Open AccessMMSE‐based transmission method for wireless powered communication networks
Author(s) -
Xie Shaoguo,
Zhu Lvfu
Publication year - 2020
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2020.0143
Subject(s) - telecommunications link , minimum mean square error , computer science , beamforming , transmission (telecommunications) , wireless , energy (signal processing) , mathematical optimization , iterative method , algorithm , wireless network , real time computing , computer network , mathematics , telecommunications , estimator , statistics
In this study, the authors consider the user rate optimisation for wireless powered communication networks (WPCNs). To improve the user rate, a novel minimum mean square error (MMSE)‐based transmission method is proposed for WPCNs. For maximising the user rate, a user rate optimisation problem with MMSE constraints in the uplink transmission is formulated, which is considered as a convex optimisation problem. Considering the uplink power allocation, downlink energy beamforming, and the time ratio between uplink and downlink durations, a novel Newton iterative algorithm is proposed to obtain the optimal solution of the optimisation problem. Furthermore, the computational complexity of the MMSE‐based method is illustrated by theoretical analysis. Simulation results show that the MMSE‐based method can effectively improve the user rate compared to the zero‐forcing suboptimal method and time division multiple access‐energy harvesting method. Moreover, simulation results also show that the experimental runtime tends to coincide with the theoretical runtime in the MMSE‐based method.