Browsing Elektrik - Elektronik Mühendisliği Bölümü Makale Koleksiyonu by Title
Now showing items 27-46 of 67
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Investigation of Total Electron Content Variability Due to Seismic and Geomagnetic Disturbances in the Lonosphere
(Amer Geophysical Union, 2010)Variations in solar, geomagnetic, and seismic activity can cause deviations in the ionospheric plasma that can be detected as disturbances in both natural and man-made signals. Total electron content (TEC) is an efficient ... -
Joint Detection and Decoding in the Presence of Prior Information with Uncertainty
(Ieee-Inst Electrical Electronics Engineers Inc, 2016)An optimal decision framework is proposed for joint detection and decoding when the prior information is available with some uncertainty. The proposed framework provides trade-offs between the average inclusive error ... -
Lonolab-Map: An Automatic Spatial Interpolation Algorithm for Total Electron Content
(Tubitak Scientific & Technical Research Council Turkey, 2018)Investigation of the variability of total electron content (TEC) is one of the most important parameters of the observation and monitoring of space weather, which is the main cause of signal disturbance in space-based ... -
Lonolab-Ray: A Wave Propagation Algorithm for Anisotropic and Inhomogeneous Ionosphere
(Tubitak Scientific & Technical Research Council Turkey, 2017)A high-frequency (HF) radio wave propagation model based on ray tracing for anisotropic, inhomogeneous, and time-varying ionosphere is developed to form the basis for a user-friendly modular algorithm. The algorithm ... -
Mode Separation And Direction Of Arrival Estimation In Hf Links
(Amer Geophysical Union, 2003)[1] Estimation of arrival angles and incoming signals is a challenging problem for HF channels where the signals are correlated and the separation between the signals can be as low as a couple of degrees. In this paper, a ... -
Multipath Separation-Direction Of Arrival (Ms-Doa) With Genetic Search Algorithm For Hf Channels
(Elsevier Sci Ltd, 2009)Direction-of-Arrival (DOA) defines the estimation of arrival angles of an electromagnetic wave impinging oil a set of sensors. For dispersive and time-varying HF channels, where the propagating wave also suffers from the ... -
Nvis Hf Signal Propagation In Ionosphere Using Calculus Of Variations
(2019)Modeling Near Vertical Incidence Sounding (NVIS) High Frequency (HF) signal propagation in the ionosphere is important. Because, ionosondes which are special types of radars probing the ionosphere with certain HF frequencies ... -
On The Design And Performance Analysis Of Low-Correlation Compact Space-Multimode Diversity Stacked Microstrip Antenna Arrays For Mimo-Ofdm Wlans Over Statistically-Clustered Indoor Radio Channels
(Spolecnost Pro Radioelektronicke Inzenyrstvi, 2015)The support of high spectral efficiency MIMO spatial-multiplexing communication in OFDM-based WLAN systems conforming to IEEE 802.11n standard requires the design and use of compact antennas and arrays with low correlation ... -
On-Line Application Of Shem By Particle Swarm Optimization To Grid-Connected, Three-Phase, Two-Level Vscs With Variable Dc Link Voltage
(Mdpi, 2018)This paper is devoted to an otablen-line application of the selective harmonic elimination method (SHEM) to three-phase, two-level, grid-connected voltage source converters (VSCs) by particle swarm optimization (PSO). In ... -
Online User-Friendly Slant Total Electron Content Computation From Iri-Plas: Iri-Plas-Stec
(Amer Geophysical Union, 2014)Slant total electron content (STEC), the total number of free electrons on a ray path, is an important space weather observable. STEC is the main input for computerized ionospheric tomography (CIT). STEC can be estimated ... -
Optimal Joint Modulation Classification And Symbol Decoding
(2019)In this paper, modulation classification and symbol decoding problems are jointly considered and optimal strategies are proposed under various settings. In the considered framework, there exist a number of candidate ... -
Optimal Power Allocation For Average Detection Probability Criterion Over Flat Fading Channels
(Ieee-Inst Electrical Electronics Engineers Inc, 2017)In this paper, the problem of optimal power allocation over flat fading additive white Gaussian noise channels is considered for maximizing the average detection probability of a signal emitted from a power constrained ... -
Optimal Stochastic Signaling Under Average Power And Bit Rate Constraints
(Ieee-Inst Electrical Electronics Engineers Inc, 2018)The optimal stochastic signaling based on the joint design of prior distribution and signal constellation is investigated under an average bit rate and power constraints. First, an optimization problem is formulated to ...