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Journal Articles IEEE Transactions on Communications Year : 2017

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

Abstract

In this paper, 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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Dates and versions

hal-01432525 , version 1 (11-01-2017)
hal-01432525 , version 2 (23-06-2017)
hal-01432525 , version 3 (14-09-2017)

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Cite

Victor Quintero, Samir Perlaza, Iñaki Iñaki Esnaola, Jean-Marie Gorce. When Does Output Feedback Enlarge the Capacity of the Interference Channel?. IEEE Transactions on Communications, 2017, 66 (2), pp.615-628. ⟨10.1109/TCOMM.2017.2753252⟩. ⟨hal-01432525v3⟩
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