Publications

729 publications

• 2012

  Experimental Evaluation of Conditions for Short-Distance Transmission of Event Timing Data

  I.Bilinskis, A.Skageris, K.Sudars

  Abstract

  <p>I.Bilinskis, A.Skageris, K.Sudars, “Experimental Evaluation of Conditions for Short-Distance Transmission of Event Timing Data”, International conference “Electronics 2012”, Palanga, Lithuania, 18-20 June 2012.</p> <p><a href="http://www.ee.ktu.lt/electronics/files/E2012_program.pdf" target="_blank" rel="noopener noreferrer">pdf</a></p>
• 2012

  Method for Wideband Signal Digitizing and their Real-time Reconstruction in Enlarged Dynamic Range

  I.Bilinskis, K. Sudars, M. Min

  Abstract

  <p>I.Bilinskis, K. Sudars, M. Min, “Method for Wideband Signal Digitizing and their Real-time Reconstruction in Enlarged Dynamic Range”, International conference “Electronics 2012”, Palanga, Lithuania, 18-20 June 2012.</p> <p><a href="http://www.ee.ktu.lt/electronics/files/E2012_program.pdf" target="_blank" rel="noopener noreferrer">pdf</a></p>
• 2012

  Accessible, Customizable, High-Performance IEEE 802.11p Vehicular Communication Solution

  N. Agafonovs, G. Strazdins, M.Greitans

  Abstract

  <p>N. Agafonovs, G. Strazdins, M.Greitans, "Accessible, Customizable, High-Performance IEEE 802.11p Vehicular Communication Solution," in Proc. of International Workshop on Vehicular Communications and Applications (VCA 2012), Aiya Napa, Cyprus, pp. 127-132, June 19, 2012.<br /> Abstract</p> <p>Intelligent driving is a promising area for increased<br /> safety and comfort. Vehicular communication is an essential part<br /> of building such intelligent systems. To provide inter-operability<br /> of wide vehicle range, common standards are needed. One of<br /> recently established standards for vehicular networks is IEEE<br /> 802.11p. However, 802.11p hardware platform market is limited<br /> due to protocol immaturity. Existing solutions are complex,<br /> expensive and closed-source systems with limited applicability.<br /> In this paper we propose an open, accessible and customizable<br /> wireless system for vehicular communication supporting IEEE<br /> 802.11p protocol. The system consists of low-cost components<br /> and open source software suitable for experimental intelligent<br /> transportation system research and applications. Nevertheless,<br /> real world tests prove feasibility of the system.</p> <p><a href="http://strazdins.lv/papers/agafonovs2012router.pdf" target="_blank" rel="noopener noreferrer">pdf</a> (G. Strazdins personal page)</p>
• 2012

  Адаптивный k-up-and-down метод при компараторном стробоскопическом преобразовании сигналов UWB радиолокации

  К. Круминьш и В. Плоциньш

  Abstract

  <p>К. Круминьш и В. Плоциньш, "Адаптивный k-up-and-down метод при компараторном стробоскопическом преобразовании сигналов UWB радиолокации", "Автоматика и вычислительная техника", Рига, 2012, No.6, c.58-68.</p> <div id="gtx-trans" style="position: absolute; left: -25px; top: 0px;"> <div class="gtx-trans-icon"></div> </div>
• 2012

  A mini-batch discriminative feature weighting algorithm for lbp - based face recognition

  O. Nikisins, M. Greitans

  Abstract

  <p>O. Nikisins, M. Greitans. A mini-batch discriminative feature weighting algorithm for lbp - based face recognition. Peoceedings of IEEE International Conference on Imaging Systems and Techniques (IST<br /> 2012), pages 170-175, July 2012.</p>
• 2012

  Compression Functions Used in the Algorithms for the Estimation of Signal Arrival Time under High-Precision Event Timing

