Source and Relay Precoding for Full-Duplex MIMO Relaying With a SWIPT-Enabled Destination

This letter investigates the source and relay precoder design for full-duplex multiple-input multiple-output relay systems, where simultaneous wireless information and power transfer is enabled at the destination. The objective is to design the precoders such that the end-to-end performance can be optimized. Different from existing schemes, a novel dual-objective function is adopted in this letter. The proposed precoders yield closed-form solutions and avoid iterative algorithms. Moreover, our design is applicable when the system suffers from the residual loop-interference. Simulations show that the proposed scheme enables an efficient way to optimize information-decoding and energy-harvesting performances.