussian interference channel (GIC) are well known to be achievable for almost all constant real channel coefficients. In this paper, we investigate the sum-rate behavior of the K-user GIC at finite SNR. To this end, we derive closed-form upper bounds on the sum capacity for the symmetric real and semi-symmetric complex cases. We further show how large portion of K/2 DoF is achievable at realistic SNR.
ISSN:2576-2303
1058-6393
DOI:10.1109/ACSSC.2015.7421352