  A. Ribakov

  Abstract

  <p>A. Ribakov „Compression Functions Used in the Algorithms for the Estimation of Signal Arrival Time under High-Precision Event Timing” “Automatic Control and Computer Sciences” Vol.46, Number 6, 2012 , Allerton Press, Inc. pp. 288-298. A.Рыбаков. „Использование сжимающих функций в алгоритмах оценивания времени прихода сигналов при прецизионном таймировании событий”. - ”Автоматика и вычислительная техника” - АВТ, Выпуск No.6, 2012, с.69-82.<br /> Abstract</p> <p>The possibilities are studied for improving the accuracy of the interpolation method for measuring the event occurrence time based on the digital processing of signals associated with the events. The problem of estimating the time of the analog signal arrival is formulated and solved as a problem of finding a fixed point of some contraction mapping. The compression function is constructed on the basis of spectral coefficients of a trigonometric series that approximates the shape of the analog signal. The accuracy potential of the interpolation measurement technique is illustrated by the results of computer simulation.</p> <p><a href="http://link.springer.com/content/pdf/10.3103%2FS0146411612060077.pdf" target="_blank" rel="noopener noreferrer">pdf</a></p>
• 2012

  Извлечение информации из СШП импульсного сигнала с использованием преобразования Карунена-Лоэва

  Грейтанс М., Аристов В

  Abstract

  <p>Грейтанс М., Аристов В „Извлечение информации из СШП импульсного сигнала с использованием преобразования Карунена-Лоэва” , Вісник Національного університету „Львівська політехніка”, Радіоелектроніка та телекомунікації, № 738 (2012), c 38-42.<br /> <a href="http://vlp.com.ua/node/9823" target="_blank" rel="noopener noreferrer">pdf</a></p> <p>&nbsp;</p>
• 2012

  A Method for Correction of Rural Multispectral Aerial Image Mosaics

  I.Mednieks

  Abstract

  <p>I.Mednieks. "A Method for Correction of Rural Multispectral Aerial Image Mosaics." Proceedings of the 13th Biennial Baltic Electronics Conference, Tallinn, pp.295-298, 2012.</p>
• 2012

  Measurement signal digitizing based on timing operation providing for complexity-reduced digital filtering

  Yu. Artyukh, I. Bilinskis, K. Sudars

  Abstract

  <p>Yu. Artyukh, I. Bilinskis, K. Sudars. “Measurement signal digitizing based on timing operation providing for complexity-reduced digital filtering”, Metrology and Measurement Systems.</p>
• 2012

  Signal-dependent analog-to-digital converter based on MINIMAX sampling

  I.Homjakovs, M.Hashimoto, T.Hirose and T.Onoye

  Abstract

  <p>I.Homjakovs, M.Hashimoto, T.Hirose and T.Onoye, „Signal-dependent analog-to-digital converter based on MINIMAX sampling”, In Proc. of 9th International SoC Design Conference (ISOCC 2012), E-ISBN 978-1-4673-2988-0, pp.120-123, Nov. 2012.<br /> Abstract</p> <p>This paper presents a physical implementation of a signal-dependent analog-to-digital converter (ADC), called MINIMAX ADC. This ADC captures a sample every time an analog signal reaches its local maximum or minimum value. In this ADC, sampling naturally adapts to input signal frequency, which enables high data compression rate and power reduction to be achieved. A 8-bit MINIMAX ADC was implemented in 180nm CMOS technology. Measurement results show that the proposed MINIMAX ADC consumes lower power for less active signals, and the power reduction from conventional synchronous ADC is up to 20%.</p> <p><a href="http://ieeexplore.ieee.org/xpl/login.jsp?tp=&amp;arnumber=6407054&amp;url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6407054" target="_blank" rel="noopener noreferrer">pdf</a></p>
• 2012

  Reliability enhancement of event timer calibration by using a dual PLL for the calibrating signal generation

  V. Vedins, A. Mezeriņš

  Abstract

  <p>V. Vedins, A. Mezeriņš. “Reliability enhancement of event timer calibration by using a dual PLL for the calibrating signal generation”. Proc. 13th Biennial Baltic Electronics Conference (BEC2012), October 3-5, 2012, Tallin, Estonia, pp.113-114.<br /> Abstract</p> <p>An approach to calibration of the DSP-based very high precision event timer is considered. A specific calibration signal is synthesized from the master clock signal by employing a dual PLL circuit. Experimental results obtained by testing a particular event timer confirm high reliability of such solution.</p> <p><a href="http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&amp;arnumber=6376828&amp;contentType=Conference+Publications" target="_blank" rel="noopener noreferrer">pdf</a></p>
• 2012

