Asee peer logo

Real-time Digital Signal Processing Demonstration Platform

Download Paper |

Conference

2015 ASEE Annual Conference & Exposition

Location

Seattle, Washington

Publication Date

June 14, 2015

Start Date

June 14, 2015

End Date

June 17, 2015

ISBN

978-0-692-50180-1

ISSN

2153-5965

Conference Session

Computer Science, Computer Engineering, and Digital Systems Education 2

Tagged Division

Electrical and Computer

Page Count

11

Page Numbers

26.1306.1 - 26.1306.11

DOI

10.18260/p.24643

Permanent URL

https://peer.asee.org/24643

Download Count

184

Request a correction

Paper Authors

biography

Joseph P Hoffbeck University of Portland

visit author page

Joseph P. Hoffbeck (hoffbeck@up.edu) is an Associate Professor of Electrical Engineering at the University of Portland in Portland, Oregon. He has a Ph.D. from Purdue University, West Lafayette, Indiana. He previously worked with digital cell phone systems at Lucent Technologies (formerly AT&T Bell Labs) in Whippany, New Jersey. His technical interests include communication systems, digital signal processing, and remote sensing.

visit author page

Download Paper |

Abstract

Real-Time Digital Signal Processing Demonstration PlatformIn order to increase students' interest in digital signal processing (DSP), a series ofdemonstrations were developed to run in real-time on low cost, commercially availablehardware. This system could be used to give students hands-on experience with the algorithmsthat they are studying in a DSP or signals and systems course, or it could be used in recruitingstudents into electrical engineering. The algorithms include lowpass filter, highpass filter, echo,reverb, quantization, aliasing, Fast Fourier Transform (FFT), simple speech recognition, andvoice pitch change. The program allows the user to easily switch between algorithms, to adjustthe parameters of the algorithms, and to observe the results in real-time. The cutoff frequency ofthe filters can be changed, as can the delay of the echo and reverb, the number of bits in thequantization, the sampling frequency in the aliasing, and the frequency in the pitch changer. Thehardware consists of the C5515 eZDSP USB Stick Development Tool (which is available for lessthan $100), a microphone, speakers, and a music source such as an MP3 player, phone, or laptop.Undergraduate electrical engineering students were shown the demonstrations and were surveyedto determine if they found the demonstrations useful and which demonstrations they found mostinteresting. The C language source code for the software is available for free from the author foranyone who would like to run the demonstrations or to develop demonstrations for otheralgorithms.

Hoffbeck, J. P. (2015, June), Real-time Digital Signal Processing Demonstration Platform Paper presented at 2015 ASEE Annual Conference & Exposition, Seattle, Washington. 10.18260/p.24643

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: © 2015 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