Lj. Milic - photo

Dr. Ljiljana D. Milić
Professor

University of Belgrade
School of Electrical Engineering and
Mihajlo Pupin Institute
Belgrade, Serbia

E-mail: milic@etf.bg.ac.rs

Biographical Data

Education: In 1962, she received the Dipl. Ing. degree in Electrical Engineering from the Faculty of Electrical Engineering, Department of Electronics and Telecommunications at the University of Belgrade. In 1973, she received the M.Sc. degree in electrical engineering, and in 1978 she received D.Sc. degree, both from the University of Belgrade. Her M.Sc. thesis was awarded by the Belgrade's Chamber of Economy prize as the best thesis in 1973/74 academic year.

Mihajlo Pupin Institute: In 1962, she joined Telecommunications Laboratory of Mihajlo Pupin Institute as an engineer-candidate. In Mihajlo Pupin Institute she achieved the positions of independent development engineer, head of the team, associate director of Telecommunications Department, and from 1987 to 1990 she was director of the Telecommunications Department. She obtained the title "Scientific Associate" in 1980, "Senior Scientific Associate" in 1986, and "Scientific Advisor" in 1992. She retired in 2008. Her present position is the Retired Scientific Advisor.

She spent 1974/75 academic year at École polytechnique fédérale de Lausanne, Département d'électricitê, Chaire de circuits et systemes, Lausanne, Switzerland, where she was a research assistant.

University professor: In early 1991 she became Associate Professor at the Faculty of Electrical Engineering of the University of Belgrade. She became Professor in 2003. Courses at the Telecommunications Department of Electrical Engineering Faculty: Digital Signal Processing and Multirate Systems. Prof. Milić acted as a reviewer for D.Sc. thesis at the universities in Belgrade, Niš, Novi Sad, Skopje, Linkoping, and at Indian Institute of Technology, Bombay (Mumbai). Her preset position is Retired Professor.

Visiting professor: She was invited a visiting professor by the Tampere University of Technology, Tampere International Center for Signal Processing (TICSP), where she spent summers in 2002, 2003 and 2005.

Scientific and professional achievements

Electrical filters were Mrs. Milić's early field of interest. She focused on computer applications to filter design, and in cooperation with Umberto Kamšek introduced computer-aided design as a method for filter design in the Pupin Institute. Several years of Mrs. Milić's research work were devoted to the sensitivity and tolerances of electrical filters. The results achieved by her studies in sensitivity and tolerances contributed substantially to the quality of numerous practical realizations at the Pupin Institute. In early eighties she started to deal with radio spectrum monitoring and headed the development of real time spectrum analyzer in cooperation with Umberto Kamšek, Marjan Djurić and Anka Kabović. Their contribution to this field was awarded by the Belgrade's Radiotelevision Annual Prize. Since the beginning of 70's, she has developed, individually or in cooperation, a number of original software packages based on self-research results.

Mrs. Milić was leader of numerous R&D projects for a variety of customers and contributed to the development of work and design methodology. In addition, she gave several practical solutions that went into production. She headed a development project for a US client. Since 1976 she has headed projects of the Ministry of Science and Technology. She took part in EU's COST, FP, and Horizon 2020 Programs.

In the field of sensitivity and tolerances, she proposed new solutions for the design of LC passive, RC active and digital filters, which minimize the effects of tolerances in components (or finite word-length effects) on the filter characteristics. With Prof. Jacques Neirynck, she introduced the concept of Equal Ripple Tolerance Characteristic establishing the standard for the best transfer function. She also demonstrated that the effects of losses in components can be analyzed using the sensitivity theory.

In vthe domain of real-time analysis of radio signals, she proposed with coauthors U. Kamšek, M. Djurić and A. Kabović a new solution for the optimal multichannel analog filter bank, and developed a new method for the analysis of the effect of tolerances in a multichannel filter bank.

In cooperation with Prof. Miroslav Lutovac, she has investigated the efficient implementations of digital filters, particularly multiplierless solutions. They introduced the new class of IIR digital filters entitled EMQF (Elliptic Minimal Q-Factors) digital filters, which are suitable for high-speed and low-power consumption systems. In their publications, it was shown that structures based on connections of all-pass sub-filters offer efficient and low-sensitivity solutions in many applications.

Her interest was focused on the design of variable digital filters, on multirate digital signal processing, and on frequency-response masking filters. In cooperation with Prof. Tapio Saramäki, she developed a new efficient method for the frequency transformation for IIR digital filters, and also for the three classes of complementary IIR filter pairs. Applying efficient IIR digital filters based on all-pass sub-filters and EMQF transfer functions, she developed in cooperation with Prof. Miroslav Lutovac and with Prof. Jelena Ćertić several efficient implementations for sampling-rate conversion systems, and also developed several solutions for filters and two-channel filter banks using the frequency response masking technique. The new filtering techniques provide sharp filters and filter banks, thus improving the use of frequency spectrum. She proposed some new implementations for tree-structure multichannel filter banks.

Awards and recognitions: Belgrade's Chamber of Economy prize for the best M.Sc. thesis in the academic year 1973/74, Best paper award for the papers presented at ETAN conferences, Circuit Theory Section, in 1970 and 1977, Radio Television Belgrade Annual Prize for achievements in telecommunications in 1987, "Prof. Branko Raković" award for the best paper published in the scientific journal in 1987 in the field of circuit theory and applications. Coauthor of the best young researcher's paper presented at the ETRAN Conference, Circuits and Systems, and Signal Processing Section, in 2004. "Ilija Stojanović" award for the best scientific paper presented at the Telecommunications Forum TELFOR 2008. She received the ETRAN Grand Charter for the achievements in telecommunications in 2006.

Organizer of special sessions: In cooperation with Dr. Miroslav Lutovac, she organized The Special Session on Low-Complexity Digital Filters for the European Conference on Circuit Theory and Design (ECCTD), Stresa, Italy, 1999. In cooperation with Prof. Tapio Saramäki and Dr. Robert Bregović, she organized The Special Session on Advances in Multirate Filter Design and Implementations for the IEEE Asia Pacific Conferencde on Circuits and Systems APCCAS 2006, Singapore, December 4-7, 2006. In cooperation with Prof. Tapio Saramäki, she organized The Special Session on Advances in Multirate Filters and Filter Banks for the International Symposium on Image and Signal Processing and Analysis, ISPA 2007, Istanbul, Turkey, September 27-29, 2007. She organized The Special Session on Advances in Low-Complexity Digital Filtering at the International Conference on Green Circuits and Systems, ICGCS 2010, Shanghai, China, June 21-23 2010.

Reviewer: She acted as a reviewer for leading international journals and confernces: IEEE Transactions on Signal Processing, IEEE Signal Processing Letters, IEEE Transactions on Circuits and Systems, Signal Processing, AEU - International Journal for Electronics and Communications, Circuits, Systems&Signal Processing, Journal of Circuits, Systems and Computers, and for many IEEE conference: ISCAS, ICASP, ISPA, APCCAS, EUROCON and others.

Telecommunications Forum TELFOR: Prof. Milić acted as a Program Committee member, the Program Committee vice chair, and the Organizing Committee Chair. Prof. Milić served as Executive Editor for the TELFOR Journal since it was established in 2009.

Dr. Milić is the Life Senior Member of IEEE and a full member of the Academy of Engineering Sciences of Serbia. Her current research interest is in digital filters, multirate digital signal processing, and in DSP applications to communications and digital audio.