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Prof. Dr. Eng. Guergana Mollova

Faculty of Structural Engineering, Department Computer-Aided Engineering - Lecturer (deceased)

Prof. Dr. Eng. Guergana Mollova
Office Room B18
Student Hours

Monday: 12-13 h.
Thursday: 10-11 h.

Phone 9635245/309
E-mail mollova_fce@uacg.bg
Year Started 1992


Programming and Application of Computer Systems (PACS)
Computer-Aided Engineering (CAE)


M.Sc. - Technical University of Sofia, 1988
Ph.D. - Technical University of Sofia, 1993

Language Skills

English, Russian, German

Science Interests

Digital signal processing, Digital filters, Computer-aided design, Application of digital filters for processing of accelerograms and seismic analysis, Two- and multidimensional filtering, Digital differentiators and Hilbert transformers


Member of the Union of Scientists in Bulgaria (USB) - since 1994
Member of the Union of Automation and Informatics in Bulgaria (UAI) - since 1996
Member of the Institute of Electrical and Electronic Engineers, Inc.(IEEE) - since 1996

Participation in Research Projects

874-041/87 "Software Systems for Education on Network Theory and Computer-Aided Design Courses", CAS Lab.,TU-Sofia

027-09V/87 "Development of Work-Station Equipment for Electrical Engineers", CAS Lab., TU-Sofia (with Dept.of CAE, LETI-St.Petersburg, Russia)

1501-3/91 "Application of Expert System for Circuits Analysis", CAS Lab., TU-Sofia

1524-3/91 "Application of ESIS 1-A Expert System", TU- Sofia

IS-515/95 "Object-Oriented Monitoring of Executable Program Modules", UACEG-Sofia, Dept. of Computer-Aided Engineering

A/97/0413 "Computer-Aided Design of Digital Filters", DAAD Research Grant, April-June
1997, University of Erlangen-Nuremberg, Germany

IMG-1050/1998 "Computer Graphics", IMG Tempus Project, March-April 1998, Delft University of Technology, The Netherlands

IV BUL 1059420 STP Alexander von Humboldt Foundation Grant, March 2001-April 2002, University of Elangen-Nuremberg, Germany, Follow-up Program visits, June-Sept. 2004, University of Potsdam, January 2006, April-June 2006

Austrian Science Fund (FWF) Project M992-N15 “New Methods for Design and Implementation of Multidimensional Digital Filters”, Vienna University of Technology, 2007-2008.

Academic Positions

Assistant Professor - 1992-1999
Associate Professor - 2000-2012; Professor - 2013-present
Head of Department "Computer-Aided Engineering" - 2000-2004, 2008-present
Vice Dean for Research and International Activity - 2008 - Oct. 2010



Mollova G.S., "Optimal Recursive Cascade Filter Design with Minimum Rezulting Round-off Error", Izv.Vuzov, Priborostroenie, no.12, 1991, Sankt Petersburg, Russia, pp. 39-49 (in Russian)

Mollova G.S., "Variance of Quantization Error at the Output of Recursive Digital Filter", Proc. 3rd URSI International Symposium on Signals, Systems and Electronics - ISSSE'95, Oct.25-27, 1995, San Francisco, CA, USA, pp. 439-442

Mollova G.S., E. Gurova, "An Efficient Approach for Application of Higher Order S-Z Transformations", Proc. 9th International Conference "Systems for Automation of Engineering and Research" (SAER'95), Sept.24-26, 1995, Varna, Bulgaria, pp. 30-34

Mollova G.S., "Weighted Mean Squared Error Criterion with Fixed-Levels Modification for Linear-Phase FIR Filters Design", Proc. 3rd IEEE Int. Conference on Electronics, Circuits and Systems - ICECS’96, Oct.13-16, 1996, Rhodes, Greece, pp. 275-278

J.H.F. Ritzerfeld, G.S. Mollova, "Word Length Limitation in the Limit Cycles-Free Biquad Structures", Proc. 7th Annual ProRISC / IEEE Workshop on Circuits, Systems and Signal Processing, Nov.27-28, 1996, Mierlo, The Netherlands, pp.267-272

Mollova G.S., "Computer Aided Study of Finite Word Length Effects on IIR Frequency Response", Proc. 8th IEEE Asia-Pacific Microwave Conference - APMC’96, Dec.17-20, 1996, New Delhi, India, v.3, pp.833-836

Mollova G.S., "Weighted Mean Squared Error Criterion with Fixed-Levels Modification for Linear-Phase FIR Filters Design", Circuits, Systems and Signal Processing, v.15, no.5, 1996, Birkhauser Publ., Cambridge, MA, USA,pp.581-595

