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Mean square error of estimation of angular coordinates of super-broadband emitters in the systems of distributed measuring instruments of time of arrival of signals

Keywords:

S. N. Razin´kov – Dr.Sc. (Phys.-Math.), Senior Research Scientist, Leading Research Scientist, Research Test Center of Radio-electronic Struggle of Air Force Academy n.a. Prof. N.E. Zhukovsky and Yu.A. Gagarin (Voronezh) E-mail: razinkovsergey@rambler.ru M. Yu. Lukin – Post-graduate Student, Air Force Academy n.a. Prof. N.E. Zhukovsky and Yu.A. Gagarin (Voronezh) E-mail: bonvian81@mail.ru


In this paper with use of spectral representation of non-harmonic processes and partial characteristics of antennas the mean square error of estimation of angular coordinates of super-broadband sources of radio emission in the system of spatially distributed receivers with measuring instruments of time of arrival of signals is found. Dependences of accuracy of the carried-out measurements on the structure and parameters of signals for various types of the transmitting and receiving antennas are investigated. Regularities of its increase when processing the sequences of super-broadband impulses are analysed. It is shown that at the fixed base accuracy of measurement of angular coordinates of a radiator depends not only on its removal, but also on angular situation concerning each reception post. Dispersion of a bearing decreases with increase in value of integral of product of antenna gain and spectral density of energy of a radiator, effective surface of the receiving antenna and square of cyclic frequency in the equivalent band of a signal at the measuring instrument input. Possibilities of decrease in the error of direction finding of radiators at the expense of processing of sequences of super-broadband impulses are analysed. It is established that accuracy of an assessment of the direction on a source of super-broadband impulses se-quence raises more slowly, than under the linear law, due to transformation of their form during transmitting and receiving.
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