On the energy-distortion tradeoff of Gaussian broadcast channels with feedback
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Published version
Author(s)
Murin, Y
Kaspi, Y
Dabora, R
Gunduz, D
Type
Journal Article
Abstract
This work studies the relationship between the energy allocated for transmitting a pair of correlated Gaussian sources over a two-user Gaussian broadcast channel with noiseless channel output feedback (GBCF) and the resulting distortion at the receivers. Our goal is to characterize the minimum transmission energy required for broadcasting a pair of source samples, such that each source can be reconstructed at its respective receiver to within a target distortion, when the source-channel bandwidth ratio is not restricted. This minimum transmission energy is defined as the energy-distortion tradeoff (EDT). We derive a lower bound and three upper bounds on the optimal EDT. For the upper bounds, we analyze the EDT of three transmission schemes: two schemes are based on separate source-channel coding and apply encoding over multiple samples of source pairs, and the third scheme is a joint source-channel coding scheme that applies uncoded linear transmission on a single source-sample pair and is obtained by extending the Ozarow–Leung (OL) scheme. Numerical simulations show that the EDT of the OL-based scheme is close to that of the better of the two separation-based schemes, which makes the OL scheme attractive for energy-efficient, low-latency and low-complexity source transmission over GBCFs.
Date Issued
2017-05-24
Date Acceptance
2017-05-19
Citation
Entropy, 2017, 19 (6)
ISSN
1099-4300
Publisher
MDPI
Journal / Book Title
Entropy
Volume
19
Issue
6
Copyright Statement
© 2017 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access
article distributed under the terms and conditions of the Creative Commons Attribution
(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
article distributed under the terms and conditions of the Creative Commons Attribution
(CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Sponsor
Commission of the European Communities
Grant Number
677854
Subjects
Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
Gaussian broadcast channel with feedback
correlated sources
joint source-channel coding
energy efficiency
energy-distortion tradeoff
CORRELATED SOURCES
SENSOR NETWORKS
MINIMUM ENERGY
SCHEMES
MAC
EFFICIENCY
CAPACITY
REGION
Fluids & Plasmas
01 Mathematical Sciences
02 Physical Sciences
Publication Status
Published
Article Number
243