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.
The version of the modification of the classic bearing Capon's algorithm is presented to determine the position (the bearing and the distance) of the sources of radiation and their subsequent spatial selection as in the far and in the near and intermediate wave zones of the antenna array for analysis by the monitoring system.
The present paper concerns the circuit implementation of a phase radio direction finder for coordinate determination of radiation sources with harmonic signals. The use of sparse linear antenna arrays and radiation source are examined. The feature of this radio direction finder is an ability to operate in the frequency band. The basic relations for the direction-finding characteristics, which allow...
Theoretical possibilities of increasing capacity of a single-interval radio relay line by means of the physical phenomenon of phase front curvature of electromagnetic waves are presented. Location of repeaters of radio relay stations (RRS) in Fresnel zone is the main condition. The scheme for implementation of this method and results of modeling distances (bases) up to additional antennas of repeaters...
In this paper we consider the contribution of the using of directional antennas with angular, and full spatial (3 dimensional) selectivity in a remote radio unit (RRU) of a distributed antenna system (DAS) and the directional radiation at DAS in a sparse array with longitudinal radiation mode with the application of spatio-temporal matched filtration (STMF) on the wireless communication spectral efficiency.
The potentialities of determining the navigation object locations using the radio signal phase data in the global navigation systems are investigated. Mathematical expressions for the root mean square (RMS) of the measurement are found. Calculation results are presented.
The basic principles of designing and operation of MIMO systems based on space-time matched filtering (STMF) are considered. The advantages of MIMO-STMF systems over the MIMO systems with space-time coding (STC) is substantiated by comparing their spectral efficiency with the quality of the wireless transmission channel.
The design principles and creation experience of DVB-S digital satellite television radiosignal retransmitter prototype (RP) for 11 GHz for the purpose of students' education improving during digital television discipline studying in Institute of Telecommunication Systems of NTUU “KPI” are shown.
Approaches and technical solutions used for determining coordinates of radiation source with harmonic signal located in intermediate zone (Fresnel zone) of linear antenna array that is a part of phase coordinates determination system are considered.
The results of the analysis of possible using of space-time matched signal reception for access establishing to mobile communication systems and its capacity increasing, also comparison of capacity of systems with temporal and space-time matched signal reception are presented in this paper.
The unused potentials for harmonic signal radio-source (RS) coordinate determination in the existing phase direction-finders (PDF) with sparse antenna arrays in the Fresnel zone are shown. The approaches and scheme realizations for phase coordinate determination of radiosystems (PCDR) to estimate the bearing angle, the tilt angle for plane and spherical phase fronts and distance estimation to RS when...
The results of simulation of performance of a radio network with adaptive antenna by means of planning software of ICS Telecom radio network are given. The main purpose of antenna pattern adaptation is reduction of a level of co-channel interference in a base station receiver of a radio network.
The antenna system with controlled 3-dimentional signal space division constructions and characteristics for all radio frequency range investigation are reviewed in this work.
The disadvantages of the existing phase direction-finders (PDF) with three element antenna array (AA) are shown for the case when the harmonic signal radio source (RS) is located in Fresnel zone of the AA. Determination methods of the direction-of-arrival (DOA) and distance to the harmonic signal RS located in Fresnel zone of the PDF's AA are shown.
The increasing efficiency possibility of the generalized least-squares method to estimate the signal parameters in non-Gaussian measurement errors due to the transition using correlation observations to the dispersion relations is studied.
A new approach for selection of image moving objects with application of statistical optimization of moving object segments with application of conditional probability distribution is considered.
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.