Synthesis of Nyquist finite signals matched with a telephone communication channel
The problem of synthesis of optimum signals on an input and an output of a telephone channel of communication in system of a digital telephony is solved. The synthesised signals do not call the intersymbol distortions by consecutive transmission of binary messages. This result can be used at designing of modern intellectual modems with the boosted efficiency and a noise stability. Key words: telephone channel, consecutive transmission, synthesised signals.
VOLCHKOV V.P., SHURAKHOV A.A.
Studying the efficiency of linear precoding algorithms for MIMO systems
Usage of precoding algorithms with simple practical implementation for MIMO systems is studied. In the view of compromise between error probability and channel capacity the most effective algorithm is algorithm minimising mean squared error at the output of receiver. It is shown that liner precoding improves MIMO system performance when number of virtual subchannel less than number of antennas.
Key words: linear precoding, MIMO channel, optimal receiver.
BELOV L.A., KONDRASHOV A.S., ROZHKOV V.M., ROMASHENKO R.V.
Increasing the linearity and efficiency of power amplifiers for microwave broadband signals
The limiting possibilities of enhancement of power efficiency of the RF satellite communication power amplifier with AM/AM and AM/FM conversions are estimated, in consideration of restrictions on nonlinear distortion level at the expense of predistortion linearization of amplitude characteristics.
The computing model shows that the output power can be increased by 3 dB at the expense of the transition to a saturation mode with allowed nonlinear distortion level.
For the input QPSK signal with a pseudo-random data flow and leading edge smoothing by Nyquist filter, the outband radiation level caused by intermodulation distortion decreases by 17 dB at work near the effective saturation mode. Key words: AM/AM, AM/FM, amplitude, QPSK signal.
BESKHMELNITSYNA E.A., VARYUKHIN S.V., NAZAROV A.N., PANIN V.N.
Subscriber data base build-up in case of mobile and fixed operators' integration
The development of high technologies in the field of information communications and increasing customer expectations in the services determine the optimization of network architecture of modern operating companies. There are examples of different approaches to optimize the architecture of technology solutions in the field of combining different forms of representation of profiles and features of subscriber databases. However, the questions of typification and scaling of solutions above remain open, particularly in the context of stable All IP trend and network convergence of fixed and mobile operators.
The current state of subscriber data management in telecommunications networks and scenarios of subscriber database combining according to different architectures are examined in this article.
Key words: User Data Repository — UDR, Front End -FE, Back Еnd — BE, User Data Convergence — UDC, IP Multimedia Subsystem — IMS, Application Logic — AL, Repository Access Function — RAF, Generic User Profile — GUP, Uniform Resource Identifier — URI.
KUZMIN V.V., SEMASHKO A.V.
Methods of traffic control in a communication operator’s campus area networks
The main characteristics of campus area networks and the common approach to access to the Internet on a switching node of a telecoms operator are described.
In the article the several variants of the traffic control system organization in Linux are described. The task of performance evaluation and choosing the best approach in terms of these variants is solved
Key words: campus area network, traffic control, Internet, Quality of Service (QoS), bandwidth, queueing discipline for bandwidth management.
AGAFONOV S.Yu., DEMENTJEV O.V., SIVERS M.A.
Dependence of positioning accuracy on signal bandwidth in nanoNET/nanoLOC networks
This paper focused on the estimation of localization accuracy, and on the problem of it different interpretations. The article is a description of the localization methods in nanoNET/nanoLOC networks, the theoretical analysis of this question and some conclusions have shown also.
Key words: nanoNET/nanoLOC, accuracy of localization, Symmetric Double Sided Two Way Ranging.
KOZADAEVA L.A., SOLOVJEV S.P.
Using short telephone numbers in modern conditions
In the article discussed the features of short numbers using in fixed and mobile communication networks and IP networks. Presents the description of short numbers, for what purposes they are used, what resource room is occupied, as converted to regular routing number, for which there is an alternative to them, what difference between their use in networks of fixed, mobile and IP networks, what access to directory enquiry services.
Also international experience, practice in the Russia and proposals for the forthcoming allocation of numbers «1UVх1×2» in the local fixed-line networks RF presents.
Key words: short number, national number, routing, translation number, alternative ways, user terminal.
Evolution of the noosphere protection’s paradig
Author represents his response to theme of 42-nd World Economic Forum (WEF) in Davos: «The Great Transformation: Shaping New Models» and to Dmitry Medvedev’s statement made on research and practice conferention held in March 2012 in Moscow «Euroatlantic safety community: myth or reality» where key phrase is pointed out «For now it is myth and it should become reality». Base model of reaseach is evolution of noosphere — biosphere condition as a result of its principles and human mind interaction.
Key words: paradigm; noosphere protaction; nationalists; religions; UN (United Nations organization); human rights; society menaces; civilization menaces; electrical communication.
LOMAKOVA E.M., PAVLOV A.N.
Longitudinal electromagnetic radiation’s influence on managing biological processes
In this paper the transferring mechanism of biological tissues is described, longitudinal electromagnetic field is the main carrier of information in this transfer. Also the information properties of the water environment of cells, in which longitudinally «floating» plasmoid moves, are noted. Under the external and internal influences the communication mechanism changes due to changes of the work mechanism of DNA under the influence of dipolar molecules of new water clusters. Thus, the human body can be represented as a complex system of interconnected energy-channels. Key words: cluster, DNA, longitudinal electromagnetic waves, plasmoid, the cell membrane.
KOVAL V.V., SUKACH G.A., GELCHIN O.V., OSEREDKO E.A., DANILEVSKY S.V.
Statistical method of increasing the accuracy of polychannel monitoring of digital telecommunications' synchroinformation
Algorithms of a M-QAM signal’s phase synchronization with incomplete information
KUVSHINOV V.V., KULESHOV V.N.
Capability of phase noises' abatement in microwave VCO on coaxial ceramic resonators
CHERKASHIN A.A., UDALOV N.N.
Dynamic and spectral characteristics of linear frequency modulation sigma-delta synthesizers