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Energy Efficiency Maximization of Full-Duplex Two-Way Relay With Non-Ideal Power Amplifiers and Non-Negligible Circuit Power. (arXiv:1801.01709v1 [cs.IT])
来源于:arXiv
In this paper, we maximize the energy efficiency (EE) of full-duplex (FD)
two-way relay (TWR) systems under non-ideal power amplifiers (PAs) and
non-negligible transmission-dependent circuit power. We start with the case
where only the relay operates full duplex and two timeslots are required for
TWR. Then, we extend to the advanced case, where the relay and the two nodes
all operate full duplex, and accomplish TWR in a single timeslot. In both
cases, we establish the intrinsic connections between the optimal transmit
powers and durations, based on which the original non-convex EE maximization
can be convexified and optimally solved. Simulations show the superiority of
FD-TWR in terms of EE, especially when traffic demand is high. The simulations
also reveal that the maximum EE of FD-TWR is more sensitive to the PA
efficiency, than it is to self-cancellation. The full FD design of FD-TWR is
susceptible to traffic imbalance, while the design with only the relay
operating in the FD mode 查看全文>>