Mollova G.S., "Analytical Least Squares Design of 2-D Fan Type FIR Filter", Proc. 13th Int. Conference on Digital Signal Processing – DSP97, July 2-4, 1997, Santorini, Greece, v.2, pp.200-204

J.H.F. Ritzerfeld, G.S. Mollova, "Controlled Rounding in Low Noise Digital Filter Structures", Proc. 8th Annual ProRISC / IEEE Workshop on Circuits, Systems and Signal Processing, Nov. 28, 1997, Mierlo, The Netherlands, pp.499-504

Mollova G.S., R. Unbehauen, "Design of Recursive Filters with Constant Group Delay and Chebyshev Attenuation", Proc. 23rd Int. Conference on Acoustic, Speech, and Signal Processing - ICASSP98, May 12-15, 1998, Seattle, WA, USA, v.3, pp.1257-1260

Mollova G.S., "Compact Formulas for Least-Squares Design of Digital Differentiators", IEE Electronics Letters, v.35, no.20, Sept. 30, 1999, London, England, pp.1695-1697

Mollova G.S., "Efficient Design of FIR Digital Differentiators Using Least-Squares Approach", 1st Balkan Conference on Signal Processing, Communications, Circuits, and Systems, June 2-3, 2000, Istanbul, Turkey, pp.173-176

Mollova G.S., R.Unbehauen, "Analytical Design of Higher order Differentiators Using Least-Squares Technique", IEE Electronics Letters, v.37, no.17, 16th Aug. 2001, London, England, pp.1098-1099, errata: v.37, no.22, Oct. 25, 2001, p.1372

Mollova G.S., "Comparison Between Fullband and Non-Fullband Higher-Order Differentiators Designed by LS Technique", URSI Convention on Radio Science and 2nd FWCW Workshop, Tampere Univ. of Technology, Finland, Oct.23-24, 2001, pp.73-74

Mollova G.S., R.Unbehauen, "Fullband Higher Order Differentiators Based on LS Method", 12th Annual ProRISC / IEEE Workshop on Circuits, Systems and Signal Processing, Nov.29-30, 2001, Veldhoven, The Netherlands, pp.507-510

Mollova G.S., "Digital Filters Application in Earthquake Data Processing", Proc. Int. Conf. 'St.Zagora', June 3-5 2005, Stara Zagora, Bulgaria, v.1. pp.14-19 (in Bulgarian, abstract in English)

Mollova G.S., "Effects of Digital Filtering in Data Processing of Seismic Acceleration Records”, EURASIP Journal on Advances in Signal Processing, vol.2007, no.3, Article ID 29502, pp.1-9

Mollova G., F.Scherbaum, "Influence of parameters selection in Chebyshev filters on the strong motion data processing", Bulletin of Earthquake Engineering, Springer Netherlands, vol.5, no.4, Nov.2007, pp.609-627

Mollova G., "Design of FIR LS Hilbert Transformers through fullband differentiators",
41st Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, USA, Nov.04-07, 2007, pp.1121-1125

Mollova G., W.F.G. Mecklenbraeuker, "Three-dimensional cone FIR filters design using the McClellan transform", 41st Asilomar Conference on Signals, Systems, and Computers, Pacific Grove, CA, USA, Nov.04-07, 2007, pp.1116-1120

Mollova G., W.F.G. Mecklenbraeuker, "McClellan based design approach for 3-D digital filters with minimization of the integral squared error", Int. Journal of Mathematics and Computers in Simulation, vol.1, issue 1, 2007, pp.18-25

Mollova G., W.F.G. Mecklenbraeuker, "Design of 3-D FIR digital filters using integral squared error criterion and transformation method", Proc. 2nd WSEAS Int.Conf. on Circuits, Systems, Signal and Telecommunications, Acapulco, Mexico, Jan.25-27,2008, pp. 23-28
Mollova G.S., "Programming and application of computers, C++ language", Publ.House of the Union of Scientists in Bulgaria, 2004, pp.144., ISBN954-8329-62-X (University Textbook)

More Info


1995 – Union Radio-Scientifique Internationale (URSI) – Young Scientists Program Award, San Francisco, USA, October 1995 (ISSSE’95)
1997 – Deutsches Academisher Austaushdienst (DAAD) Forschungstipendium /German foreign academic exchange services/ research fellowship
1998 – Outstanding scientific achievements award – Union of Scientists in Bulgaria (USB)
1999 – Senior Member of the IEEE (Signal Processing Society)
2000 – Alexander von Humboldt Foundation Fellowship
2001 – IEEE Signal Processing Society "Valued Services and Contributions" Certificate as a SP Chapter Chair and compliments for IEEE Region 8 activities
2007 - Lise-Meitner Program Fellowship (Austrian Science Fund)



Study materials

Examination rules