Power Allocation Strategies in Energy Harvesting Wireless Cooperative Networks
Power Allocation Strategies in Energy Harvesting Wireless Cooperative Networks
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DOI：
10.1109/twc.2013.010213.130484
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发表时间：
2014-02-01
影响因子：
10.4
通讯作者：
Poor, H. Vincent
中科院分区：
文献类型：
--
作者：
Ding, Zhiguo;Perlaza, Samir M.;Poor, H. Vincent
在本文中，无线协作网络中，多个源-目的地对通过能量收集中继相互通信。本文的重点是中继的策略来分配收获的能量之间的多个用户和他们对系统性能的影响。具体来说，首先考虑了一种非协作策略，即利用从第i个源节点获取的能量作为中继发送功率，到达第i个目的节点，渐近结果表明其中断性能随对数SNR/SNR衰减.更快的衰减率，1/SNR，可以通过接下来提出的两个集中式策略来实现，其中基于水填充的策略可以以高复杂度为代价相对于几个标准实现最佳性能。基于拍卖的功率分配方案也被提出来实现系统性能和复杂度之间的更好的折衷。仿真结果证实了开发的分析结果的准确性。
In this paper, a wireless cooperative network is considered, in which multiple source-destination pairs communicate with each other via an energy harvesting relay. The focus of this paper is on the relay's strategies to distribute the harvested energy among the multiple users and their impact on the system performance. Specifically, a non-cooperative strategy that uses the energy harvested from the i-th source as the relay transmission power to the i-th destination is considered first, and asymptotic results show that its outage performance decays as log SNR/SNR. A faster decay rate, 1/SNR, can be achieved by two centralized strategies proposed next, of which a water filling based one can achieve optimal performance with respect to several criteria, at the price of high complexity. An auction based power allocation scheme is also proposed to achieve a better tradeoff between system performance and complexity. Simulation results are provided to confirm the accuracy of the developed analytical results.