An autostochastic system with parametric excitation

Kal'yanov, E. V.; Калинин, В. И.

doi:10.1134/1.1498780

Cited by 1 publication

(1 citation statement)

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“…It is a complex multimode resonator, and therefore it is impossible to single out one control parameter, the variation of which could change the operating modes of the generator without changing the nonlinear characteristic of its active element or the property of the oscillatory system [24]. This circumstance substantially complicates the search and adjustment of stochastic regimes, both in the experimental investigation of such a generator, and in the mathematical modeling of processes occurring in it [25]. Therefore, for the experimental Fig.…”

Section: Wideband Millimeter Wave Diode Noise Generatorsmentioning

confidence: 99%

Noise Radar of Millimeter Range

Колесов¹,

Myasin²

2018

RENSIT

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Practically all modern users of radar systems require an increase in the number and quality of information obtained from the observed space. Multifunctionality and efficiency of modern radar systems can be provided by the development and application of effective broadband technologies, unconventional digital algorithms and new adaptive applied solutions for the problem of processing signals and images in order to identify and recognize various classes of low-contrast objects. In the work on the basis of the IMPATT noise generator, a noise radar model working in the 8-mm range and having a frequency spectrum of the noise signal frequency up to 1 GHz was developed and investigated. The layout of the model includes an IMPATT noise generator module based on a one-diode circuit operating in an 8-millimeter wavelength range with an integrated output power of 40 mW and a non-uniform spectral characteristic of about 6 dB. Receiving and transmitting modules include antennas, waveguide elements: matching elements, impedance matcher, directional couplers, detector heads and attenuators. The computerized control unit provided program-algorithmic support of operating modes and double spectral processing of the signal. An experimental study of the noise radar model in the laboratory demonstrated a high resolution over a range of 15 cm (with an effective bandwidth of 800-900 MHz). The noise immunity of a radio engineering channel model based on a spread-spectrum signal was experimentally investigated. The maximum noise immunity for a radio channel with spreading was determined by the signalto-noise ratio at the receiver input, at which signal restoration becomes impossible for a given averaging time. In the noise immunity experiment, two types of interference were used: sinusoidal interference, close in frequency to the transmitted signal, and broadband interference matched to the transmitted signal by the spectrum. The results of experiments showed that for both types of interference, the maximum noise immunity is ~25 dB. Thus, ultra-wideband radar technologies based on noise signals are characterized by good electromagnetic compatibility, can be effectively used in the compilation of a radar portrait of an object, as well as in monitoring, positioning and control systems operating under conditions of intense interference.

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Section: Wideband Millimeter Wave Diode Noise Generatorsmentioning

confidence: 99%