  High-precise determination of correction function for reducing integral non-linearity of DSP-based event timer

  Yu. Artyukh, E. Boole, J.Bule

  Abstract

  <p>Yu. Artyukh, E. Boole, J.Bule. “High-precise determination of correction function for reducing integral non-linearity of DSP-based event timer.” Proc. 13th Biennial Baltic Electronics Conference (BEC2012), October 3-5, 2012, Tallin, Estonia, pp.303-306.<br /> Abstract</p> <p>Effective non-linearity correction is one of the most important problem for development of high-performance event timers based on Digital Signal Processing (DSP) methods. Suggested approach to resolving this problem is based on determination of a correction function using constant period test pulse sequences with seemingly random modular values. It is shown that such an approach allows achieving non-linearity correction with picosecond precision at test pulse sequence lengths quite acceptable for practical applications. Precision of DSP-based event timers can be improved in this way up to a few picoseconds.</p> <p><a href="http://ieeexplore.ieee.org/xpl/login.jsp?tp=&amp;arnumber=6376877&amp;url=http%3A%2F%2Fieeexplore.ieee.org%2Fxpls%2Fabs_all.jsp%3Farnumber%3D6376877" target="_blank" rel="noopener noreferrer">pdf</a></p>
• 2012

  Experimental Evaluation of Conditions for Short-Distance Transmission of Event Timing Data

  I.Bilinskis, A.Skageris, K.Sudars

  Abstract

  <p>I.Bilinskis, A.Skageris, K.Sudars, “Experimental Evaluation of Conditions for Short-Distance Transmission of Event Timing Data”, International conference “Electronics 2012”, Palanga, Lithuania, 18-20 June 2012.<br /> Abstract</p> <p>Specifics of event timing data transmission are experimentally investigated under conditions typical for multi-channel data acquisition from a large quantity of signal sources. The events, in the considered case, are analog input signal and sinusoidal reference function crossings. The sequences of the crossing time instants represent the respective analog input signals and these sequences have to be transmitted to the signal reconstruction subsystem. An experimental system for fast short-distance transmission has been built. It performs data encoding on the basis of digital pulse position modulation with 10 picoseconds resolution. The achievable data encoding resolution and other vital parameters characterizing data transmission systems of this type were evaluated on this basis.</p> <p><a href="http://www.eejournal.ktu.lt/index.php/elt/article/view/4055" target="_blank" rel="noopener noreferrer">pdf</a></p>
• 2012

  Using Consolidated Covariance Image for Discrimination of Habitats

  R. Dinuls, A. Lorencs, I. Mednieks

  Abstract

  <p>R. Dinuls, A. Lorencs, I. Mednieks. "Using Consolidated Covariance Image for Discrimination of Habitats," Proceedings of the 13th Biennial Baltic Electronics Conference, Tallinn, Estonia, pp.299-302, 2012.</p>
• 2012

  SADmote: A Robust and Cost-Effective Device for Environmental Monitoring

  Atis Elsts, Rihards Balass, Janis Judvaitis, Reinholds Zviedris, Girts Strazdins, Artis Mednis, and Leo Selavo

  Abstract

  <p>Atis Elsts, Rihards Balass, Janis Judvaitis, Reinholds Zviedris, Girts Strazdins, Artis Mednis, and Leo Selavo. SADmote: A Robust and Cost-Effective Device for Environmental Monitoring. A. Herkersdorf et al. (Eds.): ARCS 2012, LNCS 7179, pp. 225–237, 2012. Springer-Verlag Berlin Heidelberg 2012.<br /> Abstract</p> <p>Time to deployment for wireless sensor networks could be reduced by using commercial sensor nodes. However, this may lead to suboptimal flexibility, power consumption and cost of the system. Our pilot deployment for precision agriculture and fruit growing research showed similar conclusions and outlined the design decisions leading to SADmote: a new sensor node for environmental monitoring. It was evaluated both in the lab and field, showing improved energy consumption over commercial solutions such as Tmote Sky and Waspmote.</p> <p><a href="http://www.springerlink.com/content/d4322r4528177727" target="_blank" rel="noopener noreferrer">pdf</a> Springer</p> <p><a href="http://strazdins.lv/papers/elsts2012sadmote.pdf" target="_blank" rel="noopener noreferrer">pdf</a> (G. Strazdins personal page)</p>
• 2012

