Leonid Lazko - Academia.edu (original) (raw)

Papers by Leonid Lazko

У статті наведені результати дослідження формування дальнісних портретів у радіолокаційних систем... more У статті наведені результати дослідження формування дальнісних портретів у радіолокаційних системах побудови зображень. Запропоновано підхід до реконструкції дальнісного профілю. На основі введеного припущення про локальну інваріантність функції розсіювальної точки показано можливість ефективної реконструкції функції розсіюючої здатності з прийнятого радіо-локаційною системою сигналу. The investigation results of the processes of range portrait formation in radar imaging systems are presented in the paper. The approach for reconstruction of the range profile was proposed. The efficient restoration possibility of scattered ability from received signals by radar was presented taking into account of the assumption about local invariance of system function.

2010 20th International Crimean Conference "Microwave & Telecommunication Technology", 2010

The principles of construction and technical implementation of multichannel integrated remote sen... more The principles of construction and technical implementation of multichannel integrated remote sensing systems based on the separate channels which work at splitted spectral bands were developed.

Известия высших учебных заведений. Радиоэлектроника

Рассмотрены методы устранения дифракционных искажений в радиотехнических системах построения изоб... more Рассмотрены методы устранения дифракционных искажений в радиотехнических системах построения изображений с разреженными антенными решетками. На первом этапе решена задача синтеза геометрии антенной решетки, на втором — обработка изображений нелинейным методом с ограничениями. Проведено имитационное моделирование процесса формирования и восстановления изображений в радиометрической системе.

2008 International Conference on "Modern Problems of Radio Engineering, Telecommunications and Computer Science" (TCSET), 2008

In this paper approach of sparse antenna array geometry construction based on combining prime sub... more In this paper approach of sparse antenna array geometry construction based on combining prime sub-geometry are proposed.

11th International Conference 'Microwave and Telecommunication Technology'. Conference Proceedings (IEEE Cat. No.01EX487)

The new spheres of remote sensing system applications make demands for improving of the mass-size... more The new spheres of remote sensing system applications make demands for improving of the mass-size and economic characteristics of airborne portable radio-imaging systems, i.e. large aperture systems. First of all these demands are concerned with antenna structures. Application of sparse antenna structures offers the possibility of decreasing the number of antenna feeder elements which improves the above-mentioned performances of these

Modern Problems of …, 2008

There is considered the methodology of constructing the multispectral remote monitoring systems c... more There is considered the methodology of constructing the multispectral remote monitoring systems combining the advantages of radio and optical observation channels within a common hardware/software realization.

MIKON 2008 - 17th International Conference on Microwaves, Radar and Wireless Communications, 2008

In present paper there was done analysis of possibility to use local correlation at pixel level d... more In present paper there was done analysis of possibility to use local correlation at pixel level data fusion in order to increase effectiveness of multilevel information fusion method.

2022 IEEE 16th International Conference on Advanced Trends in Radioelectronics, Telecommunications and Computer Engineering (TCSET)

2012 22nd International Crimean Conference "Microwave & Telecommunication Technology", 2012

Objects detection and separation approach based on spots grouping on a radar image into a single ... more Objects detection and separation approach based on spots grouping on a radar image into a single object is shown. There is considered an approach based on grouping of some “spots” acquired from a separate object with assumption of spatial relations of these spots.

2009 19th International Crimean Conference Microwave & Telecommunication Technology, 2009

An investigation of influence of thermal infrared (IR) band on the result of multilevel data fusi... more An investigation of influence of thermal infrared (IR) band on the result of multilevel data fusion in passive multichannel satellite system Landsat 7 ETM+ was carried out.

The image formation models in active and passive channels of radiomonitoring systems in their sim... more The image formation models in active and passive channels of radiomonitoring systems in their simultaneous operation are considered. The image formation process was subsequently simulated through each of the channel and the acquired data were integrated to update the information content of acquired images.

2011 VIII International Conference on Antenna Theory and Techniques, 2011

In this work the principles of beamforming structures building in integrated monitoring systems a... more In this work the principles of beamforming structures building in integrated monitoring systems are considered. An examples of possible combinations with application of one electrodynamic structure of channels of passive and active location and optical and radar channels are shown.

The paper deals with modern problems of digital remote sensing and the possible ways to improve t... more The paper deals with modern problems of digital remote sensing and the possible ways to improve the spatial resolution. New ways of data capturing that allow the use of sub-pixel technology to take pictures of a higher spatial resolution are describe. Theoretical and experimental results show that the proposed methods increase resolution of satellite images

2021 IEEE International Conference on Information and Telecommunication Technologies and Radio Electronics (UkrMiCo), 2021

Sparse antenna array allows finding compromise between spatial resolution and number of antenna e... more Sparse antenna array allows finding compromise between spatial resolution and number of antenna elements. Existing optimal sequences used for construction of antenna arrays have restrictions in size and this is a problem for building antenna arrays with custom size. In the paper the approach of sparse antenna arrays synthesis with custom size based is proposed. Proposed approach is based on combining of smaller optimal or quasi-optimal sequences to get custom sized sparse antenna arrays with quasi-optimal spatial characteristics.

