INSTITUTE OF INFORMATION TECHNOLOGIES - BAS

Department: "Signal Processing"

Main Research Directions:

Radar and navigation multi-signal processing
Computational architectures for signal processing

The signal processing department develops new methods, algorithms, programs and computational architectures for signal processing in intensive pulse jamming presence having various origin, which is being used in radars, radio-navigation, mobile and fixed communications.
The surveyed algorithms are studied in general-purpose Personal Computers though numerical analysis or mathematical modeling by Monte Carlo statistical analysis.
The research encompasses following scientific areas:
The department consists of six researchers: one professor – Doctor of Science, three Associate Professors and one Research Associate. Three of them have been awarded a PhD degree in the last five years.
The scientific results are published in honored international and national journals and conferences. The total publication number of the department in the last five years are totally 81; chapters in scientific books published abroad 2; international journals 10; international conferences 39; national journals 23; national conferences 7.
The research staff has intensive contribution in project preparation and project management. More than 12 IIT projects to the value of 40 thousand BGL are developed in the last five years. The project participation includes Bulgarian Ministry of Education and Science, Bulgarian Ministry of Defense; Institute of Information Technologies (IIT); MPS Ltd.

RESEARCH SCIENTIFIC AND APPLIED ACTIVITY
Research Scientific Projects

Applied Projects

TEACHING ACTIVITY

LIST OF PUBLICATIONS
  1. Kabakchiev Chr., V. Behar, B. Vassileva, D. Angelova, K. Aleksiev, V. Kyovtorov, I. Garvanov, L. Doukovska, Pl. Daskalov, “UXO Signal Multi Sensor Detection and Estimation, Proceedings of the NATO Advanced Study Institute on Unexploded Ordnance Detection and Mitigation”, Springer, Book Series “NATO Science for Peace and Security Series”, Subseries “NATO Science for Peace and Security”, Series B: Physics and Biophysics, James Byrnes (Ed.), Approx. 330 p., Hardcover, (ISBN: 978-1-4020-9251-0), pp. 141-164, 2008.
  2. Shishkov B., A. Bekiarski, Hr. Kabakchiev, “Spatial and Temporal Processing of Cyclostationary Signals in Array Antennas Based on Cyclic Higher-Order Statistics”, Comptes rendus de l’Academie bulgare des Sciences, vol. 61, ¹2, pp.253-260, 2008.
  3. Behar V., B. Vassileva, Chr. Kabakchiev, “Software Tool for GPR Data Simulation and Basic Processing”, Cybernetics and Information Technologies, Volume 8, ¹ 4, pp. 69-76, 2008.
  4. Z. Nikolov, Z. Hlebarov, C. Korsemov, H. Toshev, Distribution of Active and Reactive Energy in a Power Line, Cybernetics and Information Technologies, vol.8, ¹2, pp. 12-25, 2008.
  5. Garvanov I., “CFAR pulse detectors in the presence of impulse interference noise”, Cybernetics and Information Technologies, Volume 8, ¹ 2, (ISSN 1311-9702) pp. 26-39, 2008.