  Embedded Solution for Road Condition Monitoring Using Vehicular Sensor Networks

  Artis Mednis, Atis Elsts, and Leo Selavo

  Abstract

  <p>Artis Mednis, Atis Elsts, and Leo Selavo. Embedded Solution for Road Condition Monitoring Using Vehicular Sensor Networks. The 6th International Conference on Application of Information and Communication Technologies (AICT 2012), Proceedings of the 6th International Conference on Application of Information and Communication Technologies (AICT 2012), pp. 248-252, 2012. IEEE eXpress Conference Publishing, 2012.<br /> Abstract</p> <p>The advantages of vehicular sensor networks over common wireless sensor networks include the possibility to cover wide measurement area using relatively small number of sensor nodes as well as not so strong limitations according device dimensions, weight and power consumption. These attractive features are reason for expansion of vehicular sensor networks for various environmental monitoring tasks - from defects of road surface to air quality in urban areas. The contribution of this paper is a customized embedded device dedicated for monitoring of road surface using microphone and accelerometer sensors as well as collection of meteorogical data for creation of detailed road meteorology maps. Selected hardware and software aspects are discussed and the implementation of previously developed method for road surface monitoring using accelerometer data is presented.</p> <p><a href="http://www.google.com/url?q=http%3A%2F%2Faict.info%2F2012%2Finfo%2FAICT2012-Conference-Program.pdf&amp;sa=D&amp;sntz=1&amp;usg=AFrqEze7PvumOIWwo8CT2eIIoatYcJ9sbg" target="_blank" rel="noopener noreferrer">pdf</a></p> <p><a href="http://ieeexplore.ieee.org/xpl/articleDetails.jsp?reload=true&amp;tp=&amp;arnumber=6398502" target="_blank" rel="noopener noreferrer">pdf IEEE</a></p>
• 2012

  Retrieval information from the UWB pulse signal using the Karhunen Loeve transform

  Vladimir Aristov, Modris Greitans

  Abstract

  <p><strong>Abstract:</strong></p> <div>In the article the results of the Karhunen-Loeve transform in the processing model of UWB pulse signals to retrieval information about the amplitude and phase changes.</div>
• 2012

  SAD: Wireless Sensor Network System for Microclimate Monitoring in Precision Agriculture

  A. Elsts, R. Balass, J. Judvaitis and L. Selavo

  Abstract

  <p><span lang="EN-GB">A. Elsts, R. Balass, <u>J. Judvaitis</u> and L. Selavo, “<em>SAD: Wireless Sensor Network System for Microclimate Monitoring in Precision Agriculture</em>,” in Proceedings of the 5-th international scientific conference Applied information and communication technologies (AICT 2012), Jelgava, Latvia, April 26-27, ISBN 978-9984-48-065-7, pp. 271-281, 2012</span></p>
• 2012

  Poster Abstract: SEAL: An Easy-to-use Sensor Node Application Development System

  A. Elsts, J. Judvaitis and L. Selavo

  Abstract

  <p><span lang="EN-GB">A. Elsts, <u>J. Judvaitis</u> and L. Selavo, “<em>Poster Abstract: SEAL: An Easy-to-use Sensor Node Application Development System”</em>, 9th European Conference on Wireless Sensor Networks (EWSN 2012), Poster and Demo Proceedings, pp. 31–32, Trento, Italy, 2012.</span></p>
• 2012

  Receiving system for ionospheric research

  J. Trokss, A. Lesins, G. Gaigals, M. Nechaeva, Vl. Bezrukovs.

  Abstract

  <p><span class="m_-8665640760123692966459473308-23082019"><span lang="EN-GB">J. Trokss, A. Lesins, G. Gaigals, M. Nechaeva, Vl. Bezrukovs. Receiving system for ionospheric research. Latvian Journal of Physics and Technical Sciences, december 2012., N6 (Scopus, Tompson Reuter Web of Science, EBSCO).</span></span></p>