Full-Duplex Versus Half-Duplex Amplify-and-Forward Relaying: Which is More Energy Efficient in 60-GHz Dual-Hop Indoor Wireless Systems?
Full-Duplex Versus Half-Duplex Amplify-and-Forward Relaying: Which is More Energy Efficient in 60-GHz Dual-Hop Indoor Wireless Systems?
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DOI：
10.1109/jsac.2015.2481211
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发表时间：
2015-09
影响因子：
16.4
通讯作者：
Zhongxiang Wei;Xu Zhu;Sumei Sun;Yi Huang;Linhao Dong;Yufei Jiang
中科院分区：
文献类型：
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作者：
Zhongxiang Wei;Xu Zhu;Sumei Sun;Yi Huang;Linhao Dong;Yufei Jiang
我们提供了一个全面的能源效率（EE）分析全双工（FD）和半双工（HD）放大转发（AF）中继辅助60 GHz的双跳室内无线系统，旨在回答的问题，中继模式是绿色的（更节能），并解决EE优化的问题。我们开发了一种机会中继模式选择方案，其中机会主义地选择具有一阶段自干扰消除（被动抑制）或两阶段自干扰消除（被动抑制+模拟消除）或HD中继的FD中继，连同传输功率适配，以在给定信道增益的情况下最大化EE。提出了一种低复杂度的联合模式选择和EE优化算法。我们显示了一个反直觉的发现，一个相对宽松的最大传输功率约束，FD中继与两个阶段的自干扰消除是最好的FD中继与一个阶段的自干扰消除和HD中继，从而在一个更高的优化EE。一个完整的范围内的功耗源被认为是合理化我们的分析。不完善的自我干扰消除继电器，漏极效率和静态电路功率EE的影响进行了研究。仿真结果验证了我们的理论分析。
We provide a comprehensive energy efficiency (EE) analysis of the full-duplex (FD) and half-duplex (HD) amplify-and-forward (AF) relay-assisted 60-GHz dual-hop indoor wireless systems, aiming to answer the question of which relaying mode is greener (more energy efficient) and to address the issue of EE optimization. We develop an opportunistic relaying mode selection scheme, where FD relaying with one-stage self-interference cancellation (passive suppression) or two-stage self-interference cancellation (passive suppression + analog cancellation) or HD relaying is opportunistically selected, together with transmission power adaptation, to maximize the EE with given channel gains. A low-complexity joint mode selection and EE optimization algorithm are proposed. We show a counter-intuitive finding that with a relatively loose maximum transmission power constraint, FD relaying with two-stage self-interference cancellation is preferable to both FD relaying with one-stage self-interference cancellation and HD relaying, resulting in a higher optimized EE. A full range of power consumption sources is considered to rationalize our analysis. The effects of imperfect self-interference cancellation at relay, drain efficiency, and static circuit power on EE are investigated. Simulation results verify our theoretical analysis.