Relay Network is most suited wireless communication technique for future Smart Grid, because it has a lot of advantages such as reliability against failures and offers redundancy, self-configuring and self-healing. For example if one nod or path is blocked, it can find a neighbour node, by different algorithms schemes. The purpose of this paper is to simulate wireless relay channel model in presence of impulse noise and computing the BER performance of channel data. It makes to be useful for a designer to predicting error and behaviour of a channel for optimum design, to be able choose a robust channel.

/pdf/effect-of-impulse-noise-on-wireless-relay-channel-1nrqaahoke.pdf

Effect of Impulse Noise on Wireless Relay Channel

Grounding systems must be maintained to protect equipment from lightning surges and other unintentional overvoltages occurring over power lines. However, in many cases it is difficult to maintain a reliability grounding system because unintended connections are sometimes made when connecting telecommunication lines between equipment, or when a cabinet accidentally comes into contact with the metal framework of the building. This paper describes a method of searching for the grounding route by using both amplitude and phase. The phase reference is also obtained from the injected signal, whose frequency is ten times that of the searching signal, so as to remove the reference line. The results indicate that this method can detect whether the observation point is connected directly or indirectly to the injection point.

http://ieeexplore.ieee.org/iel4/5417/14645/00667559.pdf

Searching method of grounding route in buildings using amplitude and phase

Searching Method of Grounding Route in Building using Amplitude and Phase

This paper describes the characteristics of impulse noise that is generated when a coaxial cable linking pieces of equipment at different ground potentials is connected or disconnected. The potential difference of equipment with a DC power supply system in a telecommunications center is simulated with an experimental model. The measured peak value of the impulse noise current is almost independent of any DC current on the coaxial cable produced by potential differences between the equipment and earth. An analysis model for adopting a SPICE program has been developed and the calculated waveforms agree well with the experimental results. A countermeasure to prevent the impulse noise current is also clarified.

http://ieeexplore.ieee.org/iel3/3965/11452/00523609.pdf

F. Takemoto

Papers

A study of impulse noise caused by connecting or disconnecting coaxial cable between equipment