Journals

2013	Raul Oneț, Marius Neag, István Kovács, Marina Țopa, Saul Rodriguez, Ana Rusu, “Compact Variable Gain Amplifier for a Multistandard WLAN/WiMAX/LTE Receiver”, IEEE Transactions on Circuits and Systems I, ISSN : 1549-8328,
2013	Irina Mureşan, Botond Sandor Kirei, Cristian Conţan, Marina Dana Ţopa, “Rapid Prototyping of Sub-band Acoustic Echo Cancellers on FPGA Platforms”, Advances in Electrical and Computer Engineering, ISSN 1582-7445, e-ISSN: 1844-7600, Volume 13, Number 3, pp. 45-50, 2013.
2013	Cristian Conţan, Botond Sandor Kirei, Marina Dana Ţopa, “Modified NLMF Adaptation of Volterra Filters Used for Nonlinear Acoustic Echo Cancellation”, Signal Processing, Elsevier, ISSN 0165-1684, Volume 93, Issue 5, pp.1152-1161, 2013.
2012	Botond Sandor Kirei, Marius Neag, Marina Dana Ţopa, “Blind Frequency-Selective I/Q Mismatch Compensation Using Subband Processing”, Circuits and Systems II: Express Briefs, IEEE Transactions on, ISSN : 1549-7747, Vol. 59 , Iss. 5, pp. 302 – 306, 2012.
2011	Botond Sandor Kirei, Marina Dana Ţopa, Irina Mureşan, Ioana Homănă, Norbert Toma, “Blind Source Separation for Convolutive Mixtures with Neural Networks”, Advances in Electrical and Computer Engineering, ISSN 1582-7445, e-ISSN: 1844-7600, Volume 11, Number 1, pp. 63-68, 2011.
2011	Marina Dana Ţopa, Norbert Toma, Botond Sandor Kirei, Ioana Homănă, Marius Neag, Gilbert De Mey, “Comparison of Different Experimental Methods for the Assessment of the Room’s Acoustics”, Acoustical Physics, ISSN 1063-7710, e-ISSN: 1562-6865, Volume 57, Number 2, pp.199-207, 2011.
2010	Marina Dana Ţopa, Irina Mureşan, Botond Sandor Kirei, Ioana Homănă, “Digital Adaptive Echo-Canceller for Room’s Acoustics Improvement”, Advances in Electrical and Computer Engineering, ISSN 1582-7445, e-ISSN: 1844-7600, Volume 10, Number 1, pp. 50-53, 2010.

2013	Bianca Făgăraş, Ingrid Kovacs, Anamaria Oros, Monica Răfăilă, Marina Dana Ţopa, Manuel Harrant, “On Replication in Design of Experiments”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 54, Number 3, pp. 37-41, 2013.
2013	Bianca Făgăraş, Ingrid Kovacs, Anamaria Oros, Monica Răfăilă, Marina Dana Ţopa, Manuel Harrant, “Blocking in Design of Experiments”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 54, Number 3, pp. 42-46, 2013.
2013	Botond Sandor Kirei, Marius Gheorghe Neag, Marina Dana Ţopa, “Matlab Toolbox for RF Modeling”, Advanced Engineering Forum, ISSN 2234-991X, Vol. 8-9, pp. 500-507, 2013.
2013	Bianca Alexandra Făgăraş, Cristian Conţan, Marina Dana Ţopa, “Acoustic Echo Cancellation Using Wavelet Transform and Adaptive Filters”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 54, Number 2, pp. 7-13, 2013.
2012	Norbert Toma, Marina Ţopa, Ioana Sărăcuţ, “Improvement of Jot’s Reverberation Algorithm”, Acta Technica Napocensis – Electronics and Telecommunications,ISSN 1221-6542, Volume 53, Number 3, pp.12-15, 2012.
2013	Cristian Conţan, Marina Dana Ţopa, Botond Sandor Kirei, Ingrid Maria Kovacs, “A Derived Robust Statistics Approach For Adaptive Volterra Filters Applied In Nonlinear Acoustic Echo Cancellation Scenarios”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 54, Number 1, pp.1-7, 2013.
2013	Ingrid Maria Kovacs, Cristian Conţan, Marina Ţopa, “Convergence Rate and Steady-State Error Improvement in Acoustic System Identification Using the Combination of Linear NLMS Adaptive Filters”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 54, Number 1, pp. 8-14, 2013.
2013	Adrian Călin Fărcaş, Marina Dana Ţopa, “On The Choice Of The Method For Obtaining The Room Impulse Response”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 54, Number 1, pp. 34-41, 2013.
2012	Norbert Toma, Marina Ţopa, Ioana Sărăcuţ, “Improvement of Jot’s Reverberation Algorithm”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 53, Number 3, pp.12-15, 2012.
