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Session Number: 2649

Real-Time DSP Signal Application In An Engineering Technology Laboratory Course Using An Analog Devices’ SHARC ADSP-21061 Processor William A. Russell, Jr. Electronics Engineering Technology University of Southern Mississippi Hattiesburg MS 39406

Abstract

The objective of our "Real-Time Digital Signal Processing Applications" course is to enhance the students understanding and retention by presenting hands-on design, and implementation of real-time DSP applications. Each student is required to purchase an evaluation board, or starter kit instead of the traditional textbook. The Analog Device’s SHARC EZ-KIT Lite was chosen as the development environment for the course. The EZ-KIT consist of a ADSP-21061 with full 16-bit stereo audio I/O capabilities, and software to develop a real-time DSP application. Guitar tuning was chosen as the real-time application since each algorithm should include: design, signal acquisition, a FFT, and display of the tuned note. Classroom theory is only used to support and to strengthen the development of applications. Upon completion of the real-time DSP course, students should have a solid foundation in real-time digital signal processing.

Introduction

One would expect to find advanced digital signal processing (DSP) in high-fidelity cellular telephones, virtual-reality games, and fax machines. But, DSP also provides voice recognition in toy dolls, increases the efficiency of dishwashers, toaster ovens, and refrigerators, and controls the fuel-air mixture of automobiles. The DSP market place will grow 20% in 1998 to the $3.9 billion level, and is forecast to grow to the $13.4 billion level in 2002 according to analyst Will Strauss [1]. These dramatic changes in the use of digital signal processing, and our need to compete in the global market, dictate the necessity for our graduates to possess a hands-on knowledge of DSP technology and its implementation.

DSP education as with any new technology was a specialist field. Today, many educators are moving DSP into mainstream undergraduate education. Zoltowski et.al. is emphasizing applications such as speech, image, and array signal processing in their undergraduate courses [2]. Their past DSP courses tended to focus on a limited number of traditional topics, and were taught without any laboratory. The results of their application laboratory based DSP course increased the enrollment from 33 in the Fall 1988 to 63 in the Spring of 1995.

To further emphasize laboratory hands-on learning, Ebel et.al. is in general agreement that students learn concepts better than facts [3]. Inquiry-oriented, hands-on application based instruction also is more useful than traditional lecture courses. As with many DSP applications, high-performance processors (TMS320C30 and DSP56001) are very useful for applications such as mathematical modeling, noise analysis, and linear filters. However, if computers are used in

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Russell, W. A. J. (1999, June), Real Time Dsp Signal Application In An Engineering Technology Laboratory Course Using An Analog Devices’ Sharc Adsp 21061 Processor Paper presented at 1999 Annual Conference, Charlotte, North Carolina. 10.18260/1-2--7910