Signal Processing Laboratory
Program Summer 2003
State University, Los Angeles
In the Digital Signaling Processing Laboratory, teachers learn to
construct virtual instruments that process, filter, digitize and display data
and sound. The teachers trained on
the new LabVIEW 7.0 program to construct a virtual equalizer that controlled a
CD player’s volume and frequency outputs through a computer’s soundcard.
Learning the icon-based programming language, LabVIEW 7.0 will result in
the teachers utilizing the program in the classroom to explain sound waves and
frequencies and to visualize the digital process of sound transmission.
The result of this, for students, will be an increased knowledge of
digitized sound waves, thorough understanding of frequency and enhance interest
in engineering, science and technology.
The Digital Signal Processing Laboratory at
CSULA utilizes the icon-based programming software, LabVIEW 7.0 to construct
various virtual instruments. The
virtual instruments (VIs) are the digital representation of physical
instruments. Using the LabVIEW
program, students will be able to design, program and construct virtually any
physical equipment. Doing this will
enable them to test various wiring (programming) options in the VI.
This will make the construction of physical projects, such as robotic
projects, easier to design and wire correctly.
This will reduce the cost of building several prototypes, which may not
work properly or at all.
The Virtual Equalizer Project
In the Digital Signal Processing Laboratory,
teachers were able to learn LabVIEW 7.0 in order to produce programs that acted
in the same manner as physical instruments.
LabVIEW is primarily utilized to enable the user to construct virtual
instruments to be tested before they are physically built.
The final project assigned to the STEER Teachers in the DSP Laboratory
entailed building an elaborate virtual equalizer based upon an undeveloped
equalizer. It gave us the
foundation to design and construct a Virtual Equalizer that would be suitable
for classroom use and demonstrations of various functions and or subjects
related to Math and Science.
The Virtual Equalizer that I constructed can
be utilized for a variety of lessons in both Mathematics and Science. First, in
science classes, the filters used in building the equalizer either blocked or
passed a certain frequency range. This allows the program to demonstrate the
wide range of isolated frequencies,
of a Bandpass filter
signal strength and intensity, and the
display the data in charts and graphs including 3-D waveform graphs.
Second, in mathematics classes, sound and
frequency data output could display sine and cosine wave charts and graphs.
Students could manipulate the inputs and view the changes of the outputs.
Lastly, the program could be used for student
laboratory reports and projects to display data in numerous formats, analyze the
data they have gathered using a wide range of statistics and signal processing
Project Goals and Objectives
The goals and objectives of the project are
to provide students with an alternative learning tool, enhance the learning
curve of students in the various areas of mathematics and science, and increase
their interest in engineering and technology.
can provide an alternative learning tool for students, who can design
graphical programming solutions for their math and science problems and
laboratory experiments on their personal computers. Doing various assignments
and projects, they will learn and comprehend the necessary material faster and
with greater clarity. The greatest
goal or objective that this program could accomplish is to instill in students
the wish to further their education beyond high school and possibly begin a
career in the fields of engineering and technology.
Implementing the Curriculum Revisions
Implementing the use of LabVIEW into the
curriculum can be done easily with the help of the LabVIEW Basics Interactive CD
during computer lab and using visual aids, such as PowerPoint, in the
introduction and examples of the program capabilities and Excel to display
manipulated data. Each Student can
acquire the same information as a whole, them learning the material and LabVIEW
program at their own pace in the computer lab.
Instructional Resources to be Used
The instruction resources that will be needed in the classroom are the
student version of LabVIEW 7.0 for a minimum of five (5) computers to a maximum
of twenty (20) computers, copies of LabVIEW Basics Interactive CD-ROM, audio
cables and sound cards for the computers. In
addition to the physical equipment, a classroom set of PowerPoint lecture notes,
practice guide and laboratory assignment. The
lecture notes will lay the foundation of LabVIEW and its capabilities.
The LabVIEW Basics Interactive CD-ROM, practice guide and laboratory
assignments will give the students a working level of skill to complete a final
Program Support Requirements And Budget
The cost of some of the software that we used
during the summer could be less expensive. We, in the DSP Lab, were fortunate that the student version
of the LabVIEW 7.0 ($100) does not cost nearly as much as the of the other
laboratories' software. Upon
further research for the purchase price of LabVIEW, two site licenses in an
academic setting were found. The
first site license package is called LabVIEW Full Development System and cost
$4,995 for a department deployment of the software. The second site license
package is called LabVIEW Remote Panel Server.
The cost of purchasing LabVIEW Remote Panel
Servers License for five (5) users is $295.
The cost of purchasing the remote Panel Server License for 20 twenty
users is $1,195. The advantage of
using the second option is that it can be utilized over a web browser and it
does not require LabVIEW to be installed on the computer.
Additional, the students can make remote connections to the school’s
computer lab server and complete assignments on their own computer.
Today, students in
middle school have the capacity to learn so much more than teachers can provide
them. They just need to be given
information in a fun and stimulating manner.
They also have the ability to learn computer programs faster than
developers can produce them. LabVIEW
should be quite easy for them to learn and incorporate into their homework and
projects. Using this program in the
classroom and at home will help students retain the information that they have
studied. It will help them to
organize their thoughts and begin to see how math and science concepts are
related or connected to various aspects of their lives.
National Instruments – LabVIEW, Retrieved from the Internet 8/17/03, http://www.ni.com/labview/.
“Joint MAP Equalization and Channel Estimation for Frequency-Selective
and Frequency-Flat Fast Fading Channels”, Retrieved from the Internet 8/17/03,
Beyon, Jeffrey Y., LabVIEW Programming, Data Acquisition and Analysis,
Prentice-Hall, Inc., Upper Saddle River, NJ, 2001.
Anne, “Visual Imagery Boost Learning”, Retrieve from the Internet 8/20/02, http://www.detnews.com/2001/
1. Research Ethics
To support the issue of Research Ethics, all the STEER program teachers
attended a seminar on Ethics in Research. The
seminar given by Dr. Jeffrey Y. Beyon included Engineer Ethics and the NCEES
Model Rules of Professional Conduct. The
most important factor that we took away from the seminar is that public safety
is the most important in all research.
2. Value of the RET
Primarily I would tell them that if they ever have the opportunity to
participate in a program such as the STEER program, take it.
The program allowed the teachers in the program a small taste of the
world of engineering and technology. We
rarely have the opportunity to experience technological advancement on the
ground level in engineering research.
Through this program I have developed a skill that I can pass along to
my students and provide them with an opportunity of see with their own eyes how
the math and science in which they are learning, is being applied to real
projects that they themselves can construct and build upon.
There were several laboratories to work in during the summer - Digital
Signal Processing (DSP) Lab, MATIES Lab, and the SPACE Lab.
Chosen to work in the DSP Lab and I was able to expand my knowledge in
Digital Signal Transmissions. The
main skills that I will take away from this program will be the LabVIEW 7.0 icon
based programming skills, technical writing skills, and advanced techniques in
Microsoft Office programs.