Smart antenna application for satellite communication systems with space division multiple access
Two different beamforming approaches in space division multiple access for mobile satellite communications: switched-beam antennas and adaptive array antenna systems are considered. The hardware implementation of adaptive algorithm is considered as well.
Подобные документы
The implementation of beamforming and spatial diversity in Orthogonal Frequency Division Multiplexing systems. The differences of OFDM transmission over scenarios with different angular spread, which can viewed clearly from the base station antenna (BSA).
статья, добавлен 24.09.2016Simulation of a homogeneous linear array using a matrix of inverse-normalized least average squares for adaptive beam formation with a minimum of the bit error rate. Beam shaping with digital modulation of 16 quadrature amplitude modulation points.
статья, добавлен 04.11.2018The antenna elements are arranged along a circle arc and an ellipse arc. The expressions for the equivalent aperture of the antenna array. The values of the amplitude to excite the antenna elements on the basis of the genetic algorithm are obtained.
статья, добавлен 24.06.2016Methods of improving channels for the transmission of TV-signals. The algorithm for determining the colour gamut of a digital space. Means of determining the color of a point in the uniform color space. The properties of a adaptive model of channel.
статья, добавлен 26.03.2016The new morphological filter (NMF) algorithm for noise reduction in satellite TV picture. Concept of the NMF filter. Flow chart of the filtering process. Fine details preservation. Edges preservation evaluation. The hardware implementation of the NMF.
статья, добавлен 07.11.2018The path and loss - the dominant feature of the propagation environment. Operating frequency, antenna array size - one of the parameters, that plays a significant influence on overall system performance of the next generation wireless communications.
статья, добавлен 17.03.2022Are given the method of determination of angular parameters, which is used in micromechanical inertial-satellite systems, constructed by the method of compensation or based on the reduced Kalman filter. Measurement errors of angles are investigated.
статья, добавлен 22.12.2016Понятие, характеристика и архитектура WiMAX. Структура и формирование OFDMA (Orthogonal Frequency Division Multiple Access), распределение поднесущих. Обеспечение качества обслуживания. Управление мощностью и безопасностью. Передача вызова (хэндовер).
курсовая работа, добавлен 09.04.2010The development of a positioning algorithm on the board of a moving object using the information about the direction of signal reception from Global System for Mobile Communications base stations. The system as the effective method of positioning.
статья, добавлен 22.12.2016Radar Range Equation and Cross Section. Circular Polarization Components. Vector Effective Height. Mutual Coupling Between Antennas. Radiation Structures and Numerical Methods. Aperture Distributions and Array Synthesis. Dipoles, Slots and Loops.
книга, добавлен 25.11.2013Mobile devices use Wi-Fi for Internet connectivity. Low cost access points are required to allow data collection from of the Wi-Fi networks. These access points are part of hardware and software based solution that monitors of the various mobile devices.
статья, добавлен 06.05.2018The developed antenna system for use in measuring equipment. A technical description of the antenna system. The results of measurements and their comparison with the results obtained with the help of standard antennas included in the measuring equipment.
статья, добавлен 27.07.2021Characteristics of different flat multi-band antennas, their purpose, features of the production, and measurement. Description of antenna parameters, their advantages and disadvantages. The results of the modal and full-wave analysis of antennas.
контрольная работа, добавлен 05.04.2015Rules of quality assessment of the imaging systems image. Modern technologies of transmission and communication applications. Characteristics of multimedia apps designed for television systems. The essence of the principle of adaptive visualization.
статья, добавлен 26.03.2016История сотовой связи: стандарт GSM, CDMA (Code Division Multiple Access). Сравнительная таблица СDМА и GSM стандартов. Сети абонентского доступа. Основные технологии, входящие в семейство DSL. Принципы организации широкополосного абонентского доступа.
дипломная работа, добавлен 25.05.2018The damped oscillations in telemetry signals caused by the lack of homogeneity of the communication channel. Characteristic of communication channels between satellite and ground stations, receiving the BER parameter with reference to telemetry signals.
статья, добавлен 30.10.2018Cascaded structure for adaptive digital filtering used with the Normalized Least Mean Square Algorithm (CNLMS) that can be obtained by the expansion of Laguerre's polynomials. The filter structure using the Normalized Least Mean Square Algorithm.
статья, добавлен 04.11.2018A basic overview of the theory of planar antenna near-field measurements. Determination of far-field pattern from a near-field measurement. Advantages of this technique compared to far-field antenna measurement. Brief history of near-field scanning.
научная работа, добавлен 03.04.2012Analysis of the existing theoretical and applied aspects of decision support systems. Outlining of the features of using decision support systems in the field of strategic communications. Principles of the functional model of decision support systems.
статья, добавлен 16.06.2024The concept and the basic principles of electronics as a scientific field, the history of its development and modern achievements. Classification and types of antennas, basics principles of operation. The materials used in the manufacture of antennas.
учебное пособие, добавлен 25.11.2013Description wireless near field as trends in the development of applications for mobile devices. Features use of wireless communication for electronic payments, communication between the communication. Device communication and "smart" marketing posters.
статья, добавлен 27.09.2016Development of a system of digital wireless high-speed data transmission with orthogonal frequency division. Mathematical modeling and efficiency in the use of Fourier transform and finite Radon transform in a system with orthogonal frequency division.
статья, добавлен 26.06.2016Classification, general parameters and composition of REE. Distance Measurement Equipment. Radio Altimeters. Doppler Systems. Direction Finders. Radio Beacon Landing Systems. Design and Operation Principles of A/C Communication. Equipment Layout of REE.
курс лекций, добавлен 08.05.2013Asymptotic properties of an online gradient algorithm with a constant step size used to study in a neural network a model of nonlinear systems having a single hidden layer. Substantiation of the conditions guaranteeing the convergence of this algorithm.
статья, добавлен 14.09.2016The construction of electronic equipment principal schemes of communication systems and their workability control. Introduction to schematic capture. Working with multiple circuit windows. Simulation running indicator. Adding miscellaneous text, comment.
методичка, добавлен 11.10.2014