Anyone remember the program that would let you input an mp3 and it would flash your CRT a certain way that you could pick up the song on an AM radio close by? I believe it was called tempest like the codename.
Radar is kind of fun to get into, though 2 Ghz isn't a very good frequency for (through-wall) imaging. http://ocw.mit.edu/resources/res-ll-003-build-a-small-radar-... has some SAR demos, and if you follow to Dr. Charvat's website you can see he made a 10 Ghz system that images through concrete walls very well.
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