Research

Publications

729 publications

2012
Radio-Telescope RT-16 control system

Gaigals G., Lībiete I., Bezrukovs D., Jēkabsons N.

Abstract

Gaigals G., Lībiete I., Bezrukovs D., Jēkabsons N. Radio-Telescope RT-16 control system. Journal of International Scientific Publications: Materials, Methods & Technologies, Volume 6. 2012.
2012
Adaptive management algorithms for fixed size jitter buffer

Abstract

M. Broitman, N. Silinskis and K. Solovjovs. Adaptive management algorithms for fixed size jitter buffer, “Automatic Control and Computer Sciences”, Vol.46, Issue 1, 2012, pp.19-27.
2012
Local binary patterns and neural network based technique for robust face detection and localization

O. Nikisins, M. Greitans

Abstract

O. Nikisins, M. Greitans. Local binary patterns and neural network based technique for robust face detection and localization. Proceedings of the Special Interest Group on Biometrics and Electronic Signatures (BIOSIG 2012), Status: accepted, September 2012.
2012
Grid shaped accelerometer network for surface shape recognition

Atis Hermanis, Krišjānis Nesenbergs

Abstract

Atis Hermanis, Krisjanis Nesenbergs, "Grid shaped accelerometer network for surface shape recognition", Electronics Conference (BEC), 2012 13th Biennial Baltic, pp.203-206, 2012. DOI: <a href="http://10.1109/BEC.2012.6376852">10.1109/BEC.2012.6376852</a> All authors: Atis Hermanis, Krisjanis Nesenbergs. Abstract: In this paper a novel shape detection system is proposed consisting of accelerometer network laid out in regular grid formation. This system is specifically designed as a foundation for shape recognizing fabrics usable in medicine. Specifically, enabling production of clothing capable of posture recognition and biofeedback, for treatment of scoliosis and similar diseases. The result is a functioning 16 three-axis accelerometer prototype device and method of approximately reconstructing its shape in three dimensions with tested average error less than 1cm for surface of dimensions up to 24 × 24cm.
2012
Non-Stationary Signal Reconstruction from Level-Crossing Samples using Akima Spline

U. Grunde

Abstract

U. Grunde. “Non-Stationary Signal Reconstruction from Level-Crossing Samples using Akima Spline” Electronics and Electrical Engineering, Kaunas: Signal Technology. 2012. No.1 (117), pp. 9-12. Abstract The modification of the level crossing sampling algorithm is proposed in order to decrease the volume of sampled data. The reconstruction of the signal based on sampled data is discussed. The performance of the signal reconstruction based on different interpolation splines is evaluated. The evaluation of the signal recovery is based on metrics including the cross correlation coefficient, the root mean square error and the percentage root mean square difference. It is demonstrated that compression coefficient’s value 10 is achievable for the cross correlation coefficient 0.92. Ill. 7, bibl. 5 (in English; abstracts in English and Lithuanian). <a href="http://www.google.lv/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCEQFjAA&url=http%3A%2F%2Fwww.ee.ktu.lt%2Fjournal%2F2012%2F01%2F02__ISSN_1392-1215_Non%2520Stationary%2520Signal%2520Reconstruction%2520from%2520Level%2520Crossing%2520Samples%2520using%2520Akima%2520Spline.pdf&ei=hcdqUKDwHePe4QSRkIGYCg&usg=AFQjCNHGturthD4ltDN1nhAyuWhzNUl47w&sig2=u3qyJg4klEJQJD9JgU0T5g&cad=rja" target="_blank" rel="noopener noreferrer">pdf</a>
2012
Применение преобразования Карунена-Лоэва в биорадиолокации: Моделирование дыхания

М. Грейтанс, В. Аристов и Т. Лайминя

Abstract

М. Грейтанс, В. Аристов и Т. Лайминя „Применение преобразования Карунена-Лоэва в биорадиолокации: Моделирование дыхания”, АВТОМАТИКА И ВЫЧИСЛИТЕЛЬНАЯ ТЕХНИКА. Выпуск No.1, 2012 (Vol. 46)c.28-36. Greitans, M., Aristov, V., Laimina, T., “Application of the Karhunen-Loeve transformation in bio-radiolocation: Breath simulation” Automatic Control and Computer Sciences. Vol.46, Number 1, 2012. pp.18-24. Abstract An application of the Karhunen-Loeve transformation (principal component analysis) to the extraction of the signal corresponding to small breathing displacements of the human chest is illustrated by the example of the ultrabandwidth impulse reflected from a simple human target. The reduction in the dimensions of the original signals from 256 to 5 is shown by experiments to take place in the case of small displacements and the mean-square error not exceeding 10%. <a href="http://link.springer.com/article/10.3103%2FS014641161201004X" target="_blank" rel="noopener noreferrer">pdf</a>
2012
The “Up_and_Down” Method with a Variable Step in Digital Sampling Conversion

