METHODS OF INCREASE NOISE IMMUNITY TELECOMMUNICATION SYSTEMS OF DATA TRANSMISSION MAINS ON OF THE POWERLINE
Journal Title: Вісник Національного університету "Львівська політехніка", серія "Радіоелектроніка та телекомунікації" - Year 2015, Vol 818, Issue 2015
Abstract
Considered the influence of industrial noise on symmetric lines PowerLine at their use to create multichannel systems. Proposed compensation method to reduce the impact of industrial noise on such systems. For today actively developing telecommunication system, which used PowerLine as a medium of data transfer – boundless information environment, what is used in every home. The main problem in creating specific telecommunication systems is a significant level of external noise that takes from the environment and affect the PowerLine, which in fact is the antenna system. The most significant obstacle is the external noise of natural origin (especially lightning) and industrial noise, which create electric ignition systems of automobiles, fluorescent lamp, lifts, welding machines and other electrical appliances. Industrial noise is a complex process with continuous spectrum, which has a log-normal distribution. Obviously, the spectrum of industrial noise rather broad and does not go beyond 1 GHz. House power system within one electrical substation can be seen as a complex antenna system with multiple parts. To substantially reduce the impact of external interference in symmetrical two-wire line, which is appropriate to use the PowerLine proposed in [8] the method of compensation. It uses special devices that receiving external noise and transmitted it’s in the supply line inverted antiphase signal which compensates interference line taken directly from the environment. That is the total noise spectral density of signal lines equal to 0 and will be made full compensation of noise, which is possible only in theory. But in practice implementation errors do not give the possibility to make full compensation interference, but a significant reduction can be achieved.105 Connection to line two or more devices of noise compensation through a distance will ensure evenly magnitude compensating signal interference. The values of the distance between the devices compensate for interference, and their level at the receiver input terminals require additional research and calculations. The results can also be useful when creating telecommunication systems with air lines.
Authors and Affiliations
A. Makarenko, G. Grynkevych
Keywords
Related Articles
- EP ID EP458508
- DOI -
- Views 127
- Downloads 0
METHOD OF ESTIMATION OF INDEXES OF EFFICIENCY OF THE RADIO ELECTRONIC COMPLEX SYSTEM MONITORING OF AIR SPACE
In this paper a method for estimation efficiency indexes for algorithm behavior of radioelectronic complex system of airspace monitoring is developed. This method takes into account the structure of radioelectronic compl...
INVESTIGATION OF STABILITY OF PARAMETRIC AMPLIFIERS IN AN ENVIRONMENT MAOPCs
The paper considers the question of the research of assessment of the stability of linear periodically time-variable circuits by the frequency symbolic method. The function system MAOPCs, which is based on the frequency...
CDMA2000 CHANNEL MODELING BASED ON THE GILBERT–ELLIOT ALGORITHM WITHIN URBAN INFRASTRUCTURE
Any radio channel transferring information is a subject to data corruption. Especially it’s important for 3G mobile networks that use high frequency carrier wave and significantly increased data rate in channel. In this...
DEVICE FOR THE INVESTIGATION OF THE INFLUENCE OF LOW FREQUENCY RADIATION FIELD ON BIOLOGICAL OBJECTS
The question of creation of a device for the formation of an electric and magnetic ultra-low frequency (ULF) radiation field is considered, which in the future will be used to study its effect on living biological object...
INVESTIGATION OPTICAL FIBER BY DIGITAL HOLOGRAPHIC INTERFEROMETRY METHOD
The purpose of this paper is investigation the possibilities of applying methods of digital holographic interferometry to study the internal structure of the optical fiber, including the distribution of the refractive in...