On Performance of STAR-RIS-Enabled Multiple Two-Way Full-Duplex D2D Communication Systems

Abstract

This paper investigates performance of simultaneously transmitting and reflecting reconfigurable intelligent surface (STAR-RIS)-enabled multiple two-way full-duplex device-to-device (D2D) communication systems over Rayleigh fading channels under optimal and uncertain phase shift alignments. We derive closed-form expressions for outage probability (OP), sum throughput, ergodic capacity (EC) and energy efficiency. To gain insights, we quantify and reveal some useful guidelines for the performance behavior of the OP and the EC, such as diversity order and ergodic slope from high transmit power configuration. In addition, some critical points also deduced for the sum throughput and the system energy efficiency. Moreover, the impacts of the transmit power configurations, RIS deployments, allocating target data rate transmission, and the number of user deployments on the system performance are examined. Finally, we present some extensive simulations using Monte-Carlo method to corroborate the accuracy of the theoretical analysis.INDEX TERMS Simultaneously transmitting and reflecting reconfigurable intelligent surfaces (STAR-RISs), device-to-device (D2D) communication, full-duplex, two-way communication.

Fast Compressive Channel Estimation for MmWave MIMO Hybrid Beamforming Systems

“…1) Angular-Domain Reciprocity: Considering that the channels between a source and the TRX arrays have spatial correlations owing to the common scattering environment, the angular-domain reciprocity of the TRX channels holds due to the far-field planar wavefront assumption 2 . That is, when the distance between the TRX arrays and the source is far enough, the planar wavefront is assumed to make the TRX arrays' direction angles have a constant phase difference.…”

“…These studies considered the HD system. The research most relevant to our work, i.e., RIS-aided FD, was documented in [2], [29]- [32]. Through studying the outage probability, the authors in [29] demonstrated the superiority of the RIS-aided two-way systems compared to the oneway counterpart.…”

“…Recently, FD has brought new opportunities for a variety of applications, e.g., wireless power transfer [1], device-to-device systems [2], and integrated access and backhaul [3]. Despite the fact that FD offers a substantial advantage over half-duplex (HD), it is prone to self-interference (SI) due to the simultaneous transmission and reception of the transceiver (TRX).…”

“…In [31], multi-hop RIS-aided FD relay systems were investigated by deriving outage probability, average SE, and average bit error rate. Moreover, the FD system with the assistance of simultaneous transmission and reflection-based RIS was investigated in [2].…”

“…• Angular-Domain Reciprocity of FD arrays: A FD TRX is equipped with two antenna arrays, for respective transmission and reception, such that they are relatively near compared with a far source/scatter. Thus, some works [1], [2], [32], [33] made the assumption that the UL and DL channel matrices are reciprocal (for example, H D,2 = H H D,1 in Fig. 1.).…”