2012	Marina Dana Ţopa, Norbert Toma, Botond Sandor Kirei, Angelo Farina, Ioana Sărăcuţ “Experimental Acoustic Evaluation of An Auditorium”, Advances in Acoustics and Vibration, ISSN: 1687-6261 (Print), ISSN: 1687-627X (Online), Volume 2012, Article ID 868247, 8 pages, 2012.
2012	Cristian Conţan, Marina Ţopa, “Decoupled Second-Order Volterra Filter Structure Using The NLMF Adaptive Algorithm For Nonlinear Acoustic Echo Cancellation”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 53, Number 2, pp.56-60, 2012.
2012	Ioana Sărăcuţ, Victor Popescu, Marina Dana Ţopa, “A MATLAB GUI For Simulating The Propagation of The Electromagnetic Field in a 2-D Infinite Space”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 53, Number 2, pp.61-66, 2012.
2011	Cristian Conţan, Marina Ţopa, “Comparison between the NLMS and the NLMF Adaptation Algorithms Applied on Volterra Filters for Nonlinear Acoustic Echo Cancellation”, Romanian Journal of Acoustics and Vibration, ISSN 1584-7284, Volume VIII, issue 2, pp. 103-110, 2011.
2011	Ioana Homănă, Irina Mureşan, Marina Ţopa, Cristian Conţan, “FPGA Implementation of LMS and NLMS Adaptive Filters for Acoustic Echo Cancellation”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 52, Number 4, pp. 13-16, 2011.
2011	Corina Bota, Botond Sandor Kirei, Albert Fazakas, Marina Ţopa, “The Implementation of Schroeder Reverberator on a FPGA Platform Using XILINX System Generator”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 52, Number 2, pp. 55-60, 2011.
2011	Ioana Homănă, Irina Mureşan, Marina Ţopa, Cristian Conţan, “FPGA Implementation of an Acoustic Echo Canceller”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 52, Number 2, pp. 44-47, 2011.
2011	Cristian Conţan, Marina Ţopa, Ioana Homănă, Irina Mureşan, “Nonlinear System Identification Using Adaptive Combinations of Volterra Filters”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 52, Number 2, pp. 48-53, 2011.
2010	Erwin Szopos, Marina Ţopa, Lelia Feştilă. Horia Hedeşiu, “FIR Synthesis of the Human Hearing Mechanism Response”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 51, Number 4, pp. 41-44, 2010.
2010	Cristian Conţan, Marina Ţopa, Botond Sandor Kirei, Ioana Homănă, “Nonlinear System Identification using Adaptive Volterra Filters for Echo Cancelling”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 51, Number 4, pp. 35-40, 2010.
2010	Erwin Szopos, Marina Ţopa, Lelia Feştilă. Horia Hedeşiu, “FIR Synthesis of the Human Hearing Mechanism Response”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 51, Number 4, pp. 41-44, 2010.
2010	Ioan Cătuna, Erwin Szopos, Marina Dana Ţopa, “LabView FPGA Implementation of Digital Reverberators”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 51, Number 3, pp. 41-44, 2010.
2010	Marius Neag, Raul Oneţ, Marina Ţopa, “Analysing the Stability of Circuits Based on Operational Amplifiers by Using Frequency-Domain Simulations“, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 51, Number 2, pp. 46-54, 2010.
2010	Norbert Toma, Marina Dana Ţopa, Botond Sandor Kirei, Ioana Homănă, “Acoustic Analysis of a Room”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 51, Number 2, pp. 14-19, 2010.
2009	Marius Neag, Istvan Kovacs, Marina Ţopa, “Novel Voltage-Controlled Amplifiers For Multistandard Integrated Radio Receivers”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 50, Number 3, pp. 21-26, 2009.
2009	Norbert Toma, Marina Ţopa, Irina Mureşan, Botond Sandor Kirei, Marius Neag, Albert Fazakas, “Acoustic Modelling and Optimization of a Room”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 50, Number 2, pp. 25-30, 2009.
2009	Botond Sandor Kirei, Marina Ţopa, Marius Neag, Raul Ciprian Oneţ, “I/Q Imbalance Compensation Algorithm Based on Neural Networks”, Journal of Automation, Mobile Robotics & Intelligent Systems, ISSN 1897-8649, Vol. 3, No.2, pp. 88-92, 2009.
2008	Irina Dornean, Marina Ţopa, Botond Sandor Kirei, “Digital Implementation of Artificial Reverberation Algorithms”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 49, Number 4, pp.1-4, 2008.
2007	Irina Dornean, Marina Ţopa, Botond Sandor Kirei, Erwin Szopos, “FPGA Implementation of the Adaptive Least Mean Square Algorithm”, Acta Technica Napocensis – Electronics and Telecommunications, ISSN 1221-6542, Volume 48, Number 4, pp.19-22, 2007.