V. Karklinsh

Abstract

V. Karklinsh “The “Up_and_Down” Method with a Variable Step in Digital Sampling Conversion”, ISSN 0146_4116, Automatic Control and Computer Sciences, 2012, Vol. 46, No. 1, pp. 34–40. © Allerton Press, Inc., 2012. Abstract The author proposes a method for reducing the errors of conversion and/or the number of strobings with using a variable step in the “up-and-down” method. <a href="http://www.springerlink.com/content/w5226g3703054265/" target="_blank" rel="noopener noreferrer">pdf</a>
2012
Application of the Karhunen–Loeve Transformation in Bio_Radiolocation: Breath Simulation

M. Greitans, V. Aristov, and T. Laimina

Abstract

M. Greitans, V. Aristov, and T. Laimina “Application of the Karhunen–Loeve Transformation in Bio_Radiolocation: Breath Simulation”. ISSN 0146_4116, Automatic Control and Computer Sciences, 2012, Vol. 46, No. 1, pp. 18–24. © Allerton Press, Inc., 2012. Abstract An application of the Karhunen-Loeve transformation (principal component analysis) to the extraction of the signal corresponding to small breathing displacements of the human chest is illustrated by the example of the ultrabandwidth impulse reflected from a simple human target. The reduction in the dimensions of the original signals from 256 to 5 is shown by experiments to take place in the case of small displacements and the mean-square error not exceeding 10% <a href="http://www.springerlink.com/content/l7178431599t3073/" target="_blank" rel="noopener noreferrer">pdf</a>
2012
Communication channels dynamics test using time domain deconvolution algorithm

Gatis Šūpols, Ēvalds Hermanis

Abstract

G.Supols, E.Hermanis. Communication channels dynamics test using time domain deconvolution algorithm. 2012 International Conference on Signals and Electronic Systems, ICSES 2012 - The Conference Proceedings2012, Article number 6382234. DOI: <a href="http://10.1109/ICSES.2012.6382234">10.1109/ICSES.2012.6382234</a> All authors: Gatis Supols, Evalds Hermanis. Abstract: This paper presents a time domain deconvolution algorithm. The operational principle and practical results from testing the algorithm on coaxial cable line and wireless communication channel is described. The simplicity of the algorithms usage is demonstrated and is based on the easy understanding of how to choose the algorithms parameters for applying it to time-base measurements data.
2012
Reduced complexity automatic face recognition algorithm based on local binary patterns

O. Nikisins, M. Greitans

Abstract

O. Nikisins, M. Greitans. Reduced complexity automatic face recognition algorithm based on local binary patterns. Peoceedings of 19th International Conference on Systems, Signals and Image Processing (IWSSIP 2012), pages 447-450, April 2012.
2012
Conservation of the Law of Phase Modulation for UWB Pulse Signals in the First Principal Component

M. Greitans and V. Aristov

Abstract

M. Greitans and V. Aristov, “Conservation of the Law of Phase Modulation for UWB Pulse Signals in the First Principal Component”, “Automatic Control and Computer Sciences” Vol.46, Number 4, 2012 , Allerton Press, Inc. pp.179-184. М.Грейтанс и В. Аристов, „Сохранение закона фазовой модуляции UWB импульсного сигнала в первой главной компоненте”, ”Автоматика и вычислительная техника” - АВТ, Выпуск No.4, 2012, с.47-54.
2012
Developvement of mobile research robot

Baums A., Gordjusins A., Kanonirs G.

