Reports of National Academy and the State Engineering University of Armenia. Series of Technical Sciences,- 2010y. – Vol.63, №2, — Page 181-191.

Step-by-step validation technique of constituent units of active phased antenna array at it sequential assembling is offered. The validation consists of electrical testing, electrical alignment and issue passports. In the beginning of everyone specifically-observed stage the checking of the final assembly units of the previous stage is provided. Note, the final assembly units of the previous stage are the component units of the specifically-observed stage unit, which should be tested. The mentioned checking of each final assembly unit of the previous stage is carried out in mode of in-phase and amplitude uniform excitation of its component units.

V.H. Avetisyan

IEEE Trans. on Antennas and Propagation, vol.58, № 6, June 2010, pp. 2149-2153.

A design is suggested for testing equipment of antennas operating in short millimeter waveband (SMW). Testing is based on amplitude and phase measurements over a plane in the near field of the antenna under test. Design solutions are offered for critical subsystems, including the mechanical scanner, the radio-measurement subsystem and the automatic control subsystem. The approach should allow near-field testing of SMW antennas to achieve high accuracies comparable to those of similar testing of centimeter waveband antennas

M.V. Markosyan

Proceedings of International Scientific Conference “Computer Science and Information Technologies” CSIT 2009./Yerevan, RA, September28 — October2, 2009- p.463-465.

The paper provides analysis of different methods of signaling automated system based on different techniques of telecommunication means. Shows that most effective way is using GPRS service, and soused solution based of it, which is in realization process.

M.V. Markosyan, A.N. Grigoryan, A.L. Grigoryan

Proceedings of International Scientific Conference “Computer Science and Information Technologies” CSIT -2009./Yerevan, RA, September28 — October2, 2009- p.447-449.

Problems of design of Expert System of Diagnosis (ESD) are considered. It is suggested to develop an expert dynamic system of diagnosis for the control of the state of different hardware-in-the-loop complex suites for which the model of one of the possible ways of design of the latter is given.

S. Abrahamyan, M. Kyureghyan

Proceedings of International Scientific Conference “Computer Science and Information Technologies” CSIT 2009./Yerevan, RA, September28 — October2, 2009- p.109-111.

This paper presents a linear cryptanalytic attack against the SAFER family of block ciphers. Linear cryptanalysis is a statistical well-known-plaintext attack that explores (approximate) linear relations between plaintext, ciphertext and subkey bits. These linear relations apply only to certain key classes. The results show that by considering non-homomorphic linear relations, more rounds of the SAFER block cipher family can be attacked. The new attacks pose no threat to any member of the SAFER family.