Ara
Toplam kayıt 12, listelenen: 1-10
A New Algorithm for High-Quality Ionogram Generation and Analysis
(Amer Geophysical Union, 2002)
Standard digital ionograms that are generated by fast Fourier transform or autoregressive modeling suffer from high interference levels due to other users of the HF channel which produce artifacts and distortion, hence ...
Spatio-Temporal Interpolation Of Total Electron Content Using A Gps Network
(Amer Geophysical Union, 2013)
Constant monitoring and prediction of Space Weather events require investigation of the variability of total electron content (TEC), which is an observable feature of ionosphere using dual-frequency GPS receivers. Due to ...
Regional Tec Mapping with Random Field Priors and Kriging
(Amer Geophysical Union, 2008)
Total Electron Content ( TEC) is an important parameter in monitoring ionospheric variability. In a given region, TEC can be obtained only by interpolation of measurements due to sparsity of the useful data. The lack of a ...
Estimation Of Hmf2 And Fof2 Communication Parameters Of Ionosphere F2-Layer Using Gps Data And Iri-Plas Model
(Ieee-Inst Electrical Electronics Engineers Inc, 2013)
F2-layer is the most important and characteristic layer of the ionosphere in the propagation of high frequency (HF) waves due to the highest level of conductivity in the propagation path. In this study, the relation of ...
Regional Model-Based Computerized Ionospheric Tomography Using Gps Measurements: Ionolab-Cit
(Amer Geophysical Union, 2015)
Three-dimensional imaging of the electron density distribution in the ionosphere is a crucial task for investigating the ionospheric effects. Dual-frequency Global Positioning System (GPS) satellite signals can be used to ...
Estimation Of Single Station Interfrequency Receiver Bias Using Gps-Tec
(Amer Geophysical Union, 2008)
Dual-frequency Global Positioning System (GPS) receivers present a plausible and cost-effective way of computing Total Electron Content (TEC). For accurate estimates of TEC, frequency-dependent satellite and receiver ...
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 ...
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 ...
Convexity Properties Of Detection Probability For Noncoherent Detection Of A Modulated Sinusoidal Carrier
(Ieee-Inst Electrical Electronics Engineers Inc, 2018)
In this correspondence paper, the problem of noncoherent detection of a sinusoidal carrier is considered in the presence of Gaussian noise. The convexity properties of the detection probability are characterized with respect ...
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 ...