Adaptive Power Control for Asymmetric Two-Way Amplify-and-Forward Relaying With Individual Power Constraints
Adaptive Power Control for Asymmetric Two-Way Amplify-and-Forward Relaying With Individual Power Constraints
复制标题
具有单独功率约束的非对称双向放大和转发中继的自适应功率控制
DOI：
10.1109/tvt.2014.2317748
复制
发表时间：
2014-04
影响因子：
6.8
通讯作者：
Massicotte Daniel
中科院分区：
文献类型：
--
作者：
Ji Xiaodong;Zhu Wei-Ping;Massicotte Daniel
研究了基于中断概率最小化的双向放大转发（AF）中继网络的自适应功率控制问题。与大多数现有的作品，我们的网络场景有不对称的流量要求，在网络中的每个终端受到一个单独的功率约束，除了总的功耗约束的网络。为了实现功率控制，假设瞬时或统计信道状态信息（CSI）在每个终端的发射机处可用。通过将整体功率控制问题划分为对应于不同功率约束的几个子问题，并使用与CSI一起的业务知识沿着，提出了两种称为短期和长期策略的功率控制策略，从而导致适合于某些业务要求和信道条件的中继和源处的个体发射功率的封闭形式的解决方案。仿真结果证明了所提出的功率控制策略的有效性。结果表明，在对称或非对称业务和信道条件下，短期策略在中断概率方面都能获得显著的性能增益，而长期策略更适合于非对称业务和信道条件。
This paper addresses the problem of adaptive power control of a two-way amplify-and-forward (AF) relaying network based on outage probability minimization. Unlike most of the existing works, our network scenario has asymmetric traffic requirements, and each terminal in the network is subject to an individual power constraint in addition to a total power consumption constraint of the network. To fulfill power control, instantaneous or statistical channel state information (CSI) is assumed to be available at the transmitter of each terminal. By dividing the overall power control problem into a few subproblems corresponding to different power constraints, and using the traffic knowledge along with the CSI, two power control strategies, called short- and long-term strategies, are proposed, leading to closed-form solutions for individual transmit powers at the relay and the sources that are adapted to certain traffic requirements and channel conditions. Simulation results are provided to demonstrate the effectiveness of the proposed power control strategies. It is shown that the short-term strategy can achieve a significant performance gain in terms of the outage probability, regardless of symmetric or asymmetric traffics and channels, and meanwhile, the long-term strategy is more appropriate to asymmetric traffic and channel conditions.
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