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|Title:||Linear Transmission of Composite Gaussian Measurements over a Fading Channel under Delay Constraints|
|Keywords:||Science & Technology;Technology;Engineering, Electrical & Electronic;Telecommunications;Engineering;Linear transmission;delay constraint;composite of Gaussians;fading channel;water filling;wireless sensor networks;Networking & Telecommunications; Electrical And Electronic Engineering;1005 Communications Technologies;0805 Distributed Computing|
|Description:||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.|
|Type Of Material:||Other|
|Appears in Collections:||Faculty of Engineering|
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