Is Self-Interference in Full-Duplex Communications a Foe or a Friend?

Abstract

This paper studies the potential of harvesting energy from the self-interference of a full-duplex base station. The base station is equipped with a self-interference cancellation switch, which is turned-off for a fraction of the transmission period for harvesting the energy from the self-interference that arises due to the downlink transmission. For the remaining transmission period, the switch is on such that the uplink transmission takes place simultaneously with the downlink transmission. A novel energy-efficiency maximization problem is formulated for the joint design of downlink beamformers, uplink power allocations and transmission time-splitting factor. The optimization problem is nonconvex, and hence, a rapidly converging iterative algorithm is proposed by employing the successive convex approximation approach. Numerical simulation results show significant improvement in the energy-efficiency by allowing self-energy recycling.

MIMO-OFDM-Based Wireless-Powered Relaying Communication With an Energy Recycling Interface

“…Thus, the energy constrained relay can replenish its energy by harvesting energy from the signal composite of the source's energy signal and its own transmitted signal [19]. Using this protocol, different communication settings, e.g., SISO communication from the source-to-relay and MISO communication from the relay-todestination [23], single-input-multiple-output (SIMO) communication from the source-to-relay and MISO communication from the relay-to-destination [24], [25], SISO communication over both links [26]- [29], MISO communication over both links [19], [30], [31], SISO communication with multiple relays and relay selection [32], MIMO communication from the source-to-relay and MISO link from the relay-to-destination [33], and MIMO communication over both links [20], have been considered.…”

“…Remark 1. In (25) and (26), we approximate concave functions by other concave functions, which lead to the simple closed forms (36) and (37) and consequently, the analytical formula (40) for determining the Lagrange multiplier λ 1 .…”

Performance Analysis of a Full-Duplex MIMO Decode-and-Forward Relay System With Self-Energy Recycling

“…Joint transmission in uplink and downlink for a S-ER based FD system has been investigated in [33] for power allocation and data transmission. The impact of time split parameter on the EE of the S-ER based FD downlink system has been studied in [34]. Further [35] discusses a quality-of-service aware beamforming design in S-ER based FD relay system.…”

Self Interference Cancellation in Co-Time-Co-Frequency Full Duplex Cellular Communication

“…The energy harvested from the SIC model for FD communication. During the process of downlink transmission, energy harvested for FD communication [24]. Outcomes of paper [25] present the significant improvement in energy efficiency to allow recycling of the self-energy approach.…”