  6. Kabakchiev, Ch., V. Kyovtorov and I. Garvanov, “Secondary Applications Wireless Technologies Increasing the Information Potential for Defense Against Terrorism”, “Advances and Challenges in Mulitsensor Data and Information Processing”, NATO Security though Science Series: Information and Communication Security, IOS press Inc., vol. 8, pp. 236-242, 2007.
  7. Garvanov, I., Chr. Kabakchiev, H. Rohling, “Detection Acceleration in Hough Parameter Space by K-stage Detector”, Proc. of Conference "Numerical Methods and Applications - NMA06, Borovets, Bulgaria, LNCS 4310, pp 558-565, 2007,
  8. Behar V., L. Doukovska, Chr. Kabakchiev, “Target Detection and Estimation using the Hough Transform”, Springer-Verlag Berlin Heidelberg, Lecture Notes in Computer Science, LNCS 4310, pp. 525-532, 2007.
  9. Garvanov, I., Ch. Kabakchiev, “Radar Detection and Track in Presence of Impulse Interference by using the Polar Hough Transform”, Proc. of the European Microwave Association, Vol. 3, 2007, pp. 170-175, 2007.
  10. Doukovska L., “Hough Detector with Binary Integration Signal Processor”, Comptes rendus de l’Academie bulgare des Sciences, ISSN: 0861-1459, vol. 60, ¹5, pp. 525-533, 2007.
  11. Doukovska L., “Moving Target Hough Detector in Pulse Jamming”, Cybernetics and Information Technologies, ISSN: 1311-9702, vol. 7, ¹1, pp. 67-76, 2007.
  12. Garvanov, I., Chr. Kabakchiev, “Sensitivity of Track Before Detect Multiradar System Toward the Error Measurements of Target Parameters”, Cybernetics and Information Technologies, Volume 7, ¹ 2, pp.85-92, 2007.
  13. Doukovska L., “Moving Target Hough Detector in Randomly Arriving Impulse Interference”, Cybernetics and Information Technologies, ISSN: 1311-9702, vol. 7, ¹3, pp. 55-72, 2007.
  14. Kabakchiev Chr., L. Doukovska, I. Garvanov, “Cell Averaging Constant False Alarm Rate Detector with Hough Transform in Randomly Arriving Impulse Interference”, Cybernetics and Information Technologies, Vol. 6, ¹ 1, pp. 83-89, 2006.
  15. Z. Nikolov, G. Horozov, V. Vassilev, C. Korsemov, “Time and Frequency Synchronization in OFDM Communication Systems”, Cybernetics and Information Technologies, Vol. 6, ¹ 2, pp. 86-100, 2006.
  16. Garvanov, I., Ch. Kabakchiev, P. Daskalov, “Systolic Architecture for Adaptive Censoring CFAR PI Detector”, 5th International Conference “Large-Scale Scientific Computations”, LSSC-2005, Springer Verlag Berlin Heidelberg, Lectures Notes and Computer Science LNCS 3743, pp. 655-662, 2006.
  17. Behar, V., Chr. Kabakchiev, X.Rong Li, “Signal Processing for a Benchmark for Radar Allocation in the Presence of ECM”, “Signal Processing” Volume 85, Issue 4, April 2005, pp. 767-780, 2005.
  18. Kabakchiev Chr., L. Doukovska, I. Garvanov, “Hough Radar Detectors in Conditions of Intensive Pulse Jamming”, Sensors & Transducers Magazine (S&T e-Didest), Special Issue, August 2005, pp. 381-389, 2005.
