Performance Enhancement for Full-Duplex Relaying with Time-Switching-Based SWIPT in Wireless Sensors Networks

Full-duplex (FD) with simultaneous wireless information and power transfer (SWIPT) in
wireless ad hoc networks has received increased attention as a technology for improving spectrum
and energy efficiency. This paper studies the outage performance for a SWIPT-based decode-andforward
(DF) FD relaying network consisting of a single-antenna source S, a two-antenna relay
R, and a multi-antenna destination D. Specifically, we propose four protocols, namely static timeswitching
factor with selection combining (STSF-SC), static time-switching factor with maximal ratio
combining (STSF-MRC), optimal dynamic time-switching factor with selection combining (ODTSFSC),
and optimal dynamic time-switching factor with maximal ratio combining (ODTSF-MRC) to
fully investigate the outage performance of the proposed system. In particular, the optimal timeswitching
factor from the ODTSF-SC and ODTSF-MRC methods is designed to maximize the total
received data at the destination. In this context, we derive exact closed-formed expressions for all
schemes in terms of the outage probability (OP). Finally, the Monte Carlo simulations are conducted
to corroborate the theoretical analysis’s correctness and the proposed schemes’ effectiveness.