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Journal Electromagnetic Waves and Electronic Systems №12 for 2014 г.
Article in number:
Criteria of a choice of approximating distributions of amplitude fluctuations of the reflected radar signals
Keywords: earth's surface the probability density of instant values of the amplitudes of reflected signals approximation of distributions
Authors:
A.V. Belinsky - Leading Engineer, Yu.Ye. Sedakov Research Institute of Measuring Systems (Nizhniy Novgorod). E-mail: 1515niiis@rambler.ru
Abstract:
The radar sensing method of a spreading surface is used extremely widely. Moreover, all modern systems of location of aircraft provide an opportunity to work on the mode mapping. It is known that the signals reflected from the earth's surface are fluctuating. Because the distribution laws of fluctuating amplitudes of the reflected signals are used quite arbitrarily, there is an actual problem of justification of a choice and definition of accurate criteria of use of these or those laws of distribution. The paper discusses the basic laws of distribution, with which can be made approximation of almost any of the experimental density distribution of the amplitudes of the reflected radar signals, the clear criteria and procedure for selection of the approximating distribution are provided, and also a method based on the criterion of choosing the most appropriate law density distribution are described. The last has a great practical interest and finds the mass of real appendices for creation of mathematical models of the reflected signals at creation of various systems of a radar-location, which consider type of a spreading surface, conditions of distribution of signals, height of movement and sensing angle.
Pages: 19-31
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