Throughput Maximization in Multicarrier Wireless Powered Relaying Networks
Throughput Maximization in Multicarrier Wireless Powered Relaying Networks
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DOI：
10.1109/lwc.2015.2424237
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发表时间：
2015-04
影响因子：
6.3
通讯作者：
P. Diamantoulakis;Georgia D. Ntouni;Koralia N. Pappi;G. Karagiannidis;B. Sharif
中科院分区：
文献类型：
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作者：
P. Diamantoulakis;Georgia D. Ntouni;Koralia N. Pappi;G. Karagiannidis;B. Sharif
研究了具有无线供电中继的多载波两跳链路中的动态功率分配和功率分裂问题。我们首先制定了相应的优化问题，它包括联合优化-在可实现的速率方面-的，1）多个信道之间的动态功率分配，2）在中继的信息处理和能量收集之间的功率分配比的选择，当放大和转发应用。这是一个非凸优化问题，它被映射到一个凸的，并使用一维搜索和对偶分解的最优解，同时也提出了一个次优有效的迭代方法。仿真结果表明，吞吐量显着增加，当比较所提出的方法与两种替代的功率分配方案，而他们验证了快速收敛的迭代解决方案的有效性。
Dynamic power allocation and power splitting, in a multicarrier two-hop link with a wireless powered relay, is investigated. We first formulate the corresponding optimization problem, which consists of the joint optimization -in terms of achievable rate- of, 1) the dynamic power allocation among multiple channels and, 2) the selection of the power splitting ratio between information processing and energy harvesting at the relay, when amplify-and-forward is applied. This is a non-convex optimization problem, which is mapped to a convex one and optimally solved using one-dimensional search and dual decomposition, while a suboptimal efficient iterative method is also proposed. Simulations reveal a significant increase in the throughput, when comparing the proposed approach with two alternative power allocation schemes, while they verify the effectiveness of the fast-converging iterative solution.