Linear Transmission of Composite Gaussian Measurements over a Fading Channel under Delay Constraints

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Title: Linear Transmission of Composite Gaussian Measurements over a Fading Channel under Delay Constraints
Authors: Tan, O
Gunduz, D
Gomez-Vilardebo, J
Item Type: Journal Article
Abstract: Delay constrained linear transmission (LT) strategies are considered for the transmission of composite Gaussian measurements over an additive white Gaussian noise fading channel under an average power constraint. If the channel state information (CSI) is known by both the encoder and decoder, the optimal LT scheme in terms of the average mean-square error distortion is characterized under a strict delay constraint, and a graphical interpretation of the optimal power allocation strategy is presented. Then, for general delay constraints, two LT strategies are proposed based on the solution to a particular multiple measurements-parallel channels scenario. It is shown that the distortion decreases as the delay constraint is relaxed, and when the delay constraint is completely removed, both strategies achieve the optimal performance under certain matching conditions. If the CSI is known only by the decoder, the optimal LT strategy is derived under a strict delay constraint. The extension to general delay constraints is elusive. As a first step towards understanding the structure of the optimal scheme in this case, it is shown that for the multiple measurementsparallel channels scenario, any LT scheme that uses only a oneto-one linear mapping between measurements and channels is suboptimal in general.
Issue Date: 9-Jun-2016
Date of Acceptance: 23-Feb-2016
ISSN: 1536-1276
Publisher: IEEE
Start Page: 4335
End Page: 4347
Journal / Book Title: IEEE Transactions on Wireless Communications
Volume: 15
Issue: 6
Copyright Statement: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
Keywords: Science & Technology
Engineering, Electrical & Electronic
Linear transmission
delay constraint
composite of Gaussians
fading channel
water filling
wireless sensor networks
Networking & Telecommunications
0906 Electrical And Electronic Engineering
1005 Communications Technologies
0805 Distributed Computing
Publication Status: Published
Appears in Collections:Faculty of Engineering
Electrical and Electronic Engineering

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