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Please use this identifier to cite or link to this item: http://hdl.handle.net/10119/12951

Title: Outage based power allocation for a lossy-forwarding relaying system
Authors: Qian, Shen
Cheng, Meng
Matsumoto, Tad
Issue Date: 2015
Publisher: Institute of Electrical and Electronics Engineers (IEEE)
Magazine name: 2015 IEEE International Conference on Communication Workshop (ICCW)
Start page: 2139
End page: 2144
DOI: 10.1109/ICCW.2015.7247498
Abstract: In this paper, an optimal power allocation scheme for a simple lossy-forwarding relaying system is provided. Here, we extend our previous work of optimal power allocation of Slepian-Wolf relay system with constant source-relay error probability, to such that block Rayleigh fading is assumed for all transmission channel and lossy transmission is assumed in source-relay channel. Since data sequences transmitted from source and relay nodes are sent from one original source, they are correlated. At destination node, by exploiting the correlation knowledge between the two data sequences in joint decoding, the performance of the whole system can be significantly enhanced. This is because the network can be seen as a distributed Turbo code. A closed-form expression of the outage probability is derived at high signal-to-noisy ratios regime. It is shown that the outage curves calculated from the closed-form expression are sufficiently close to that obtained by the numerical calculation. Then, the optimum power allocation to the nodes for the system can be formulated as a convex optimization problem. Specifically, we minimize the outage probability while assuming the total transmit power is fixed, and also to minimize the total power under an given outage requirement. It is found that the system performance with the proposed optimum power allocation scheme outperform that with equal power allocation.
Rights: This is the author's version of the work. Copyright (C) 2015 IEEE. 2015 IEEE International Conference on Communication Workshop (ICCW), 2015, 2139-2144. 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.
URI: http://hdl.handle.net/10119/12951
Material Type: author
Appears in Collections:b11-1. 会議発表論文・発表資料 (Conference Papers)

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