The protection of transmission lines is traditionally performed on-line, new pattern recognition techniques should be implemented quickly and flexibly. In this paper, a new approach to enhance the Transmission system distance relay co-ordination is presented. The approach depends on the apparent impedance loci seen by the distance relay during all possible disturbances. In a distance relay, the...

Hongyuan Gao*,Shibo Zhang,Ming Diao, and Yanan Du College of Information and Communication Engineering Harbin Engineering University Harbin, P. R. China [email protected], [email protected], diaoming@ hrbeu.edu.cn,[email protected] Abstract—It is a classical integer optimization difficulty to design optimal selection scheme in cooperative relay networks considering co-channel interfer...

This paper concerns two-hop communication over relay-assisted Block fading channel. It is assumed there is not a direct link between the transmitter and the affiliated destination and the communication occurs in two hops through the use of a relay, where the amplify and forward (AF) strategy is employed at this node. In this case, in a Rayleigh block fading channel, the optimal weight function ...

This paper presents a practical and effective novel approach to curve fit electromechanical EM overcurrent OC relay characteristics. Based on singular value decomposition SVD , the curves are fitted with equation in state space under modal coordinates. The relationships between transfer function and Markov parameters are adopted in this research to represent the characteristic curves of EM OC r...

A Wi-Fi has been able to accomplish great transmission due to its co-transfer mode. Each wireless network node has to rely on the way to achieve its mission of information transmission. In unattended sensing network environment, the relay process of how to select an appropriate relay nodes can adjust power consumption and communication quality, so it has attracted a lot of research attention an...

Relay-Based Circuits In article number 2200584, Dinesh Pamunuwa and co-workers report the first in-plane, single-contact 4-terminal relay a 1-to-2 demultiplexer built from only two relays compared to ten conventional 3-terminal relays. The technique of body biasing reduce pull-in voltage is also demonstrated, which has potential for major power savings as consumption varies quadratically with v...

From practical and theoretical viewpoints, performance analysis of communication systems by using information-theoretic results is important. In this paper, based on our previous work on Multiple Access Channel (MAC) and Multiple Access Relay Channel (MARC), we analyze the impact of a relay on the fundamental wireless communications concept, i.e., coverage region of MARC, as a basic model for u...

In this channel,we study rate region of a Gaussian two-way diamond channel which operates in half-duplex mode. In this channel, two transceiver (TR) nodes exchange their messages with the help of two relay nodes. We consider a special case of the Gaussian two-way diamond channels which is called Compute-and-Forward Multiple Access Channel (CF-MAC). In the CF-MAC, the TR nodes transmit their mes...

abstract—in this paper, the problem of secure transmission in two-hop amplify-and-forward (af) systems with an untrusted relay is investigated. to prevent the untrusted relay from intercepting the source message and to achieve positive secrecy rate, the destination-based cooperative jamming (dbcj) technique is used. in this method the destination sends an intended jamming signal to the relay. t...