Smart Grid refers to an intelligent grid that employs modern information and telecommunication technologies to meet the challenges relating to the power delivery in the future. These challenges are due to, among others, increased use of renewable energy and power supply reliability requirements of modern digital society. In order to fully realise the Smart Grids a new kind of approach for the p...

The evolution of software architecture, including operating systems and applications, spans from batch systems on big iron to today’s hand-held devices, and is now reaching into ubiquitous computing objects as evident in efforts such as JINI and Bluetooth. In digital telecommunication, the origins came from PCM and Ethernet, via OSI’s X.25 to fast packet-switching realized in Frame Relay and AT...

In this work, the end-to-end performance of an amplify-and-forward multi-antenna infrastructure-based relay (fixed relay) system over flat Rayleigh fading channel is investigated. New closed form expressions for the statistics of the received signal-to-noise ratio (SNR) are presented and applied for studying the outage probability and the average bit error rate of the digital receivers. The res...

In this work, we investigate the end-to-end performance of a multiple-input-multiple-output (MIMO) relay system over a flat Rayleigh fading channel to study the performance in terms of outage probability (OP) and the average bit error rate (ABER) of the digital receivers. New closed form expressions for the statistics of the received signal-to-noise ratio (SNR) for both amplify-and-forward and ...

The aim of the relay coordination is that protection systems detect and isolate the faulted part as fast and selective as possible. On the other hand, in order to reduce the fault clearing time, distance protection relays are usually equipped with pilot protection schemes. Such schemes can be considered in the distance and directional overcurrent relays (D&DOCRs) coordination to achieve faster ...

We consider a slow fading two-hop relay channel where a source terminal communicates with a destination through a layer of relays. First, we introduce the notion of time-varying distributed rotation and propose a linear relaying scheme called rotate-and-forward (RF). The main idea is to create a time-varying channel and to convert the spatial diversity to time diversity. It is shown that this s...

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The transmission of signals in a hybrid satellite-terrestrial system (HSTS) in the presence of co-channel interference (CCI) is considered in this study. Specifically, we examine the problem of amplify-and-forward (AF)-based relaying in a hybrid satellite-terrestrial link, where the relay node is operating in the presence of a dominant co-channel interferer. It is assumed that direct connection...

In this paper, an iterative incremental relay selection (IIRS) scheme is considered for wireless cooperative networks in order to increase the reliability of transmission. Different from the conventional incremental relay selection which incrementally selects a best relay for only one iteration; the IIRS scheme iteratively applies the incremental relaying and relay selection processes. To evalu...