  19. Kabakchiev Chr., I. Garvanov, V. Kyovtoriv, P. Daskalov, “Error Estimation in Target Height Finding Using VHF Radars and a Three-Antenna System Positioned one About the Other in a Radar Network”, Sensors & Transducers Magazine (S&T e-Didest), Special Issue, August 2005, pp. 390-398, 2005.
  20. Garvanov, I. ”CFAR PI Detector in the Presence of Binomial Distribution Flow From Randomly Arriving Impulse Interference”, Comptes Rendus de l’Academie Bulgare des Sciences, vol. 58, ¹5, pp. 545-552, 2005.
  21. N. Nikolov, Z. Nikolov, “A Communication System with Wavelet Packet Division Multiplexing in an Environment of White Gaussian Noise and Narrow-Band Interferences”, Cybernetics and Information Technologies, Vol. 5, ¹ 1, pp. 100-114, 2005.
  22. Kabakchiev Ch., I. Garvanov, L. Doukovska, “Adaptive Censoring CFAR PI Detector with Hough Transform in Randomly Arriving Impulse Interference”, Cybernetics and Information Technologies, Volume 5, ¹ 1, pp. 115-125, 2005.
  23. Kabakchiev Chr., I. Garvanov, V. Kyovtorov, “Height Target Estimation in Three Positioned Radar System”, Cybernetics and Information Technologies, Volume 5, ¹ 2, pp. 108-117, 2005.
  24. Garvanov, I., Chr. Kabakchiev and P. Daskalov, “Systolic Architecture of Adaptive Post Detection Integration CFAR Processor in Binomial Distribution Pulse Jamming”, 4th International Conference on "Large-Scale Scientific Computations”, LSSC-2003, “Lectures Notes and Computer Science”, LNCS 2907, pp. 448-455, 2004.
  25. Nikolov Z., R. Iinbor, Ch. Korsemov, H. Toshev, “Sampling and Interpolation of Periodic Signals”, Cybernetics and Information Technologies, Volume 4, ¹ 1, pp. 43-53, 2004.
  26. Chr. Kabakchiev, V. Kyovtorov and I. Garvanov: “Detection with the help of an OS CFAR processor in CDMA networks in the presence of multipath interference” Cybernetics and Information Technologies, Volume 4, ¹ 2, pp. 101-120, 2004.
  27. Behar, V., Chr. Kabakchiev, “Digital Quadrate Demodulation of LFM Signals Obtained by Lowpass Filtering”, "Numerical Methods and Applications - NM&A02, Borovets, Bulgaria, LNCS 2542, pp. 267-273, 2003.
  28. Garvanov I., V. Behar and Chr. Kabakchiev, “CFAR Processors in Pulse Jamming”, Proc. of Conference "Numerical Methods and Applications - NM&A02, Borovets, Bulgaria, LNCS 2542, pp. 291-299, 2003.
  29. Garvanov, I., “CFAR BI Detector in Binomial Distribution Pulse Jamming”, Compt. Rend. Acad. Bulg. Sci., vol. 56, ¹10, pp. 37-44, 2003.
  30. Garvanov I., Chr. Kabakchiev, “One and Two Dimensions CFAR Processors in the Presence of Strong Pulse Jamming”, Cybernetics and Information Òechnologies, vol.2, ¹ 1, pp. 58-72, 2002.
  31. Z.Nikolov, V.Vasilev, S.Babalov, “Characteristics of the interferences in a low voltage network”, Cybernetics and information technologies, vol.2, ¹ 1, pp.73-86, 2002.
  32. Kabakchiev Chr., L. Doukovska and I. Garvanov, “Comparative analysis of losses of CA CFAR processors in pulse jamming”, Cybernetics and Information Òechnologies, vol.1, ¹ 1, 2001 pp. 21-35.

