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Alum Builds Better Bandwidth

American University alumna Marissa Stupca (MS mathematics ’07) is helping develop a new sampling technique that could change how some digital media are developed. Called the Projection Method, this new technique will enable multipurpose cell phones and other communications devices to utilize more bandwidth as needed.

Consumers today “want to talk on the phone; they want to send a photo; they want to do everything all at once,” says Stupca. The Projection Method may allow them to do just that.

 

Inside the Projection Method

Sampling processes read chunks of data and then reconstruct the data using a mathematical formula. Different theorems are used to do this, and they are developed depending on the bandwidth needed.

One theorem commonly employed in sampling is called the Shannon Method. Currently used in digital media such as cell phones, the Internet, and compact disc players, this method operates on a fixed bandwidth. Because of this, it is too inflexible to meet the increased demands of today’s consumer, says Stupca.

In contrast, the Projection Method is based on a theorem that adjusts to the increased bandwidth needs of users who increasingly use their phones to store and send photo, audio, and video files. The method was invented by Stephen Casey, Stupca’s mentor and a professor in AU's Department of Mathematics and Statistics.

 

—Adapted from “Student Gives Digital Media a Boost,” by Hugo Mendoza (MA journalism and public affairs ’08), Catalyst, Fall 2007.