TY - JOUR
T1 - Wireless information and power transfer in two-way relaying network with non-coherent differential modulation
AU - Xu, Weikai
AU - Yang, Zheng
AU - Ding, Zhiguo
AU - Wang, Lin
AU - Fan, Pingzhi
N1 - Funding Information:
This paper is partially funded by the European Union-FP7 (CoNHealth, Grant No. 294923), the Natural Science Foundation of Fujian Province of China (No. 2013J01256), the National Basic Research Program of China (973 Program No. 2012CB316100), the National Science Foundation of China (NSFC, No. 61032002), and the 111 Project (No. 111-2-14). The authors would like to express great appreciation to the reviewers of the paper for their valuable comments on improving the quality of this paper.
Publisher Copyright:
© 2015, Xu et al.; licensee Springer.
PY - 2015/12/16
Y1 - 2015/12/16
N2 - In this paper, we consider a denoise-and-forward (DNF) two-way relay network (TWRN) with non-coherent differential binary phase-shift keying modulation, where a battery-free relay node harvests energy from the received radio frequency (RF) signals and uses the harvested energy to help the source nodes for information exchange. Based on the power splitting (PS) and time switching (TS) receiver architectures, power splitting relaying (PSR) and time switching relaying (TSR) protocols at relay are studied. In order to investigate the effect of power allocations on two source nodes, power splitting coefficient and time switching factor at relay on performance, the two proposed protocols are analyzed and the bit error rate (BER) expressions of end-to-end system are derived. Based on these expressions, the optimal power of sources, the power splitting ratio and the time switching factor are obtained via the numerical search method. The simulation and numerical results provide practical insights into the effect of various system parameters, such as the power splitting coefficient, the time switching factor, sources to relay distances, the noise power, and the energy harvesting efficiency on the performance of this TWRN. In addition, the results show that the PSR protocol outperforms the TSR protocol in terms of throughput under various network geometries.
AB - In this paper, we consider a denoise-and-forward (DNF) two-way relay network (TWRN) with non-coherent differential binary phase-shift keying modulation, where a battery-free relay node harvests energy from the received radio frequency (RF) signals and uses the harvested energy to help the source nodes for information exchange. Based on the power splitting (PS) and time switching (TS) receiver architectures, power splitting relaying (PSR) and time switching relaying (TSR) protocols at relay are studied. In order to investigate the effect of power allocations on two source nodes, power splitting coefficient and time switching factor at relay on performance, the two proposed protocols are analyzed and the bit error rate (BER) expressions of end-to-end system are derived. Based on these expressions, the optimal power of sources, the power splitting ratio and the time switching factor are obtained via the numerical search method. The simulation and numerical results provide practical insights into the effect of various system parameters, such as the power splitting coefficient, the time switching factor, sources to relay distances, the noise power, and the energy harvesting efficiency on the performance of this TWRN. In addition, the results show that the PSR protocol outperforms the TSR protocol in terms of throughput under various network geometries.
KW - Denoise-and-forward, bit error rate
KW - Differential modulation
KW - Two-way relay network
KW - Wireless information and power transfer
UR - http://www.scopus.com/inward/record.url?scp=84929190359&partnerID=8YFLogxK
U2 - 10.1186/s13638-015-0368-4
DO - 10.1186/s13638-015-0368-4
M3 - Article
AN - SCOPUS:84929190359
SN - 1687-1472
VL - 2015
JO - Eurasip Journal on Wireless Communications and Networking
JF - Eurasip Journal on Wireless Communications and Networking
IS - 1
ER -