Asee peer logo

Caller ID: A Project to Reinforce an Understanding of DSP-based Demodulation

Download Paper |


2005 Annual Conference


Portland, Oregon

Publication Date

June 12, 2005

Start Date

June 12, 2005

End Date

June 15, 2005



Conference Session

Issues in Digital Signal Processing

Page Count


Page Numbers

10.288.1 - 10.288.8



Permanent URL

Download Count


Request a correction

Paper Authors

author page

Michael Morrow

author page

Thad Welch

Download Paper |


This paper discusses one of the most popular projects in our real-time DSP course’s, de- modulating a telephone’s caller ID signal. We will describe the use of a modified telephone coupler to allow students to access the caller ID signal and then discuss a number of the DSP methods and techniques that are required to successfully demodulate, decode, and dis- play the caller ID information. This project has been exceedingly well received by both our undergraduate and graduate students and represents a DSP-based solution to a real world communications problem that every student has seen in use. This project involves almost every aspect of real-time signal processing implementation, but is not so overwhelming in scope that it cannot be completed in a reasonable amount of time.

Wright, C., & Morrow, M., & Welch, T. (2005, June), Caller ID: A Project to Reinforce an Understanding of DSP-based Demodulation Paper presented at 2005 Annual Conference, Portland, Oregon. 10.18260/1-2--14327

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: © 2005 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