Performance Analysis for BDPSK Modulated SWIPT Cooperative Systems With Nonlinear Energy Harvesting Model

IEEE Access

Victor C. M. Leung¹  Miaowen Wen²  Fei Ji²  Yizhi Feng² 

[1] Department of Electrical and Computer Engineering, The University of British Columbia, Vancouver, Canada;School of Electronic and Information Engineering, South China University of Technology, Guangzhou, China;

关键词: Simultaneous wireless information and power transfer (SWIPT);    cooperative wireless networks;    differential modulation;    nonlinear energy harvesting;   

DOI  :  10.1109/ACCESS.2018.2860283

来源: DOAJ

【 摘 要 】

In this paper, we investigate the performance of simultaneous wireless information and power transfer cooperative amplify-and-forward communication systems with binary differential phase-shift keying modulation. The piece-wise linear energy harvesting (EH) model that captures the nonlinear input-output characteristic of the EH circuit is considered. We derive a novel and closed-form expression of the probability density function (PDF) for the harvested power of the nonlinear EH receiver. Based on this, we further derive the expressions for the PDF of the received signal-to-noise ratio of the cooperative link and the average biterror-rate of the systems. Numerical results confirm the validity of the proposed analytical results. It is shown that the system performance is significantly overestimated when the ideal linear EH model is used in the place of the practical nonlinear EH model. An opposite result to the linear EH model that the system performance is monotonically improved with the increase of the distance between the location of the relay node and the source node is also demonstrated.

【 授权许可】

Unknown