When Does Channel-Output Feedback Enlarge the Capacity Region of the Interference Channel?

Victor Quintero 1 Samir M. Perlaza 1 Iñaki Esnaola 2 Jean-Marie Gorce 1
1 SOCRATE - Software and Cognitive radio for telecommunications
Inria Grenoble - Rhône-Alpes, CITI - CITI Centre of Innovation in Telecommunications and Integration of services
Abstract : In this research report, the benefits of channel-output feedback in the Gaussian interference channel (G-IC) are studied under the effect of additive Gaussian noise. Using a linear deterministic (LD) model, the signal to noise ratios (SNRs) in the feedback links beyond which feedback plays a significant role in terms of increasing the individual rates or the sum-rate are approximated. The relevance of this work lies on the fact that it identifies the feedback SNRs for which in any G-IC one of the following statements is true: (a) Feedback does not enlarge the capacity region; (b) Feedback enlarges the capacity region and the sum-rate is higher than the largest sum-rate without feedback; and (c) Feedback enlarges the capacity region but no significant improvement is observed in the sum-rate.
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Submitted on : Friday, June 23, 2017 - 10:32:10 AM
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  • HAL Id : hal-01281717, version 6


Victor Quintero, Samir M. Perlaza, Iñaki Esnaola, Jean-Marie Gorce. When Does Channel-Output Feedback Enlarge the Capacity Region of the Interference Channel?. [Research Report] RR-8862, INRIA Grenoble - Rhône-Alpes. 2016, pp.34. ⟨hal-01281717v6⟩



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