Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/6365
Title: Capacity of All Nine Models of Channel Output Feedback for the Two-User Interference Channel
Authors: Sahai, Achaleshwar
Aggarwal, Vaneet
Yüksel, Melda
Sabharwal, Ashutosh
Keywords: [No Keywords]
Issue Date: 2013
Publisher: IEEE-Inst Electrical Electronics Engineers Inc
Abstract: In this paper, we study the impact of different channel output feedback architectures on the capacity of the two-user interference channel. For a two-user interference channel, a feedback link can exist between receivers and transmitters in nine canonical architectures (see Fig. 3), ranging from only one feedback link to four feedback links. We derive the exact capacity region for the symmetric deterministic interference channel and the constant-gap capacity region for the symmetric Gaussian interference channel for all of the nine architectures. We show that for a linear deterministic symmetric interference channel, in the weak interference regime, all models of feedback, except the one, which has only one of the receivers feeding back to its own transmitter, have the identical capacity region. When only one of the receivers feeds back to its own transmitter, the capacity region is a strict subset of the capacity region of the rest of the feedback models in the weak interference regime. However, the sum-capacity of all feedback models is identical in the weak interference regime. Moreover, in the strong interference regime, all models of feedback with at least one of the receivers feeding back to its own transmitter have the identical sum-capacity. For the Gaussian interference channel, the results of the linear deterministic model follow, where capacity is replaced with approximate capacity.
URI: https://doi.org/10.1109/TIT.2013.2278691
https://hdl.handle.net/20.500.11851/6365
ISSN: 0018-9448
1557-9654
Appears in Collections:Elektrik ve Elektronik Mühendisliği Bölümü / Department of Electrical & Electronics Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Show full item record

CORE Recommender

SCOPUSTM   
Citations

12
checked on Sep 23, 2022

WEB OF SCIENCETM
Citations

12
checked on Sep 24, 2022

Page view(s)

6
checked on Dec 26, 2022

Google ScholarTM

Check

Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.