Articles in Proceedings of Conferences and Symposiums
  1. Chr. Kabakchiev, I. Garvanov, L. Doukovska, V. Kyovtorov, H. Rohling, “Data Association Algorithm in Multiradar System”, 2008 IEEE Radar Conference, May 26-30, 2008 Rome, Italy, (ISSN: 1097-5659, ISBN: 1-4244-1593-X, IEEE Catalog N- 08CH37940C ), pp. 1771-1774, 2008.
  2. Doukovska L., Chr. Kabakchiev, V. Kyovtorov, I. Garvanov, “Hough Detector with an OS CFAR Processor in Presence of Randomly Arriving Impulse Interference”, Proc. of the 5-th European Radar Conference - EuRAD, Amsterdam, Holland, (ISBN: 978-2-87487-009-5), pp.332-335, 2008.
  3. Chr. Kabakchiev, I. Garvanov, “CFAR BI technique for Secondary Surveillance Radar”, Tyrrhenian International Workshop on Digital Communications/ Enhanced Surveillance of Aircraft and Vehicles (TIWDC/ESAV'08), Island of Capri, Italy, (ISBN: 978-88-903482-0-4), pp.150-153, 2008.
  4. Doukovska L., V. Behar, Chr. Kabakchiev, “Hough Detector Analysis by means of Monte Carlo Simulation Approach”, Proc. of the International Radar Symposium – IRS’08, Wroclaw, Poland, pp. 103-106, 2008.
  5. Garvanov I., Chr. Kabakchiev, L. Doukovska, V. Kyovtorov, H. Rohling, “Improvement in Radar Detection Through Window Processing in the Hough Space”, Proc. of the International Radar Symposium – IRS’08, Wroclaw, Poland, May 21-23, (ISBN: 978-83-7207-757-8, IEEE Catalog Number: CFP08RAS-PRT), pp. 139-144, 2008.
  6. Behar V., Chr. Kabakchiev, “A Simple Algorithm for Simulation of Stepped-Frequency GPR Images of Multi-Layered Media”, Proc. of the International Radar Symposium – IRS’08, Wroclaw, Poland, pp. 289-292, 2008.
  7. Vassileva B, Chr. Kabakchiev, “Singular Spectrum Analysis - an Effective Method for GPR Data Processing”, Proc. of the International Radar Symposium – IRS’08, Wroclaw, Poland, pp. 293-296, 2008.
  8. Kyovtorov V., C Kabakchiev, V.Behar, G.Kuzmanov, I.Garvanov, L.Doukovska, “FPGA Implementation of Low-Frequency GPR signal algorithm using Frequency Stepped Chirp Signals in the time domain”, Proc. of the International Radar Symposium – IRS’08, Wroclaw, Poland, May 21-23, (ISBN: 978-83-7207-757-8, IEEE Catalog Number: CFP08RAS-PRT), pp.297-300, 2008.
  9. Chr. Kabakchiev, I. Garvanov, H. Rohling, “Netted Radar Hough Detector in Randomly Arriving Impulse Interference”, The IET International Conference on Radar Systems, RADAR 2007, UK 15–18 October 2007, CD ROM 7a.1, pp.5, 2007.
  10. Behar V., L. Doukovska, Chr. Kabakchiev, H. Rohling, “Comparison of Doppler and Hough Target Velocity Estimation Techniques”, Proc. of the International Radar Symposium – IRS’07, Cologne, Germany, 2007, pp. 157-162, 2007.
  11. Vassileva B., Chr. Kabakchiev, “Low PRF Radar Target Detection in Strong Clutter Background”, Proc. of the International Radar Symposium – IRS’07, Cologne, Germany, 2007, pp. 455-459, 2007.
  12. Kabakchiev Chr., I. Garvanov, L. Doukovska, V. Kyovtorov, H. Rohling, “Data Association Algorithm in TBD Multiradar System”, Proc. of the International Radar Symposium – IRS’07, Cologne, Germany, pp. 521-525, 2007.
  13. Behar V., Chr. Kabakchiev, “Stepped-Frequency Processing in Low-Frequency GPR”, Proc. of the International Radar Symposium – IRS’07, Cologne, Germany, 2007, pp. 635-639, 2007.
  14. Kabakchiev Chr., I. Garvanov, L. Doukovska, V. Kyovtorov, “Comparison Between Two Multi-Sensor Fusion Techniques for Target Height Finding”, Proc. of the International Radar Symposium – IRS’07, Cologne, Germany, pp. 809-813, 2007.
