Student Projects with Wes Swartz for 2001-2002 |
Implementation of a laboratory platform for illustrating digital radio concepts
|
http://people.ece.cornell.edu/wes/Projects |
With the advent of high-speed analog-to-digital
converters, direct sampling of RF or IF frequencies
is possible followed by all digital signal processing
for the filtering and band selection. Sample
integrated circuits on prototyping boards are
available to be used for building a "software" radio
that can be used in the EE488 lab for teaching principles
of receiving and demodulating RF signals with digital
techniques.
Much progress was made on this project during the
2000-2001 school year by Adeline Tan and Lynn Yeo.
Local oscillators (appropriate clocks in the digital
domain) must yet be designed, built, and the the
whole system implemented.
There are two specific integrated circuits that we
used in this project, both from Analog Devices:
AD6640
(a 67-MHz ADC) and
AD6620
(a three stage programmable filter). We have the prototyping boards with
these ICs and have interfaced then with the parallel printer port of a PC.
Specific tasks:
- Learning how to use the AD filter design software.
- Learning how to use the Proto-boards with the control software.
- Determining filter needs, specifying filter center frequencies,
bandwidths, and shapes.
- Designing additional clocking and control circuits.
- Packaging the system.
- Evaluating interface performance.
- Documentation.
Students assigned:
Direct comments to
Wes Swartz.
Last modified on 2001/8/1.