Student Projects with Wes Swartz for 2001-2002 |
Design of a multiple digital receiver system for radars
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http://people.ece.cornell.edu/wes/Projects |
High-speed analog-to-digital converters, and special
dsp filter ICs make possible the design of programmable
digital receivers for sophisticated radars requiring
multiple receivers each with the same and reproducable
characteristics.
A system with a minimum of 4 digital receivers
(and hopefully 8) is to be designed for
mutiple 50-MHz RF inputs with output bandwidths
of up to 1 MHz (each) requiring very high-speed data
transfers to a host computer. The RF, sampling,
filtering, data multiplexing, and interfacing
circuits are to be designed and constructed on
multi-layer printed circuits. The digital interface
can be a separate project.
There are two specific integrated circuits that I expect to use
for each of the receivers, both from Analog Devices:
AD6640
(a 67-MHz ADC) and
AD6620
(a three stage programmable filter).
Specific tasks:
- Designing the circuits required for control of the receivers:
- Gated (by radar controller), simultaneous, clocking the ADCs.
- Downloading the filter coefficients and control codes to the AD6620.
- Clocking the data transfers.
- Multiplexing of the different receiver outputs into a common bus
to interface to a PC. Receiver selection order and number must
be flexible and fully programmable.
(Collaboration with the student(s) working on the
digital interface
project is expected. The interface must be bi-directional.)
- Layout of printed circuits card(s).
- Fabrication, packaging.
- Performance evaluation.
- Documentation.
Students assigned:
Direct comments to
Wes Swartz.
Last modified on 2001/9/19.