Abstract

Baums A., Gordjusins A., Kanonirs G., „Developvement of mobile research robot”, ICINCO 2012, 9th International Conference on Informatics in Control, Automation and Robotics., 28-31 July, 2012, Rome, Italy. (Electronic Proceedings), pp. 329-332.
2012
Signal Sampling According to Time-Varying Bandwidth

R. Shavelis, M. Greitans

Abstract

R. Shavelis, M. Greitans „Signal Sampling According to Time-Varying Bandwidth”, Proc. of the 20th European Signal Processing Conference EUSIPCO 2012, Bucharest, Romania, Aug., 2012., pp. 1164-1168. Abstract The paper addresses the problem of signal-dependent sam-pling of analogue signals according to local bandwidth. An extended sampling theorem is given which states that sig-nals can be sampled non-uniformly and then perfectly recon-structed if spectrum obtained by an extended Fourier trans-form (EFT) is bandlimited. Since, according to the theorem, the sampling instants are determined by the function used in EFT, the aim is to find such function which reflects the time-varying spectral content of the signal. This, in comparison to uniform sampling, allows reducing the number of samples required to represent the signal. The results have been demon-strated by numerical simulations on two signals. <a href="http://www.google.lv/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0CCEQFjAA&url=http%3A%2F%2Fwww.eurasip.org%2FProceedings%2FEusipco%2FEusipco2012%2FConference%2Fpapers%2F1569574175.pdf&ei=crlqULnTB9L24QT1y4CwDQ&usg=AFQjCNHFqJxK44UpkYYLpdbrJ2n_u-xG2A&sig2=2rkA2F5ljptoZiz4hJlPXQ&cad=rja" target="_blank" rel="noopener noreferrer">pdf</a>
2012
EEG Data Acquisition System Based on Asynchronous Sigma-Delta Modulator

K.Ozols, M.Greitans, R.Shavelis

Abstract

K.Ozols, M.Greitans, R.Shavelis. "EEG Data Acquisition System Based on Asynchronous Sigma-Delta Modulator", The 13th Biennial Baltic Electronics Conference BEC2012, Tallinn, Estonia, Oct. 3-5, 2012. Abstract: This paper describes a multichannel mobile EEG data acquisition system that consists of on-head sensors with built in electroencephalogram (EEG) signal amplifier, asynchronous sigma-delta modulator (ASDM) for analog to digital conversion and 434MHz On-Off keying (OOK )wire-less data transmitter. A prototype circuit has been designed and fabricated in a 11x16mm cylinder package. After receiv-ing the signal, appropriate processing is applied in order to reconstruct the brain wave signals <a href="http://edi.lv/lv/publikacijas/2012/320/ieeexplore.ieee.org/xpl/articleDetails.jsp?arnumber=6376847" target="_blank" rel="noopener noreferrer">pdf (IEEE)</a>
2012
Design and evaluation of a stroboscopic signal converter based on discrete transistor clocked comparator

N. Agafonovs and G. Supols

Abstract

N. Agafonovs and G. Supols. “Design and evaluation of a stroboscopic signal converter based on discrete transistor clocked comparator”. 2012 13th Biennial Baltic Electronics Conference (BEC2012) October 3-5, 2012,Tallinn, Estonia. pp. 69-73. <a href="http://www.elin.ttu.ee/bec/12/?leht=vorm18-Programme.html" target="_blank" rel="noopener noreferrer">pdf</a>
2012
Adaptive Vehicle Mode Monitoring Using Embedded Devices with Accelerometers

Artis Mednis, Georgijs Kanonirs, and Leo Selavo

Abstract

Artis Mednis, Georgijs Kanonirs, and Leo Selavo. Adaptive Vehicle Mode Monitoring Using Embedded Devices with Accelerometers. J.B. Pérez et al. (Eds.): Highlights on PAAMS, AISC 156, pp. 231–238, 2012. Springer-Verlag Berlin Heidelberg 2012. Abstract Monitoring of specific attributes such as vehicle speed and fuel consumption as well as cargo safety is an important problem for transport domain. This task is performed using specific multiagent monitoring systems. To ensure secure operation of such systems they should have autonomous and adaptive behaviour. The paper is describing an adaptive agent for vehicle mode monitoring using embedded devices with accelerometers. Data processing algorithm and adaptive functionality are discussed and their evaluation is presented with vehicle standing mode detection as high as true positive rate of 97% using real world data. Optimization of parameters for data processing algorithm is performed as well as suggestions for their application described. <a href="http://www.springerlink.com/content/427w58710r34v7u5/" target="_blank" rel="noopener noreferrer">pdf</a>
2012
ОБРАБОТКА ЗАШУМЛЕННОГО СВЕРХШИРОКОПОЛОСНОГО ИМПУЛЬСНОГО СИГНАЛА МЕТОДОМ ГЛАВНЫХ КОМПОНЕНТ