2018 14th International Conference on Advanced Trends in Radioelecrtronics, Telecommunications and Computer Engineering (TCSET), 2018

Untuk mendukung pencapaian produksi pangan nasional, Pemerintah melalui Kementerian Pekerjaan Umu... more Untuk mendukung pencapaian produksi pangan nasional, Pemerintah melalui Kementerian Pekerjaan Umum dan Perumahan Rakyat menyediakan anggaran yang cukup besar untuk keperluan pembangunan dan rehabilitasi infrastruktur jaringan irigasi. Pembangunan dan rehabilitasi infrastruktur jaringan irigasi diharapkan memiliki kinerja yang baik sesuai dengan sasaran dan tujuan yang ingin dicapai. Sebagai pendukung evaluasi dari kinerja proyek-proyek tersebut diperlukan sebuah sistem pengukuran kinerja yang memiliki indikator-indikator yang lebih baik terintegrasi dan mengakomodir kepuasan dan kontribusi semua pihak yang terlibat di dalamnya. Pada penelitian ini digunakan metode performance prism (prisma kinerja) yaitu suatu metode yang terintegrasi dan mengakomodasi keinginan dan kontribusi pihak-pihak yang terlibat pada proyek infrastruktur jaringan irigasi yaitu Kementerian PUPR sebagai Pengguna Jasa, Kontraktor, Konsultan Perencana, Konsultan Pengawas, Auditor, Petani dan Pemerintah Daerah ke dalam bentuk objective (tujuan bersama). Perumusan objective dilakukan dengan pengolahan data yang diperoleh dengan cara wawancara dan diskusi dengan pihak-pihak yang terlibat dalam pelaksanaan proyek. Kemudian dilakukan analisa strategi, proses dan kapabilitas dari pihak pengelola proyek (pengguna jasa, kontraktor dan konsultan) sebagai pelaksana teknis dan pelaksana anggaran proyek-proyek tersebut sehingga didapatkan indikator-indikator kinerja proyek. Pada penelitian ini dihasilkan 15 bentuk objective yang fokus pada penggunaan anggaran, perencanaan proyek, proses pengadaan barang dan jasa (pelelangan), pelaksanaan konstruksi, kualitas dan kuantitas pekerjaan, kemampuan pengelolaan sumber daya, hasil konstruksi, keselamatan dan kesejahteraan, hubungan dan pelayanan, penanganan masalah, pengawasan proyek, laporan dan administrasi proyek, pemeliharaan konstruksi, proses pembayaran pekerjaan, dan manfaat proyek. Dari 15 objective tersebut dihasilkan indikator kinerja proyek yang dikelompokkan berdasarkan waktu pengukuran indikator, yaitu indikator tahap perencanaan dan pelelangan proyek, indikator tahap pelaksanaan proyek, dan indikator tahap pemeliharaan proyek. Kata Kunci : jaringan irigasi, kinerja, performance prism, indikator kinerja proyek.

Generalized radar/radiometry imaging problems PRUDYUS, I., et al. In the paper the results of spa... more Generalized radar/radiometry imaging problems PRUDYUS, I., et al. In the paper the results of spatio-temporal imaging simulation based on radar, synthetic aperture radar (SAR)and radiometry systems are presented. The analytical relationship between object scattering/emitting and the formed image is given and the general approach for the description of imaging system by means of Frendholm equation solution is developed. The potential limit of image resolution based on Rao-Cramer inequality is estimated. PRUDYUS, I., et al. Generalized radar/radiometry imaging problems. Journal of

2019 IEEE 15th International Conference on the Experience of Designing and Application of CAD Systems (CADSM), 2019

The method of increasing the object detection probability by system of multispectral monitoring i... more The method of increasing the object detection probability by system of multispectral monitoring is developed. The functioning of the multispectral monitoring system with proposed method of movable images fusion is investigated. Fusion of information from visible and infrared channels of the monitoring system by the developed method of data fusion and detection of moving objects on the fused video signal by developed algorithm of motion detection were carried out. The results of experiments confirm that the probability of detection increases, recognition and identification of moving objects by the multispectral monitoring system are achieved due to improved informativeness of formed image with the developed method.

2010 International Conference on Modern Problems of Radio Engineering, Telecommunications and Computer Science (TCSET), 2010

In present paper there was done analysis of possible ways to improve quality of satellite images,... more In present paper there was done analysis of possible ways to improve quality of satellite images, which are being used for multilevel data processing, in order to increase object detection accuracy.