Valeri V. Gladun

Radio thermal images of natural objects in 8-mm and 3-mm ranges

This paper describes passive radiovision systems in 8-mm and 3-mm ranges. It contains short description of the systems, data processing algorithms and points out problems specific to multi-ray systems. Image enhancement methods are briefly considered. Several examples of radio thermal images of natural objects are presented herein.

Superresolution and coherent phenomena in multisensor systems of millimeter-wave radio imaging

In this paper we consider some aspects of radiovision systems.At the beginning,we examine the coherent phenomena in multisensor systems, and what benefits have the systems based on this phenomena. Later we discuss the applications of calculated antenna pattern for,multi-channel radiovision system and show,that it can be used in some tasks if experimental one is not available. In the last section we consider superresolution methods,which allow to enhance resolution of the radio-thermal images btained,and exceed the bounds of the Rayleigh limit.The results of several data processing series are provided.

Problem of the radiovision system resolution improvement in millimeter-wave range

At the Faculty of Physics of Moscow State University experimental researches of the working radiovision systems on the base of phased antenna array and radio optical systems with the sensors rules are carried out. Since 1980 the system of Sun radio observation in 3-mm wavelength range created by the specialists of Bauman Moscow State Technical University is exploited. Investigations in the mathematical modeling of image formation systems in wide wavelength range with different receiving schemes and with distortion compensation task solution and super-resolution are conducted by mathematician and physicists.

Problems of precise air-spatial monitoring

The designers of modern devices of vision prefer to choose a scanning step of receiving system antenna with some less size than the main lobe of Point Spread Function (PSF). They tell such systems are good constructed. However there is a problem of additional increase of resolution for such well constructed receiving system. This problem is naturally connected with improvement of mathematical models. The report is devoted to development and applications of local-linear method of additional enhancement of resolution for such receiving system in radio vision and optics.

Optimization of radiovision systems in millimeter-wave range

Method of optimization is considered to improve resolution and noise properties of millimeter-wave radio vision system. Conditions of optimal measurements are realized by coincidence of bandwidths both of signals and device.

Additional enhancement of resolution in multiray radio vision systems

The designers of modern devices of vision prefer a scanning step of receiving system antenna with a smaller size aperture than the main lobe pattern of the Point Spread Function. This report is devoted to the development and application of a local-linear method of additional resolution enhancement for such a receiving system in radio vision and optics.

3-mm wave range passive radio imaging system of high resolution

Radio vision systems on the basis of radio optical devices combined with sensor measurements were created. Mathematical modeling of the super-resolution regimes for the systems were carried out for different receiving schemes and varied levels of applied distortion. The main purpose of this report is the comparison of resolution from an 8-mm wave and 3-mm wave radiometric range system.

Superresolution in multiray radio vision systems with small signal/noise ratio

Methods of mathematical modeling of multiple ray radio vision systems of image formation with antenna pattern distortion compensation in millimeter wavelength range were developed and improved at the Faculty of Physics of the Moscow State University. At present, intensive experimental investigations of multiple-ray radio vision systems on the basis of radio-optical devices with the sensor measurements are being carried out. The main purpose of the report is demonstration of the local-linear method capability of super-resolution on the model pictures with a small signal/noise ratio.

Multiple-ray passive radiovision systems of millimeter-wave range

Methods of mathematical modeling of multiple rays radiovision systems of image formation with antenna pattern distortion compensation in millimeter wavelength range are developed and improved at the Faculty of Physics of Moscow State University. At the moment intensive experimental investigations of the working multiple rays radiovision systems on the base of phased antenna array and radio- optical systems with the rules and sensors frames are carried out. In the report the possibilities of developed dialog program complex for multiple rays systems of image registration and formation with following antenna pattern distortions compensation are shown on the base of the real data.

11-element linear array of sensors for passive radio-imaging systems of 8-mmw range

Multielement radiometric matrix of sensors of millimeter-wave range was developed for radio-imaging in the range. Use of the matrix allows to transfer from mechanical scanning of observed scenes to electronic one and significantly decrease time of observation.