Грейтанс Модрис, Херманис Эвалдс, Аристов Владимир

Abstract

Грейтанс Модрис, Херманис Эвалдс, Аристов Владимир, “ОБРАБОТКА ЗАШУМЛЕННОГО СВЕРХШИРОКОПОЛОСНОГО ИМПУЛЬСНОГО СИГНАЛА МЕТОДОМ ГЛАВНЫХ КОМПОНЕНТ”. Альманах современной науки и образования. Тамбов: Грамота, 2012. № 8. (63) , c. 30-35. ISSN 1993-5552 <a href="http://www.gramota.net/materials/1/2012/8/" target="_blank" rel="noopener noreferrer">pdf</a> <div id="gtx-trans" style="position: absolute; left: -14px; top: 0px;"> <div class="gtx-trans-icon"></div> </div>
2012
Accurate Sensor Node Energy Consumption Estimation Using EdiMote Prototyping Platform

R.Ruskuls, G.Strazdins, and L.Selavo

Abstract

R.Ruskuls, G.Strazdins, and L.Selavo, "Accurate Sensor Node Energy Consumption Estimation Using EdiMote Prototyping Platform", in The 3rd International Workshop on Networks of Cooperating Objects (CONET’12), Electronic Proceedings, 2012. Abstract Wireless sensor networks and other battery powered embedded systems often require long lifetime. To assess application efficiency, accurate energy estimation tools are required. Although software energy profiling provides scalable network simulation opportunities, it lacks ac-curacy. In this paper we propose a hardware-based energy measurement approach using EdiMote prototyping platform. Evaluation shows, that it is more accurate compared to software profiling while providing extra information about energy consumption of separate system modules: MCU and radio chip. <a href="http://conet2012.cister-isep.info/CONET2012.pdf" target="_blank" rel="noopener noreferrer">pdf</a>
2011
Precise Measurement of Event Flow Time Coordinates

A.Rybakov, V.Vedin

Abstract

A.Rybakov, V.Vedin. Precise Measurement of Event Flow Time Coordinates Based on the Digital Processing of a Triggered Relaxation Oscillator Wave Train, Automatic Control and Computer Sciences, 2011, Vol. 45, No. 3, pp. 162–173.
2011
Improvement of the Accuracy of the Temporal Position Estimation of the Gravity Center of an Analog Signal

A.S.Rybakov

Abstract

A.S.Rybakov. Improvement of the Accuracy of the Temporal Position Estimation of the Gravity Center of an Analog Signal on the Basis of Discrete samples, Automatic Control and Computer Sciences, 2011, Vol. 45, No. 6, pp. 301–313.

Radio-Telescope RT-16 control system

Adaptive management algorithms for fixed size jitter buffer

Local binary patterns and neural network based technique for robust face detection and localization

Grid shaped accelerometer network for surface shape recognition

Non-Stationary Signal Reconstruction from Level-Crossing Samples using Akima Spline

Применение преобразования Карунена-Лоэва в биорадиолокации: Моделирование дыхания

The “Up_and_Down” Method with a Variable Step in Digital Sampling Conversion

Application of the Karhunen–Loeve Transformation in Bio_Radiolocation: Breath Simulation

Communication channels dynamics test using time domain deconvolution algorithm

Reduced complexity automatic face recognition algorithm based on local binary patterns

Conservation of the Law of Phase Modulation for UWB Pulse Signals in the First Principal Component

Developvement of mobile research robot

Signal Sampling According to Time-Varying Bandwidth

EEG Data Acquisition System Based on Asynchronous Sigma-Delta Modulator

Design and evaluation of a stroboscopic signal converter based on discrete transistor clocked comparator

Adaptive Vehicle Mode Monitoring Using Embedded Devices with Accelerometers

ОБРАБОТКА ЗАШУМЛЕННОГО СВЕРХШИРОКОПОЛОСНОГО ИМПУЛЬСНОГО СИГНАЛА МЕТОДОМ ГЛАВНЫХ КОМПОНЕНТ

Accurate Sensor Node Energy Consumption Estimation Using EdiMote Prototyping Platform

Precise Measurement of Event Flow Time Coordinates

Improvement of the Accuracy of the Temporal Position Estimation of the Gravity Center of an Analog Signal