June 24, 2017
June 24, 2017
June 28, 2017
Electrical and Computer
Abstract – Modern descriptions of analog communication schemes are mathematics based using transform theory and block diagrams. This presentation style leaves undergraduate students with the challenge of relating these theories to real world circuit implementations. This is particularly true if the lecture class does not have a complementary laboratory component. This paper attempts to bridge this gap by presenting a basic yet comprehensive project that can be used to demonstrate amplitude modulation and demodulation theory. It is specifically designed to stir the interest of junior or senior level electronics minded electrical engineering students. In this project, a double sideband large carrier waveform is produced using a simple switching modulator circuit. The resulting amplitude modulation (AM) waveform is then demodulated using an envelope detector circuit. The proposed project requests that students perform a circuit simulation as well as an actual circuit implementation. The circuit behavior is studied via both analysis using software tools and measurement using hardware components. The project further requires that the electrical signals are visualized in both the time and frequency domain to enhance concept understanding. The paper outlines an introduction to the modulation theory along with an overview of the necessary circuits and concepts. Additionally, suggested student activities, project assignment alternatives, along with detailed mathematical solutions are provided.
Barsanti, R. J., & Skinner, J. S. (2017, June), Amplitude Modulation Circuit Implementation for use in a Communication Course for Electrical Engineering Students Paper presented at 2017 ASEE Annual Conference & Exposition, Columbus, Ohio. 10.18260/1-2--27545
ASEE holds the copyright on this document. It may be read by the public free of charge. Authors may archive their work on personal websites or in institutional repositories with the following citation: © 2017 American Society for Engineering Education. Other scholars may excerpt or quote from these materials with the same citation. When excerpting or quoting from Conference Proceedings, authors should, in addition to noting the ASEE copyright, list all the original authors and their institutions and name the host city of the conference. - Last updated April 1, 2015