Incorporating relaying techniques into Automatic Repeat reQuest (ARQ) mechanisms gives a general impression of diversity and throughput enhancements. Allowing overhearing among multiple relays is also a known approach to increase the number of participating relays in ARQs. However, when opportunistic amplify-and-forward (AF) relaying is applied to cooperative ARQs, the system design becomes non...

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In this paper, we propose various kinds of two-way multi-antenna relaying with simultaneous wireless information and power transfer (SWIPT) and investigate their performance. Specifically, we first consider a two-way relay network where two single-antenna end nodes communicate with each other through a multi-antenna relay node that is energy constrained. This relay node harvests energy from the...

—Low-Voltage Powerline Communications (LV PLC) is a favorable information exchange scheme for many Smart Grid (SG) applications. In this paper we focus on the broadband dual-hop relaying systems over LV PLC channel in which the relay node operates in either Amplify-and-Forward (AF) or Decode-and-Forward (DF) relaying protocol. The closed-form expressions of capacities for non-cooperative and c...

Distance relays are used to protect EHV and HV Transmission lines. Over the past decades many algorithms have emerged for digital distance relays. These are based on the calculation of the transmission line impedance from the relaying to fault points. In this paper a novel method for digital distance relaying is proposed. In the method the tracking procedure is implemented. The method uses the ...

In wireless networks, link budget can be relaxed by delivering the data using intermediate relay nodes. Although the immediate purpose of relaying is to obtain gain against path loss, it can also create spatial diversity due to the broadcast nature of the wireless medium. The objective of this work is to design and analyze relaying protocols that induce e2e cooperative diversity for ad hoc and ...

Relaying (1–3) has been considered as a paradigm for improving the quality of service (i.e., bit-error-rate, data rate and coverage) in wireless networks. In this work, we study a two-hop relay channel in which each node can have multiple antennas. It is well-known that utilizing multiple-input multiple-output (MIMO) links can significantly improve the transmission rate (see e.g. (4; 5) and ref...

In this paper, we study virtual full-duplex (FD) buffer-aided relaying to recover the multiplexing loss of halfduplex (HD) relaying in a network with multiple buffer-aided relays, each of which has multiple antennas, through opportunistic relay selection and beamforming. The main idea of virtual FD buffer-aided relaying is that a source and a relay simultaneously transmit their own information ...

Intelligent reflecting surface (IRS) has recently emerged as a new solution to enhance wireless communication performance via passive signal reflection. In this letter, we unlock the potential of IRS controller in relaying information and propose novel IRS-assisted system with both reflection active relaying. Specifically, jointly optimize time allocations for decode-and-forward (DF) by beamfor...