'Institute of Electrical and Electronics Engineers (IEEE)'
Doi
Abstract
Power splitting (PS) scheme design is one of the most
important challenges in simultaneous wireless information and
power transfer (SWIPT) based two-way multiplicative amplifyand-forward
(AF) relay networks. In this letter, we propose
a novel dynamic asymmetric PS (DAPS) scheme to minimize
the system outage probability by exploiting the asymmetric
instantaneous channel gains between the relay node and the
destination nodes. As the formulated optimization problem is
a non-convex problem and difficult to solve, we reformulate it as
a fractional programming problem and propose a Dinkelbachbased
iterative algorithm to obtain the optimal asymmetric PS
ratios. Both the analytical and simulation results demonstrate
that the proposed DAPS scheme with the same channel state
information overhead can significantly reduce the system outage
probability as compared with the existing static symmetric PS
scheme
