The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
This paper continues the series of works devoted to the investigation of leaky-wave antenna based on layered rectangular waveguide with periodic transverse slots in broad face. Previously developed wavenumber calculation technique has been adapted for analysis of slotted sandwich waveguide with three layers at least. Velocity factor dependencies are presented for partially filled slotted rectangular...
This paper reflects the results of developed sync system investigation, which is based on optimal receiver by average risk minimum criterion. This receiver is intended to detect the reflected radar impulse under conditions of Gaussian and Johnson noises. During a digital experiment we used M-sequence with single pulse phase-shift keying as a reference signal. The use of a developed self-tuning system...
This paper is devoted to the development of calculation algorithm in order to determine the significance of different a priori information on the quality of USB-keyboard compromising emanation recovery. The system was investigated under condition of non-Gaussian interferences with Johnson distribution defining the industrial noise. As the calculation result according to developed algorithm based on...
A binary communication channel under the action of additive Gaussian and non-Gaussian broadband and narrow-band interferences is considered in order to identify the possibilities of using the method of bispectral analysis for the detection and recovery of the useful signal. The discrete random process with SL Johnson distribution is taken as non-Gaussian noise. The estimation of periodic signal detection...
This paper is devoted to experimental confirmation of early suggested parameters calculation technique for leaky-wave antenna based on partially filled rectangular waveguide. A design of prototype is described, conclusion about boundaries of its application is made. Experimental values of the scattering matrix elements, far field radiation patterns, measured in anechoic chamber, are given. The correctness...
This paper is devoted to development of nonlinear filter of Markov processes for JPEG images at the stage of preprocessing, allowing to increase the filtration quality when off-line and on-line image recovering. The analysis of wide interference class affecting the image is held. The proper processing algorithm is developed for each kind of noise. Evaluating the synthesized algorithm effectiveness...
It is proposed to develop a quasi-optimal RF-pulse signal receiver algorithm based on Markov theory of nonlinear filtering. Evaluating the synthesized algorithm efficiency is founded on a semi-natural experiment of processing the signal mixed with Johnson or white Gaussian noises. The developed algorithm has been simulated in Simulink MatLab. The experiment was implemented on the installation of the...
This paper is devoted to experimental confirmation of early suggested parameters calculation technique for leaky-wave antenna based on covered rectangular waveguide with transverse slots. A design of prototype is described, conclusion about boundaries of its application is made. Experimental values of the scattering matrix elements, far field radiation patterns, measured in anechoic chamber, are given...
A quasi-optimal receiving algorithm for the RGB signals based on the Markov theory of nonlinear filtering is designed. Evaluating the synthesized algorithm effectiveness is founded on the image processing digital simulation of the signal mixed with the Johnson and white Gaussian noises. Examples of filter operation with different value of signal to noise ratio are presented. A comparative analysis...
The potential noise immunity of binary message extraction is investigated when white Gaussian noise or one of three Johnson's noise is acting. The informative signal detection probability by developed optimal receiving algorithm according to the criterion of the mean risk minimum is used as Indicator of noise immunity assessment. The developed algorithm has been simulated in Simulink software on conditions...
A model representing an asset price change as the sum of several random functions with different correlation properties is proposed. Its adequacy is substantiated and boundaries of its application are described. The random character of deterministic component of asset price set is defined on the basis of empirically established properties of the asset price and the exponential moving average graphs...
Receiver algorithm of ultra-wideband signals based on Markov theory of nonlinear filtering is designed. Analysis of receiver efficiency rests on the digital simulation of signal mixed with white Gaussian noise. It is shown that the developed algorithm has better quality in comparison with adaptive filtering algorithm and allows processing the ultra-wideband signal with speeds up to 100 Mbit/s.
A quasi-optimal nonlinear Markov receiver for airborne radar based on waveguide-slotted antenna is developed. The problem of quality signal receive in waveguide-slotted antenna with frequency beam scanning in wide range of angle is solved. A receiver algorithm is synthesized and simulated. Developed receiver demonstrates advantage compared with existing adaptive systems.
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.