Begell House Inc.
Telecommunications and Radio Engineering
TRE
0040-2508
68
18
2009
STATISTICAL RADIO PHYSICSReducing the Amount of Recorded Data in a Noise Radar Using Spectral Processing Algorithms
1589-1600
10.1615/TelecomRadEng.v68.i18.10
Yu. A.
Shiyan
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
K. A.
Lukin
A.Ya. Usikov Institute for Radiophysics and Electronics of the National Academy of Sciences of Ukraine 12, Academician Proskura St., Kharkiv 61085, Ukraine
Preliminary results are given concerning the possibility of reducing the amount of data recorded in a noise radar with coherent spectral processing. It is shown that a reliable estimate of the autocorrelation function of a signal representing the sum of the sounding noise signal and the echo can be obtained, using a greatly reduced sampling frequency. It is noted that the suggested approach is more efficient for narrow-band signals.
Signal Detection in Gaussian Noise by Using Third-Order Test Statistics
1601-1612
10.1615/TelecomRadEng.v68.i18.20
The problem of detecting a deterministic signal embedded in the additive Gaussian noise is considered by using statistical decision theory, the Neyman-Pearson criterion and novel third-order test statistic (TS). Performances of signal detection for traditional energy second-order TS calculated as the peak value of the matched filter (MF) output and the third-order TS computed as the peak value of third-order moment function estimated for a random process observed at the MF output are investigated and compared between each other. The performance of signal detection is evaluated and studied by using binary hypothesis test, likelihood ratio and probability of detection curves calculated for the second- and third-order TSs. Results of computer simulation demonstrating the benefits of third-order test statistics comparing with conventional second-order statistics are represented.
SATELLITE COMMUNICATION SYSTEMSAlgorithms of Synthesis of Optimal Reactive Matching and Filtering Devices in Transistor Amplifiers. The Transistor is included between the MFD and the Load
1613-1621
10.1615/TelecomRadEng.v68.i18.30
A. A.
Naumenko
Military Institute of Radioelectronics, Voronezh
New links between the elements of the conductance matrix of matching and filtering devices (MFDs), optimal by the criterion of ensuring the given value of the signal gain and phase at a fixed frequency, are obtained. The links are used to find analytical expressions determining optimal values of MFD parameters by the above criterion.
Algorithms of Synthesis of Optimal Reactive Matching and Filtering Devices in Transistor Amplifiers. The Transistor is Included between the Source Signal and the MFD
1623-1630
10.1615/TelecomRadEng.v68.i18.40
A. A.
Naumenko
Military Institute of Radioelectronics, Voronezh
New interrelations between the elements of the conductance matrix of matching and filtering devices (MFDs), in which the transistor is included between the source signal and the MFD, are obtained. The interrelations are used to find values of the parameters of the MFD reactive elements, optimal by the criterion of ensuring the given values of the signal gain and phase at a fixed frequency.
Synthesis of Amplitude-and-Phase Manipulators on Resistive Elements with a Two-Pole Controlled Element The Controlled Element Is Included between the Resistive Four-Pole Network and the Load
1631-1641
10.1615/TelecomRadEng.v68.i18.50
V. I.
Gaidukov
Voronezh Higher Military Aviation Engineers School, Voronezh
It is demonstrated that the use of only resistive basis can ensure manipulation of the amplitude and phase of a high-frequency signal with specified module relations and phase differences in a specific frequency band. Expressions for the quality of a two-pole controlled element as a measure of difference between the elements of its conductance in two states, defined by two levels of a low-frequency controlling signal, and the relationship between the elements of a classical transmission matrix were obtained for the first time. The use of these expressions allows finding mathematical expressions for determining optimal values of resistors.
Study of the Method for Compensation of Systematic Errors in Direction-Finding of Radio Emission Sources That Is Based on Cauchy Integral Properties
1643-1650
10.1615/TelecomRadEng.v68.i18.60
Yu. A.
Rembovskii
Voronezh Military Technical College, Russian Federal Security Service, Voronezh ; NPP ZAO IRKOS, Moscow, Russian Federation
A. V.
Ivanov
Voronezh Military Technical School, Federal Security Guard Service of the Russian Federation, Voronezh, Russia
Yu. G.
Pasternak
Voronezh State Technical University, Voronezh, Russian Federation
A method for compensation of systematic errors indirectio n-finding of radio emission sources, based on the Cauchy integral, for recovery of the amplitude-and-phase structure of the electromagnetic field, measured in a finite number of points of a flat loop, located near a three-dimensional diffuser with a complicated geometrical shape, is studied. It is shown that the studied method can be used to reduce systematic errors in taking direction-finding of radio emission sources.
APPLIED RADIO PHYSICS: SPACE, ATMOSPHERE AND EARTH SURFACE RESEARCHAnisotropy of Random Molecule Velocity Induced by the Horizontal Wind. Experimental Checking of a Hypothesis
1651-1657
10.1615/TelecomRadEng.v68.i18.70
I. A.
Delov
Kharkov State Technical University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkov, 61166
Mykola I.
Slipchenko
Kharkiv National University of Radio Electronics, 14, Nauky Avenue,
Kharkiv, 61166, Ukraine
A. V.
Leonidov
Kharkiv National University of Radio Engineering and Electronics, 14, Lenin Ave, Kharkiv, 61166
The paper presents experimental data confirming the hypothesis put forward by the authors about the probability of the anisotropy of the random molecule velocity in the Earth atmosphere, that is associated with the horizontal wind. Numerous experimental data retrieved under various weather conditions, at various time of day and year prove that the random molecule velocity downwind is always lower than that upwind.
Joint Estimation of Remote Sensing Images and Mixed Noise Parameters
1659-1686
10.1615/TelecomRadEng.v68.i18.80
M. L.
Uss
National Aerospace University (Kharkov Aviation Institute), 17, Chkalov St., Kharkov, 61070
Benoit
Vozel
University of Rennes 1, Enssat, Lannion, 22300, France
Kacem
Chehdi
University of Rennes I, 6, Rue de Kerampont, 22 305 Lannion cedex, BP 80518, France
We address a joint task of remote sensing image enhancement and noise parameters’ estimation within a maximum likelihood framework. Estimation (blind determination) of noise parameters is an important operation in pre-processing images formed in varying or unknown imaging conditions. One peculiarity of our approach is that fractals (fBm-model) are used for modeling real-life images. Another peculiarity and advantage of the proposed approach consists in simultaneous evaluation of additive correlated noise variance and impulse noise occurrence probability. The core of our method is an iterative procedure of impulse noise detection and estimation of additive noise variance using pixels that are considered uncorrupted by impulses. Image model parameters are estimated as well with providing additional information for image interpretation. The designed method is tested for simulated and real life remote sensing images.