Items of № 9, 2012

The Electrosvyaz Magazine is one of the leading science & technical magazines in Russia.

MIROSHNIKOV E.А.

Influence of frequency division multiple access partial signal level instability on satellite link’s interference protection

Computer simulation of Frequency Division Multiple Access partial signals transmission through TWT (travelling-wave tube) is produced. Data about variability of output capability balance and signal-to-non linearity noise merit dependence on instability of input partial signal level is derived. Said data usage in quantitative assessment of satellite link’s interference protection reduction ( or increase) is shown.
Key words: multiple access, nonlinearity, instability, interference protection.


 

RYZHKOV A.V., SAVCHUK A.V.

Network synchronization practice during the synchronization standards reloading

The results of PTP clients field test represented in this paper give the way of SDH islands and access network synchronization practice under crucial revision of synchronization standards during IP/MPLS/Ethernet packer transport incorporating without network performance and QoS degradation.
Key words: time synchronization, frequency synchronization (or syntonization), precision time protocol, ordinary master clock (MC), ordinary slave clock (SC), packet networks, packet delay variations, Ethernet, SDH islands.


 

KLIMENKO M.I.

Increase of capacities addition efficiency in monoblock chained adders under their partial use

Possibility of transformation of monoblock chained adders 5х1 transistor television transmitters in adders 4х1 and 3х1 without capacity loss is almost shown. Criteria of such transformation are formulated and the technology of its realisation is presented. Key words: 5х1 transistor television transmitters,  4х1 transistor television transmitters, 3х1 transistor television transmitters.


 

LADANOV M.V., VEDISCHEV A.M., KIZIMA S.V., LAVROV G.V.

Radio communication planning on short waves for the main radio path


 

TZVETKOV S.A., CHERTOK D.V., YAKIMENKO V.S., YANSHIN S.N.

Radio-frequency spectrum conversion in Russia: myths and realities


 

LOBOV V.A., YANSHIN S.N., KOROTKOV M.V.

Use of radio frequency bands by 3G radio nets based on technological neutrality principle


 

KHAZANOVA M.A.

Some issues of sound-broadcasting signals’ digitization

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