GR-Radar, Passive Radar

Does anyone have a link to any recent progress made on this? I recently
saw this lecture:

and this project

but nothing in the past 7 years??


Karl Y Petrow
Maritime Information Systems, Inc.
[email protected]mailto:[email protected]
Tel: +1 401-247-7780
Cell: +1 901-570-0349
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Skype karl.petrow

On Mon, Mar 25, 2013 at 9:18 AM, Karl Petrow
[email protected] wrote:

Does anyone have a link to any recent progress made on this? I recently saw
this lecture:

We’ve done work with some commercial customers researching low-power
active radar with USRPs, but these were (customer) internal projects
that did not get published externally.

Regarding passive radar–it is very difficult with low-cost hardware
such as the USRP to get the dynamic range needed to simultaneously
receive the direct path from an emitter and the echoes from an
airborne target. Some types of scene geometry would allow physical
shielding to attenuate the direct path for a subset of the antenna
array, which would help reduce the dynamic range necessary.


Could you just use Yagi’s and send I/Q streams to a server? Maybe a
time issue with TCP/IP lag. But you could possibly time stamp the I/Q
data… Additionally, I am interested in larger, slower marine vessels
more than small, fast moving planes.

What do you mean by Dynamic Range? I have briefly looked at the
University of Washington setup where they are separated by mountains. I
assume since they are observing such a far distance, the receiving
stations are relatively not far apart(150km). Couldn’t you network two
stations like they do here and just use yagi’s(one pointed directly
toward the tower and one towards your area of interest?) They would
need to be close since your observation field is at a much shorter
distance. Why would you need to use only one USRP? I can send a I/Q
stream with a Raspberry Pi and have all demodulation and processing done
on the server side.

Thanks for the help,

Karl Petrow