Optimal selective feedback policies for opportunistic beamforming under peak feedback constraints

Tharaka Samarasinghe, Hazer Inaltekin, Jamie S. Evans

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

1 Citation (Scopus)

Abstract

Opportunistic beamforming (OBF) is a well-known communication technique that utilizes partial channel state information (CSI) to obtain multiuser diversity gains in the downlink. We focus on the structure of the optimal homogenous threshold feedback policy that maximizes the ergodic downlink sum-rate for OBF under a peak feedback load constraint, which we model by using a multi-packet reception model for the uplink. We solve the resulting quasi-convex optimization problem by obtaining a formula for the sum-rate maximizing feedback probability. While providing insights on the implications of our results in practical systems, we also illustrate the tradeoff between feedback and rate by obtaining the Pareto optimal boundary between feasible and infeasible feedback-rate pairs.

Original languageEnglish
Title of host publication2012 IEEE International Symposium on Information Theory proceedings
Place of PublicationPiscataway, NJ
PublisherInstitute of Electrical and Electronics Engineers (IEEE)
Pages2919-2923
Number of pages5
ISBN (Electronic)9781467325790, 9781467325783
ISBN (Print)9781467325806
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event2012 IEEE International Symposium on Information Theory, ISIT 2012 - Cambridge, MA, United States
Duration: 1 Jul 20126 Jul 2012

Publication series

Name
ISSN (Print)2157-8095
ISSN (Electronic)2157-8095

Other

Other2012 IEEE International Symposium on Information Theory, ISIT 2012
CountryUnited States
CityCambridge, MA
Period1/07/126/07/12

Fingerprint Dive into the research topics of 'Optimal selective feedback policies for opportunistic beamforming under peak feedback constraints'. Together they form a unique fingerprint.

Cite this