Resource allocation in multiple-relay systems exploiting opportunistic energy harvesting
Resource allocation in multiple-relay systems exploiting opportunistic energy harvesting
复制标题
利用机会能量收集的多中继系统中的资源分配
DOI:
10.1007/s11432-017-9137-5
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发表时间:
2017-09
期刊:
影响因子:
--
通讯作者:
Yechao Bai
中科院分区:
文献类型:
--
作者:
Zeyu Chen;Lan Tang;Xinggan Zhang;Yechao Bai
Dear editor, Energy harvesting technique, as an important solution for green communication, has attracted significant concerns from industry and academia. In wireless relay systems, if relays (or destination) are (is) charged by wireless energy, new relaying policies need be developed to satisfy the requirements of information rate and energy transfer efficiency. Refs.[1, 2] investigated how to achieve various tradeoffs by optimizing the transmission schemes for simultaneous wireless information and power transfer in relay systems. Refs.[3, 4] concentrated on the performance analysis of relay systems, in which relays harvested energy and forwarded information signals with time switching (TS) or power switching (PS) relaying protocol.In this article, we study relay networks with one source-destination pair and multiple wireless powered relays in fading channels. All relays replenish energy via opportunistic energy harvesting. Since both the harvested energy and consumed energy of relays depend on time-varying channel state information (CSI), we aim at determining the optimal cooperative transmission and power control scheme to maximize the average throughput of such a system by taking full advantage of fading channels. By assuming the relays always have enough data and energy in storage, the problem is formulated as a convex problem and an upper bound on average throughput is obtained by
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