Wireless Energy Harvesting Two-Way Relay Networks with Hardware Impairments

被引：13

作者：

Peng, Chunling ^{[1
]}

Li, Fangwei ^{[1
]}

Liu, Huaping ^{[2
]}

机构：

[1] Chongqing Univ Posts & Telecommun, Chongqing Key Lab Mobile Commun Technol, Chongqing 400065, Peoples R China

[2] Oregon State Univ, Sch Elect Engn & Comp Sci, Corvallis, OR 97331 USA

来源：

SENSORS | 2017年 / 17卷 / 11期

基金：

美国国家科学基金会;

关键词：

energy harvesting; two-way relay; hardware impairments; ergodic capacity; optimal power splitting; POWER TRANSFER; INFORMATION; PERFORMANCE; PROTOCOLS; DESIGN;

D O I：

10.3390/s17112604

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

This paper considers a wireless energy harvesting two-way relay (TWR) network where the relay has energy-harvesting abilities and the effects of practical hardware impairments are taken into consideration. In particular, power splitting (PS) receiver is adopted at relay to harvests the power it needs for relaying the information between the source nodes from the signals transmitted by the source nodes, and hardware impairments is assumed suffered by each node. We analyze the effect of hardware impairments on both decode-and-forward (DF) relaying and amplify-and-forward (AF) relaying networks. By utilizing the obtained new expressions of signal-to-noise-plus-distortion ratios, the exact analytical expressions of the achievable sum rate and ergodic capacities for both DF and AF relaying protocols are derived. Additionally, the optimal power splitting (OPS) ratio that maximizes the instantaneous achievable sum rate is formulated and solved for both protocols. The performances of DF and AF protocols are evaluated via numerical results, which also show the effects of various network parameters on the system performance and on the OPS ratio design.

引用

页数：29

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