  15. Garvanov, I., Chr. Kabakchiev, “Radar Detection and Track Determination with a Transform Analogous to the Hough Transform”, Proc. of International Radar Symposium – IRS 2006, Krakow, Poland, 2006, pp. 121-124, 2006.
  16. Doukovska L. and Chr. Kabakchiev, “Performance of Hough Detectors in Presence of Randomly Arriving Impulse Interference”, Proc. of the International Radar Symposium - IRS, Krakow, Poland, 2006 pp. 473-476. IEEE Catalog Number: 06EX1284, 2006.
  17. Garvanov, I., Chr. Kabakchiev, P. Daskalov, S. Babalov, “Rank CFAR Detector in Presence of Randomly Arriving Impulse Interference”, “CIE International Conference on Radar” – RADAR 2006, 16-19 Oct. 2006, Shanghai, China, pp. 220-224, 2006.
  18. Kabakchiev, Ch., V. Kyovtorov, I. Garvanov, “Error of land objects coordinates estimation using Secondary Applications for Wireless Technology”, DCCN proceedings, Sofia, November 2006, pp.48-53, 2006.
  19. Kabakchiev, Ch., I. Garvanov, V. Kyovtorov, “Height Finding Based on Networks of Radar Systems”, Proc. of the International Radar Symposium 2005, Berlin, Germany, 06-08 Sept., 2005, pp. 433-438, 2005.
  20. Garvanov, I., Chr. Kabakchiev, V. Kyovtorov, “Error Estimation in Target Height Finding Using VHF Radar and Three-Antenna System Positioned on Above the Other”, Proc. of International Workshop Distributed Computer and Communication Networks – DCCN 2005, Sofia, Bulgaria, pp. 222-238, 2005.
  21. Garvanov, I., Chr. Kabakchiev, “Excision CFAR BI Detector in Randomly Arriving Impulse Interference”, Proc. of IEEE International Radar Conference – RADAR 2005, Arlington, VA USA, 09-12 May 2005, pp. 950-955, 2005.
  22. Kabakchiev, Ch., I Garvanov, L. Doukovska, “Excision CFAR BI Detector with Hough Transform in the Presence of Randomly Arriving Impulse Interference”, Proc. of the International Radar Symposium 2005, Berlin, Germany, 06-08 Sept., 2005, pp. 259-264, 2005.
  23. S. Babalov, V. Vasilev, P. Daskalov, Chr. Kabakchiev: “DPCR -Development Platform for Digital Communications and Radars”, Proc. of the International Radar Symposium – IRS 2004, Warszawa, Poland, pp. 131-136, 2004.
  24. Garvanov, I. and Chr. Kabakchiev, “Sensitivity of API CFAR Detectors Towards Change of Input Parameters of Pulse Jamming”, Proc. of the International Radar Symposium – IRS 2004, Warszawa, Poland, pp. 233-238, 2004.
  25. Chr. Kabakchiev, V. Kyovtorov and I. Garvanov, “OS CFAR Detector for PN Signal Processing in Multipath Interference”, International Radar Conference – RADAR 2004, Toulouse, France, 19-21 Oct. 2004, CD - 6P-SP-121, 6 pp., 2004.
  26. Nikolov Z., V. Vasilev, L. Nikolova, “Frequency-Time Analysis of the Interference in 220V Network”, ICC’2004, Paris, France Vol. 1, pp. 118-122, 2004.
  27. Garvanov, I., and Chr. Kabakchiev, “Sensitivity of CFAR Processors Toward the Change of Input Distribution of Pulse Jamming”, Proc. of the International Conference on Radar "Radar 2003", Adelaide, Australia, pp. 121-126, 2003.
  28. Garvanov, I. and Chr. Kabakchiev, “K-stage CFAR Detection in Binomial Distribution Pulse Jamming”, Proc. of the International Radar Symposium – IRS 2003, Dresden, Germany, pp. 369-375, 2003.
  29. Angelova A., Chr. Kabakchiev, “Efficiency of MVDR Sidelobe Canceller in the Presence of Electronic Counter Measurement”, Proc. of the International Radar Symposium – IRS 2003, Dresden, Germany, pp. 615-620, 2003.
  30. Garvanov and Chr. Kabakchiev, “Average decision threshold of CA CFAR and excision CFAR detectors in the presence of strong pulse jamming”, Proc. of the German Radar Symposium – GRS 2002, Bonn, Germany, September, pp.615- 620, 2002.

Last update: March 2009