2007	Norbert Toma, Marina Dana Ţopa, Erwin Szopos, “Design and Performance Analysis of Reverberation Algorithms“, Acta Technica Napocensis, ISSN 1221-6542, Volume 48, Number 1, pp. 35-43, 2007.
2006	B.S. Kirei, A. Fazakas, Marina Ţopa, “MATLAB Modeling and FPGA Implementation of Neuronal Algorithms for Blind Audio Signal Separation”, Acta Technica Napocensis, ISSN 1221-6542, Volume 47, Number 4, pp. 1-6, 2006.
2006	Liviu Nedelea, Marina Ţopa, Marius Neag, Lelia Feştilă, “A Framework for Designing Cascaded Analog Filters Tailored to Multiple Requirements”, Acta Technica Napocensis, ISSN 1221-6542, Volume 47, Number 1, pp. 15-22, 2006.
2005	Norbert Toma, Marina Ţopa, Erwin Szopos, “Reverberation Algorithms”, Acta Technica Napocensis, ISSN 1221-6542, Volume 46, Number 2, pp. 27-34, 2005.
1996	Marina Dana Ţopa, P. Wambacq, G. Gielen, W. Sansen. E. Simion, “Factorisation Strategies for Approximate Symbolic Network Analysis”, Acta Electrotehnica Napocensis, Volume 37, Number 1, pp.52-53, 1996.
1995	Marina Dana Ţopa, E. Simion, “Computer-Aided Symbolic Network Analysis”, Acta Electrotehnica Napocensis, Vol. 36, No.1, pp. 68-70, 1995.

2012	Ingrid Kovacs, Marina Ţopa, “Adaptive Combination of Linear NLMS Filters and its Application in Acoustic System Identification”, Novice Insights, ISSN 1842-6085, 2012.
2011	Botond Sandor Kirei, Marius Neag, Tomina Fabiola Salajan, Marina Dana Ţopa, “Matlab Modeling of Zero-IF Radio Receivers by Using Object Oriented Programming”, ElectroRevue, ISSN 1213-1539, Vol. 2, N0. 4/2011, pp. 72-78, December 2011. (http://www.elektrorevue.cz/en/articles/analogue-technics/0/matlab-modeling-of-zero-if-radio-receivers-by-using-object-oriented-programming/).
2009	Norbert Toma, Marina Ţopa, “Modelarea şi optimizarea acusticii încăperilor”, Volumul Simpozionului naţional “Edmond Nicolau”, ISBN 978-973-53-0017-3, Vol. I, pp.1530-156, 2009.
2009	Ecaterina Arvai, Marina Ţopa, “Echo Cancellation Using Sub-band Adaptive Filtering”, Novice Insights, ISSN 1842-6085, Vol. 7, pp.xxx, 2009.
2008	Norbert Toma, Marina Ţopa, “Reverberatoare timpurii “, Şcoala Sătmăreană, ISSN 1584-0662, Anul V, Nr 10, pp. 147-152, Noiembrie 2008.
2007	Norbert Toma, Marina Dana Ţopa, “Analiza fenomenului de reverberaţie“, Şcoala Sătmăreană, ISSN 1584-0662, Anul IV, Nr 8, pp. 116-123, Septembrie 2007.
2006	Norbert Toma, Marina Ţopa, Erwin Szopos, “Épületek akusztikai modellezése reverberátorok felhasználásával – Modelling the acoustics of buildings using reverberators”, Müszaki Szemle – Technical Review, ISSN 1454-0746, 35/2006, pp. 37-48, 2006.
2006	Norbert Toma, Marina Ţopa, Gabriela Urs, “Simularea asistată de calculator a circuitelor electronice”, Şcoala sătmăreană, ISSN 15844-0662, Volume III, Nr. 7, pp. 103-108, December 2006.
2004	Erwin Szopos, Norbert Toma, Marina Ţopa, “Adaptive Filtering Algorithms”, Buletinul Ştiinţific al Universităţii “Politehnica” din Timişoara, România, ISSN 1583-3380, Tomul 49(63), Fascicola 2, pp. 81-86, 2004.
2000	Adrian Gogu, Marina Ţopa, “Implementation Aspects of Jot’s Reverberator”, Electrical Engineering Research Report, University of Naples “Federico II”, Number 9, July 2000, pp. 45-49.
1984	I. A. Viorel, Marina Dana Ţopa, Z. Kovacs, “Calculul permeanţei întrefierului la un motor liniar cu reluctanţă variabilă”, Buletinul ştiinţific al Institutului Politehnic Cluj-Napoca, seria: Electrotehnică-Energetică-Informatică, vol. 27, pag. 27-32, 1984.