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On the Capacity of Symmetric M-User Gaussian Interference Channels with Feedback
Approximate Capacity Region of the Two-User Gaussian Interference Channel with Noisy Channel-Output Feedback
In this paper, the capacity region of the linear deterministic
interference channel with noisy channel-output feedback
(LD-IC-NF) is fully characterized. The proof of achievability is
based on random coding arguments and rate splitting; blockMarkov
superposition coding; and backward decoding. The
proof of converse reuses some of the existing outer bounds and
includes new ones obtained using genie-aided models. Following
the insight gained from the analysis of the LD-IC-NF, an achievability
region and a converse region for the two-user Gaussian
interference channel with noisy channel-output feedback (GIC-NF)
are presented. Finally, the achievability region and the
converse region are proven to approximate the capacity region
of the G-IC-NF to within 4.4 bits