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ON THE USE OF LABVIEW IN SIGNALS AND SYSTEMS

1. Introduction Computer based data acquisition and instrumentation control packages are embedded in several industrial and education applications. The National Instruments Laboratory Virtual Instrument Engineering Workbench (LabVIEW) package is tailored for data acquisition, data processing and instrumentation control. LabVIEW is a graphical programming language and can interface with external acquisition and signal processing devices1.

In this paper, we describe the use of LabVIEW in undergraduate signals and systems courses. The understanding of signals and systems is central to several areas in Electrical and Computer Engineering. Signals and systems courses serve as prerequisites for higher level courses in signal processing, communications and controls2,3. The availability of a wide range of functions and toolkits for in LabVIEW enables exposition to algorithm, software and hardware issues in signal analysis and filtering. We have started an education project with National Instruments aimed at developing and embedding software and laboratory exercises for signals and systems courses. The main objectives of the exercises are to provide students with an introduction to graphical programming and also enable them simulate the concepts learnt in the course. These labs provide hands-on experiences associated with concepts in signals and systems, DSP, communications, and controls. Students first learn the fundamentals of LabVIEW graphical programming including array and cluster processing, loops and file handling. Furthermore, interesting features of LabVIEW such as the Mathscript functionality and simulation loops are introduced. Students are also exposed to different toolkits such as Digital Filter Design, Control Design and Modulation. The rest of the paper is organized as follows. Section 2 introduces the LabVIEW functions and toolkits used in the laboratory exercises. The signals and systems LabVIEW exercises are given in Section 3. Finally, the assessment of the labs and student responses are presented in Section 4 and the paper is concluded in Section 5.

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Jayaraman Thiagarajan, J., & Tsakalis, K., & Spanias, A., & Thornburg, H. (2009, June), On The Use Of Labview In Signals And Systems Paper presented at 2009 Annual Conference & Exposition, Austin, Texas. 10.18260/1-2--5299