|
Vol: 56(70) No: 3 / September 2011 Integration of Virtual and Hands-on-Laboratory Experience in Learning of Filtering Concepts Radojka Krneta Department of Computer Engineering, University of Kragujevac, Technical Faculty, Svetog Save 65, 32000 Čačak, Serbia, phone: (+381) 32 302-762, e-mail: rkrneta@gmail.com, web: www.tfc.kg.ac.rs/r_krneta Đorđe Damnjanović Department of Computer Engineering, University of Kragujevac, Technical Faculty , Svetog Save 65, 32000 Čačak, Serbia, phone: (+381) 32 302-721, e-mail: fic177@hotmail.com, web: www.tfc.kg.ac.rs/d_damnjanovic Danijela Milošević Department of Computer Engineering, University of Kragujevac, Technical Faculty , Svetog Save 65, 32000 Čačak, Serbia, phone: (+381) 32 302-714, e-mail: danjela@tfc.kg.ac.rs, web: www.tfc.kg.ac.rs/d_milosevic Keywords: band pass filter, filter characteristics, virtual experiments, hardware development platform, visualization of DSP theory, learning styles, blended course. Abstract Better understanding of the acquired theoretical knowledge in the field of digital signal processing, for their successful use in future engineering practice, is achieved by introducing interactive virtual and hands-on laboratory experiments. In this paper we present realization of LabVIEW virtual interactive DSP experiments and hardware DSP laboratory experiments on the NI-ELVIS II + development platform as a part of our ongoing efforts in DSP laboratory development. These experiments can be used in the DSP lab for "visualization" of filtering concepts. For the purpose of “visualization”, LabVIEW filter palette has been used for the virtual experiment of band pass digital filter design and active band pass filter has been realized on hardware developing platform NI-ELVIS II+, for the purpose of hands-on DSP experiments. Theoretical characteristics of active band pass filter validated by measurements on realized hardware model. Pedagogical issues concerning meeting different learning styles through integration of virtual and hands-on laboratory experiments in DSP laboratory are elaborated. The traditional approach of teaching engineering concepts that comes as the combination of classroom teaching and homework exercises, lacks the student's intuition for applying same concepts to different new problems. The integration of virtual and hands-on laboratory experience in addition on theoretical filtering concepts creates the perfect match for improving student practical skills. On the basis of mixture of virtual and hands-on exercises and web-based teaching materials, blended delivery mode of DSP course is enabled. References [1] S. Li and A. A. Khan, “Developing Digital Measurement and Analysis Laboratory in Circuits and Electronics Lab at TAMUK“, in: Proceedings of 2004 American Society for Engineering Education Annual Conference & Exposition, Available:http://www.ni.com/pdf/academic/us/2004-165_final.pdf. [2] T. S. ElAli, “Discrete Systems and Digital Signal Processing with Matlab®“, CRC Press LLC, 2004. [3] V. Marozas, V. Dumbrava, “Motivating the Students to Study the Basics of Digital Signal Processing by using Virtual Learning Environment“, Electronics and Electrical Engineering, 2010, No. 6 (102), Available: http://www.ktu.lt/lt/mokslas/zurnalai/elektros_z/z102/22__ISSN_1392-1215_Motivating%20the%20Students%20to%20Study%20the%20Basics%20of%20Digital%20Signal%20Processing%20by%20using%20Virtual%20Learning%20Environment.pdf [4] R. Krneta, M. Bjekić, A. Dostanić, M. Acović, “Influence of use of the MATLAB as underlying technology on development of the curriculum for the course in signals and systems”, in: Proceedings of 2007 14th International Conference on Systems, Signals and Image Processing, IWSSIP 2007 and 6th EURASIP Conference Focused on Speech and Image Processing, Multimedia Communications and Services EC-SIPMCS 2007, Maribor, Slovenia , 2007 [5] C. L. Clark, “LabVIEW Digital Signal Processing and Digital Communications“, McGraw-Hill, 2005. [6] A. Milovanović M. Bjekić, B. Koprivica, “Virtual instrumentation“, in Serbian, Tehnički fakultet Čačak, 2010 [7] Krneta, R.; Damnjanovic, D.; Dokovic, M., “Labview-based laboratory environment for learning of filtering concepts”, in: Proceedings of 6th IEEE International Symposium on Applied Computational Intelligence and Informatics (SACI 2011), Timisoara, Romania, 2011, pp.451-454. [8] A. C. Bovik, “What You See Is What You Learn”, IEEE Signal Processing Magazine, vol. 27, no. 5, September 2010, pp. 117-123. [9] S. W. Smith, “Digital signal processing, A practical guide for engineers and scientists”, Newnes, USA, 2003. [10] Band Pass Filter Creation with NI ELVIS, NI Developer Zone, Available: http://zone.ni.com/devzone/cda/epd/p/id/442. [11] Picone, J.; Hamaker, J. E.; Brown, R.; “Modern DSP education: The story of three Greek philosophers”, IEEE Signal Processing Magazine, May 31, 1999 http://www.isip.piconepress.com/publications/journals/ieee_spmag/1999/education/paper_v3.pdf. [12] http://sine.ni.com/nips/cds/view/p/lang/en/nid/14890. [13] http://search.ni.com/nisearch/app/main/p/ap/tech/lang/en/pg/1/sn/n6:SignalProcessingAnalysis,ssnav:dzn/. |