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 ...

 We consider a TDMA cellular multihop network where relaying – via wireless terminals that have a good communication link to the base station – is used as a coverage enhancement technique. Provided that the subscriber density is not very low, relaying via wireless terminals can have a significant impact on coverage, capacity, and throughput. This is mainly due to the fact that the signals only...

Relaying has been proposed to support users suffering from high shadowing or high interference and therefore being not able to receive high data rates. With adaptive relaying, a higher Modulation and Coding Scheme (MCS) can be used in order to increase the feasible data rate. The investigation of relaying techniques widely has concentrated on information theoretical methods. Instead, this paper...

An incremental relaying protocol based on the adaptive decode-and-forward (DF) relaying scheme is presented for a cooperative wireless network composed of one source, K relays, and one destination and with binary frequency-shift keying (BFSK) modulation. In order to reduce error propagation and satisfy bit error rate (BER) requirement, the proposed protocol employs two thresholds. One threshold...

259 Lines are protected by overcurrent-, distance-, or pilot-relaying equipment, depending on the requirements. Overcurrent relaying is the simplest and cheapest, the most difficult to apply, and the quickest to need readjustment or even replacement as a system changes. It is generally used for phaseand ground-fault protection on station-service and distribution circuits in electric utility and...

This thesis presents novel multihop relaying schemes capable of incorporating multihop diversity in routing calculations for centrally scheduled systems using adaptive modulation and coding. The routing algorithms can factor multihop selection combining and multihop maximal ratio combining (MRC) in digital or hybrid digital and analog relaying systems (HDAR). These diversity schemes do not requ...

We study the outage probability performance of hybrid protocols in relay-assisted, non-orthogonal multiple access (NOMA)-based power line communication. In particular, we consider two networks with source, relay and destination nodes, namely, cooperative relaying NOMA (CR NOMA) single-stage (SS NOMA). derive closed-form expressions for probabilities three techniques, decode-and amplify-and-forw...

The paper considers various relaying strategies for wireless networks. We comparatively discuss and analyse direct transmission, conventional “multihop” relaying, and the novel concepts of cooperative relaying from the viewpoint of system level performance. While conventional relaying exploits pathloss savings, cooperative relaying additionally takes two inherent advantages of relay-based syste...

We develop and analyze low-complexity cooperative diversity protocols that combat fading induced by multipath propagation in wireless networks. The underlying techniques exploit space diversity available through cooperating terminals’ relaying signals for one another. We outline several strategies employed by the cooperating radios, including fixed relaying schemes such as amplify-and-forward a...

“Amplify and Forward” and “Decode and Forward” are the two main relaying functions that have been proposed since the advent of cooperative communication. “Soft Decode and Forward” is a recently introduced relaying principle that is to combine the benefits of the classical two relaying algorithms. In this work, we thoroughly investigate soft relaying algorithms when convolutional or turbo codes ...