On multiple access channels with asymmetric feedback

Vaneet Aggarwal; Ashutosh Sabharwal

doi:10.1109/ISIT.2008.4595016

On multiple access channels with asymmetric feedback

Vaneet Aggarwal, Ashutosh Sabharwal

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

1 Scopus citations

Abstract

In multiuser systems, the downlink capacity to different users is often different due to the near-far effect. We capture this asymmetry in the feedback link by introducing an asymmetric feedback model where different users get different amount of channel feedback from the base-station. Then, we derive the outage probability for the maximum-likelihood receiver, allowing us to study the impact of feedback asymmetry on multiuser performance. Interestingly, we discover that introducing systematic asymmetry in feedback can be beneficial in some cases, where only one user can adapt its power/rate to provide systemwide performance equivalent to that obtained by global feedback to all users.

Original language	English (US)
Title of host publication	Proceedings - 2008 IEEE International Symposium on Information Theory, ISIT 2008
Pages	399-403
Number of pages	5
DOIs	https://doi.org/10.1109/ISIT.2008.4595016
State	Published - 2008
Event	2008 IEEE International Symposium on Information Theory, ISIT 2008 - Toronto, ON, Canada Duration: Jul 6 2008 → Jul 11 2008

Publication series

Name	IEEE International Symposium on Information Theory - Proceedings
ISSN (Print)	2157-8101

Conference

Conference	2008 IEEE International Symposium on Information Theory, ISIT 2008
Country/Territory	Canada
City	Toronto, ON
Period	7/6/08 → 7/11/08

ASJC Scopus subject areas

Theoretical Computer Science
Information Systems
Modeling and Simulation
Applied Mathematics

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10.1109/ISIT.2008.4595016

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Aggarwal, V & Sabharwal, A 2008, On multiple access channels with asymmetric feedback. in Proceedings - 2008 IEEE International Symposium on Information Theory, ISIT 2008., 4595016, IEEE International Symposium on Information Theory - Proceedings, pp. 399-403, 2008 IEEE International Symposium on Information Theory, ISIT 2008, Toronto, ON, Canada, 7/6/08. https://doi.org/10.1109/ISIT.2008.4595016

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abstract = "In multiuser systems, the downlink capacity to different users is often different due to the near-far effect. We capture this asymmetry in the feedback link by introducing an asymmetric feedback model where different users get different amount of channel feedback from the base-station. Then, we derive the outage probability for the maximum-likelihood receiver, allowing us to study the impact of feedback asymmetry on multiuser performance. Interestingly, we discover that introducing systematic asymmetry in feedback can be beneficial in some cases, where only one user can adapt its power/rate to provide systemwide performance equivalent to that obtained by global feedback to all users.",

author = "Vaneet Aggarwal and Ashutosh Sabharwal",

year = "2008",

doi = "10.1109/ISIT.2008.4595016",

language = "English (US)",

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AB - In multiuser systems, the downlink capacity to different users is often different due to the near-far effect. We capture this asymmetry in the feedback link by introducing an asymmetric feedback model where different users get different amount of channel feedback from the base-station. Then, we derive the outage probability for the maximum-likelihood receiver, allowing us to study the impact of feedback asymmetry on multiuser performance. Interestingly, we discover that introducing systematic asymmetry in feedback can be beneficial in some cases, where only one user can adapt its power/rate to provide systemwide performance equivalent to that obtained by global feedback to all users.

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BT - Proceedings - 2008 IEEE International Symposium on Information Theory, ISIT 2008

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ER -

On multiple access channels with asymmetric feedback

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