A review of methods to increase the capacity of wireless communication systems, including microwave links with the existing limitations of the frequency resource is presented.

In this article we consider the problem of constructing an automated quality assessment system of environmental impact assessment: mathematical tool of formalization, software, computing experiment.

The purpose of this paper is to develop sources of 2000W secondary power supply implementing zero voltage switching (ZVS) technology. The paper consists of several parts considering various aspects of the problem of power supply designing. In the first part, the results of the analysis of information materials and assessment of the major parameters of some foreign power supplies are presented. In the second part, options of circuitry implementation of power supplies and possible ways of using zero voltage switching are considered. In the third part, the results of power supply model mockup are considered. In the fourth part, features and examples of zero voltage switching implementation technology are considered.

In this paper, the technological route for the production of DC/DC converter chips is considered. The possibility of rapid adjustment in basic operations gives free scope for improvement in the parameters and characteristics of manufactured chips. Practical example of computer-aided design of DC/DC converter is presented. It resulted in production of converter chip 4.6 × 4.25 mm topology.

On the basis of vector algebra device, vector representation of symbol-symbol interference parameters of signals with PRM and PM for channels with multipath propagation is produced. Detailed analysis of SSI formation for double-beam model channel is carried out. Comparative analysis of SSI signals with PRM and PM for different modulation ratio is presented.

In this paper we describe how to use the method of theoretical estimation of computer capacity for evaluation and comparison of super-computers and cluster systems. We present a detailed description of peculiarities of applied method to estimation of super-computers. The results are compared with the results of different benchmarks.

We propose the algorithm of fast enumeration for main problems of coding theory. These problems are: 1) encoding of binary words with given number of ones and its special case when number of ones equals number of zeroes; 2) encoding of run-length-constrained words. This problem is of interest to magnetic recording and some other fields; 3) encoding of the Grassmannian space elements and encoding of the Dyck language words. We apply the modification of method of fast enumeration of combinatorial objects proposed by B. Ryabko to stated problems. Our algorithm has less computational complexity than other known algorithms do.

In this article, the proposed approaches to simulation of continuous processes via E-network in order to build analytical and simulation models from the methodological position are considered. Principals for implementing continuous processes reproduction via E-networks using Block Function Diagram programming technology are presented in this paper. Construction of continuous processes dynamic models is based on the state space method and is implemented using E-network algorithmic simulation scheme.