Attenuation of electromagnetic waves by vegetation canopies in the 100–10000 MHz frequency band
The role and significance of attenuation by vegetation in remote sensing. The model of vegetation as a continuous medium. Effective dielectric constant of vegetation. Methods of measurements of attenuation. The directions of future research needs.
Подобные документы
Familiarization with the concept of field-effect transistors. Laying out circuit boards and mounting RF devices. Classes of operation, forms of modulation, biasing, and operating in a pulse mode. The basic factors affecting low power amplifier design.
учебное пособие, добавлен 25.11.2013A novel method of digital modulation with a high spectral efficiency, called the Angle Modulated M-ary Quadrature Amplitude Modulation. The main advantage of EM-MQAM is an ability to transmit a multilevel MQAM constellation as a constant envelope signal.
статья, добавлен 13.05.2011Вивчення принципів віддаленого налаштування та адміністрування комп’ютерної мережі. Аналіз набору служб, призначених для адміністрування мережі: Telnet, Remote Administrator, File Manager. Віддалене управління засобами Telnet. Настройка File Manager.
курсовая работа, добавлен 25.06.2015The 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 24.09.2016The 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 17.03.2022- 81. Plane wave diffraction by two-dimensional gratings of inductive and capacitive coupling elements
Frequency selective structures in the form of two-dimensional gratings with non-resonant elements are investigated. Expressions the main for the reflection and transmission coefficients for the gratings consisting of thin metal rectangles are obtained.
статья, добавлен 04.11.2018 Розгляд питання щодо наявності детермінованого зв’язку між кутовими параметрами складових сигналу з ортогональним частотним поділом (OFDM-сигналу). Виявлення аналітичного зв’язку між початковими фазами сигналів. Схематичне подання формування OFDM-сигналу.
доклад, добавлен 23.01.2018Description of crowdsourcing technologies of public communication in global and regional modern political spaces. Their significance as a means of peaceful, non-violent conflict resolution and reduction of social tensions in various parts of the world.
статья, добавлен 21.01.2022The article is devoted to the researches the accuracy of the measurement of range by the multifrequency phase method. The sources of error of probing signals are identified: instability of frequency probing signal, error of measurement amplitude.
статья, добавлен 27.07.2016Применение ЭВМ (пакет OrCAD) для построения и анализа схемы пассивной линейной RLC цепи. Создание моделей полупроводниковых приборов с помощью Model Editor. Исследование шумовых и температурных свойств усилительного каскада на биполярном транзисторе.
методичка, добавлен 10.08.2013Global Positioning System as one of history's most exciting and revolutionary developments. Use of this technology in the aviation, automotive and transport industry. Detect, decode, process satellite signals - the main functions of GPS receivers.
статья, добавлен 10.10.2016Идентификация параметров spice-модели диода с помощью программ Parts, PSpice Model Editor, Micro-Cap. Нелинейные и линеаризованные схемы замещения с включением источников внутреннего шума. Уравнения, описывающие статический и динамический режимы.
методичка, добавлен 24.03.2014Development an approach of routing control which does not demand any special facilities of the ISP or telecommunication channels. The 2-criteria model of the routing tables estimation and the real-time algorithm for the corresponding optimization problem.
статья, добавлен 13.02.2018- 89. Chebyshev filter
General immunity of radio, the passage of noise through the path of the device. Calculated the data transmission speed and the duration of single elements, bandwidth filters transmission and reception, the effective value of interference in the channel.
курсовая работа, добавлен 12.12.2014 The essence of the process of acquiring effective communication skills in the network space in the context of ensuring personal information security. The individual's assimilation of the rules and practices common in the communication environment.
статья, добавлен 03.05.2023The studying the latest model of simultaneous interpretation booths in the market - iBooth. The best acoustic environment for the distinction of various languages. The principal benefits of innovative digital technology to modern conference systems.
презентация, добавлен 16.05.2014The main advantages and importance of mastering verbal and non-verbal communication. Using and defining the relationship between verbal and non-verbal means in business communication. Analysis of effective verbal and non-verbal communication tools.
статья, добавлен 25.06.2021Consideration of the linear model of the closed type speaker. Investigation of the sound velocity and diaphragm displacement. Major features method of organizing feedback electromechanical (EMOS) in loudspeakers. The main characteristics of the feedback.
статья, добавлен 21.06.2016The 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 22.12.2016Development and practical approbation of the methodology for designing hybrid neural networks. Analysis of the effectiveness and conditions of use of this technique. Research and evaluation of the possibility of using input signals of different types.
статья, добавлен 14.09.2016Development of a intelligent hybrid models for short-term forecasting of the expected operationg condition EPS, based on the combined use of ANN and HHT. Analisys of dinamic of change in EPS parameters operating conditions. Experimental calculations.
статья, добавлен 23.06.2013Digital printing is currently one of the most popular continuously evolving printing methods in the world. Today, every printing house has digital printing machine. Just a few decades ago, digital presses were just an addition to traditional equipment.
статья, добавлен 16.06.2024Using databases of geospatial data. The space-disseminated information for determine the location of moving objects. Methods for creating base map data in dynamical systems, taking into account the properties of digital maps and geodetic precision.
статья, добавлен 24.03.2016Need to find optimal solutions in the design and deployment of wireless networks. The impact of environmental parameters on the transmission channel networking standard Wi-Fi, to enable access to new information and communication services formats.
статья, добавлен 24.06.2016The use of two-step hybrid asymptotic method, based on the methods of perturbation theory and phase integrals for solutions of the nonlinear problem of oscillation of the aircraft. Direct numerical integration of the equations of the original problem.
статья, добавлен 22.12.2016