Full-Duplex Mode in Amplify-and-Forward Relay Channels: Outage Probability and Ergodic Capacity

Abstract

This paper investigates the outage probability and ergodic capacity performances for full-duplex mode in two-way amplify-and-forward relay channels. The two-way relay channels which consist of two source nodes and a single relay node working in full-duplex mode, are assumed as independent and identically distributed as Rayleigh fading. The self-interference or loop interference of the relay is unavoidably investigated for full-duplex mode. And the close-form expressions for the outage probability and ergodic capacity of full-duplex mode are derived, considering both loop interference and the coefficients of two-way relay amplify-and-forward channels. To further facilitate the performance of full-duplex mode, the half-duplex modes over different transmission time slots are analyzed. Simulation results point out the effect of loop interference on outage probability and ergodic capacity of two-way amplify-and-forward relay channels with full-duplex mode and show that full-duplex mode can achieve better performance in terms of capacity and even outperform half-duplex modes in the presence of loop interference.

Joint Beamforming Optimization and Power Control for Full-Duplex MIMO Two-Way Relay Channel

“…Only recently, the SI has been taken into account in the FD TWRC. In [22], the FD operation is introduced to the relay but two one-way relaying phases are required to achieve the two-way communication to avoid interference. A physical layer network coding FD TWRC is proposed in [23], where bit error rate is derived.…”

“…The first one is the conventional two-phase HD TWRC using the analog network coding, which is known to outperform the three-phase and four-phase HD schemes to provide throughput gain [35]; the second one is a two-phase one-way FD scheme and in each phase, the relay works in the FD mode [22]; the last one ignores the residual SI channel at the relay thus provides a performance upper bound that is useful to evaluate the proposed algorithms.…”

Power Control for Full-Duplex Relay-Enhanced Cellular Networks With QoS Guarantees

“…Furthermore, since there are two time slots in the the HD two-hop relaying communications, there is a factor of 1/4 in (12) and (13). From (12) and (13), the uplink and downlink transmissions are independent from each other, therefore the overall spectral efficiency maximization problem can be decomposed into two subproblems as follows:…”

“…The authors in [12] studied the outage probability of the end-to-end communication link in the multihop FD relaying systems with decode-and-forward relays. The authors in [13] investigated the outage probability and ergodic capacity of the FD two-way amplify-and-forward relaying channels.…”

Link-Level Performance Evaluation of Relay-Based Wimax Network

“…Meanwhile, increased system capacity was demonstrated by fully reusing the frequency in all relays while improving the per-user data rate in cell edges and heavily shadowed regions. Authors in [18] investigated the performances for fullduplex in two-way AAF relay channel consisting of two source nodes and a single relay node in terms of outage probability and ergodic capacity. They were able to establish better performance in the presence of loop interference in full duplex mode than in two non-orthogonal half duplex channels.…”