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Journal Antennas №10 for 2014 г.
Article in number:
The receiving phased antenna array adaptation for electronic countermeasures of radio communication in case of several space interferences presence
Keywords: adaptive receiving antenna array radiation pattern spatial and temporary characteristics main lobe side lobes weight coefficient radiation pattern minimum radio interference direction
Authors:
D. D. Ganzy - Dr.Sc. (Eng.), Head of Department, JSC - SRC "Vigstar". E-mail: ntc4@vigstar.ru
P. V. Rusakov - Head of Sector, SRIRE Center, JSC "MSDB "Almaz-Antey?. E-mail: rp258rt@rambler.ru
G. I. Troshin - Dr.Sc. (Eng.), Professor, Leading Research Scientist, JSC - SRC "Vigstar"
Abstract:
Spatial adaptation of a radio interference to an alarm and interfering situation is more effective than the extended now organizational, power and alarm methods as depth of suppression of an interfering signal doesn't depend on the transfer speed of protected information and characteristics of a radio interference signal. As a rule, submission of the adaptive directional pattern (DP) by means of "eigen" patterns formed in the direction of arrival of a radio interference and subtracted from the main DP of the antenna is used when assessing the overall performance of an adaptive antenna array. Obtaining "zero" values in the direction of arrival of radio interferences at such approach is based on the decision of system of the equations for weight coefficients by very difficult and bulky transformation and calculation of eigenvalues and eigenvectors of a correlation matrix represented in the form of the sum a matrix of the receiver noise and matrixes of external radio interferences. However use of the Pistolkors equation allows to simplify significantly and define existential characteristics of an adaptive antenna array without operation of diagonalization of a correlation matrix and calculation of its eigenvalues and eigenvectors. In work the version of the solution of the equation of Pistolkors for an adaptive antenna array with eight radiators is considered at simultaneous action of three interfering signals with various directions of arrival. Dependence of the DP form on directions of arrival of interfering signals, depth of minima in DP in the direction of radio interferences action, their power and time of adaptation of the antenna in a simulated alarm and interfering situation is defined as a result of the equation decision. The decision of system of the differential equations was carried out by means of a solver of the ordinary differential equations ode15s with attraction of a package of the applied MATLAB 7.10.0 programs.
Pages: 33-36
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